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UNIT CONVERSION, SI UNITS, ADDING MACHINES,

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and where Applicable includes: Courses, Manuals,
Handbooks, Simulations, Animations, Videos, etc.)

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Currently the Calculators On-Line Center contains
over "23,605" Calculators & Spreadsheets,
over "3,460" Courses, Lectures, Manuals, Handbooks,
& "1,000's" of Movies, Videos, Simulations & Animations

Unit Conversion

International System of Unit

Large Conversion Calculators - Over 300 Calculators

Specialized & Medium Size Conversion Calculators

Complex Mathematics

Adding Machine Calculators ~ Paper Tape Scientific Calculators

Desktop, Scientific, RPN, etc. Calculators

Mathematics Center

Calculators On-Line Center

Unit Conversion

Measurement (All Inclusive)

INTERNATIONAL SYSTEM OF UNITS CALCULATORS & APPLETS

INTERNATIONAL SYSTEM OF UNITS - Physics Laboratory, National Institute of Standards
International System of Unit is
"...adapted from NIST Special Publication 811 (SP 811), prepared by B.N. Taylor and entitled Guide for the Use of the International System of Unit..."
For more information see The NIST Reference on Constants, Units, & Uncertainty; Physical Reference Data or the Physics Laboratory, National Institute of Standards and Technology

Some examples of International System of Units Calculators include

SI Units

SI Prefixes

Fundamental Physicsal Constants

TIME AND FREQUENCY - Time & Frequency Division, National Institute of Standards (NIST) Multimedia Time & Frequency Glossary with Time & Frequency Standards (Text & Images).
Time & Frequency Glossary
"...Unlike the glossaries produced by standards committees, Time and Frequency: From A to Z is not intended to be an official glossary of time and frequency terminology. Instead, this glossary was created as an educational tool. Like all technical fields, time and frequency has its own terminology and jargon, including terms that are seldom used outside the field, and terms that might have different meanings in other fields..."
For more information see Time & Frequency Division or the National Institute of Standards and Technology

CONVERSION CALCULATOR FOR PREFIXES - F. Tapson & Cleave Books, Centre for Innovation in Mathematics Teaching, University of Exeter, U.K.
Conversion Calculator for Prefixes
"...The main purpose of this calculator is for when a figure is given for a unit with one prefix in place, and it is desired to see if another prefix might not be more appropriate. Once the given number is keyed in, and the given prefix is selected, then the suitably adjusted value is shown for all the other prefixes. Also shown (at the bottom) is the value in (bare) units if NO prefix is used at all..."
Conversion Calculator for Prefixes includes:
deca (10¹), hecto (10²), kilo (10³), mega (10⁶), giga (10⁹),
tera (10¹²), peta (10¹⁵), exa (10¹⁸), zetta (10²¹), yotta (10²⁴)
deci (10^-1), centi (10^-2), milli (10^-3), micro (10^-6), nano (10^-9),
pico (10^-12), femto (10^-15), atto (10^-18), zepto (10^-21), yocto (10^-24)
For more information see Specialist Calculators; Cleave Books or the Centre for Innovation in Mathematics Teaching

CONVERSION FACTORS FOR ENERGY EQUIVALENTS - CALCULATOR - Physics Laboratory, National Institute of Standards
Conversion Factors for Energy Equivalents Calcultor incudes:
"...Joule (J);
kilogram (Kg);
inverse meter (1/m);
hertz (Hz);
kelvin (K);
electron volt (eV);
atomic mass unit (u);
hartree (Eh)..."
For more information see International System of Units (SI); The NIST Reference on Constants, Units, & Uncertainty; Physical Reference Data or the Physics Laboratory, National Institute of Standards and Technology

FUNDAMENTAL SI UNITS - Institut für Chemie (Institute of Chemistry), Freie Universität Berlin, Germany In English & German/Deutsch.
Fundamental SI Units includes:
"...Quantity, Name, Symbol, Name, Symbol, SI Prefixes, SI Derived Units..."
For more information see the Institute of Chemistry (English Version) or Institut für Chemie (Deutsch Version)

UNIT CONVERSION CALCULATORS & APPLETS
(Large Conversion Calculators - Over 300 Calculators)

UNIT CONVERSIONS CALCULATORS: ENGLISH & METRIC (DAVIDSON WEB CONVERSION UTILITY) - Davidson Measurement Pty. Ltd., Melbourne, Australia VERY VERY VERY...EXTENSIVE.
Unit Conversions Calculators
"...Display answers: 4 to 10 decimal places..."
"...The conversion engine and table uses full 53 bit floating point data variables to store and process the mantissa of each value..."
Examples of Unit Conversion Calculators include:
"...Pressure Calculator; Acceleration Calculator; Angle Calculator;
Area & Second Moment of Area Calculator;
Energy/Work Calculator; Force Calculator;
Length Calculator; Light Calculator;
Mass & Moment of Inertia Calculator;
Moment of Force or Torque Calculator; Power Calculator;
Pressure or Stress Calculator;
Temperature Calculator; Time Calculator;
Velocity; Viscosity Calculator;
Volume Calculator; etc..."
For more information see Davidson Measurement Pty. Ltd.

UNIT CONVERSIONS CALCULATORS - Chemie.DE Information Service GmbH, a Life Science Network Division VERY VERY VERY...EXTENSIVE.
Examples of Unit Conversion Calculators include:
"...Acceleration Calculator; Angle Calculator; Area Calculator;
Area Dipole Moment Calculator;
Capacity Calculator; Charge Calculator; Compressibility Calculator;
Conductivity Calculator; Current Calculator;
Density Calculator, Dipole Moment Calculator, Dose Equivalent Calculator;
Dose Load Calculator;
Energy Calculator; Effectivity Calculator; Entropy Calculator; Exposure Calculator;
Force Calculator; Frequency Calculator;
Illuminance Calculator; Inductance Calculator;
Kinematic Viscosity Calculator;
Length Calculator; Luminance Calculator; Luminous Energy Calculator;
Luminous Flux Calculator; Luminous Intensity Calculator;
Mass Calculator; Magnetic Flux Calculator; Magnetic Flux Density Calculator;
Magnetic Reluctance Calculator; Magnetisation Calculator;
Permitivity Calculator; Power Calculator; Pressure Calculator;
Radian Calculator; Radioactivity Calculator; Range Calculator;
Reciprocal Focal Length Calculator; Resistance Calculator;
Solid Aangle Calculator;
Temperature Calculator; Thermal Inductance Calculator; Thermal Insulance Calculator;
Thermal Resistance Calculator; Time Calculator; Transfer Rate Calculator;
Velocity Calculator; Viscosity Calculator; Voltage Calculator; Volume Calculator; etc..."
For more information see Chemie DE

UNIT CONVERSIONS CALCULATORS - The Converter Site, Alastair Hazell VERY VERY EXTENSIVE.
Unit Conversions Calculators
"...Display answers: 1 to 7 decimal places..."
Examples of Unit Conversion Calculators include:
Acceleration Converter Calculator
Centimeters per Second, Decimeters per Second, Dekameters per Second, etc..."
Area Converter Calculator
"...Acres, Ares, Barns, Hectares, Square Angstroms, Square Feet,
Square Hectometers, Square Inches, Square Miles, Square Millimeters, etc..."
Energy Converter Calculator
"...British Thermal Units, Calories, Electron Volt, Ergs, Foot Pounds,..."
Fuel Consumption Converter Calculator; Length and Distance Converter Calculator;
Liquid Volume Converter Calculator; Mass and Weight Converter Calculator;
Power Converter Calculator; Temperature Converter Calculator;
Time Converter Calculator; Velocity Converter Calculator; etc..."

UNIT CONVERTER CALCULATORS - Dredging Engineering Research Laboratory, Mechanical Engineering and Marine Technology, Faculty O.C.P., Delft University of Technology, Delft, The Netherlands VERY VERY EXTENSIVE.
Examples of Unit Conversion Calculators include:
"...Acceleration; Area; Torque; Electricity; Energy; Force;
Force/Length; Light; Mass; Mass Flow; Density & Mass Capacity;
Power; Pressure & Stress; Temperature; Time;
Velocity & Speed; Viscosity; Volume & Capacity; Volume Flow; etc..."
For more information see Dredging Engineering Research Laboratory

UNIT CONVERSIONS CALCULATORS - TCAEP.co.uk, J. Stott VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
"...Mass (70 units);
Length - 106 units including:
Hubble; Siriusweit; Siriometre; Parsec; Spat;
Myriametre; Mile; League; Lieue; Kilometre; Encablure;
Furlong; Cable Length; Skein; Arpent; Bolt/Cloth;
Chain/Engineer's; Shacles; Chain/Surveyor's; Rope;
Perche; Ell; Metre; Yard; Pace; etc.,
Typography Lengths: Metre; Inch; Pica; Philosophia; Petit Romain; Gaillarde; Point; etc.
Volume/Capacity - 89 units including:
Acre-foot; Cubic Metre; Cubic Yard; Perch; Buttt; Puncheon;
Quarter; Seam; Muid; Hogshead; Barrel; Cran; Coomb; Sack; Bag;
Kilderkin; Bushel; Winchester Bushel; Firkin; Bucket; Peck; Gallon; etc.
Area - 74 units including:
Township, Square Mile; Square League; Square Mile;
Circular Mile; Square Kilometre; Quarter Section;
Acre; Arpent; Vergees; Rood; Square Chain; Skein; Are; Perche;
Square Rod; Barrel; Square Metre; Square Bohr;
Square Picometre; Barn; Square Fermi; Shed; etc.
Mass Density (17 units);
Linear Density (17 units);
Surface Density (13 units);
Time (30 units);
Force (16 units);
Energy, Heat and Work (42 units);
Power (44 units); etc..."
For more information see Welcome to TCAEP.co.uk

UNIT CONVERSION CALCULATORS (ENGLISH, METRIC, OLD ENGLISH & SPECIAL UNITS (JAPANESE, SPANISH, LATVIA, IRANIAN, OLD TESTAMENT ETC.) - R.E. Greaves, Araneid Creations, U.K. VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
Acceleration; Angle Calculator; Angular Accleration Calculator; Area Calculator;
Capacitance Calculator; Charge Calculator; Concentration Calculator; Current Calculator;
Density Calculator; Dynamic Viscosity Calculator; Energy Calculator; Force Calculator;
Illumination Calculator;
Length Calculator; Length (Foreign) Calculator; Linear Density Calculator;
Magnetic Flux Calculator; Magnetic Induction Calculator; Mass Calculator;
Mileage Calculator; Moment of Inertia Calculator;
Potential Calculator; Power Calculator; Pressure Calculator;
Solid Angle Calculator; Speed Calculator; Surface Tension Calculator;
Temperature Calculator; Thermal Conductivity Calculator; Time Calculator;
Torque Calculator; Volume Calculator;
Weight Calculator; Weight (Foreign) Calculator; etc.
Ancient Weight Conversions include
Arabic Weights; Greek Weights; Roman Weights;
Old Testament Weights; Old Palestine Weights; etc.
Ancient Length Conversion include
Arabic; Assyrian; Aztec; Babylon; Biblical; Chinese;
Druid; Egyptian; Greek; Hashimi; Homeric; Old French;
Olympic; Persian Royal; Roman; Sumerian; etc.

For more information see The Foot Rule

CONVERSION OF UNITS/UMRECHNUNG VON EINHEITEN - Institut für Chemie (Institute of Chemistry), Freie Universität Berlin, Germany VERY VERY EXTENSIVE.
Available in English & German/Deutsch.
Conversion of Units Calculator
"...You may write a numerical value and a permissible unit into the free-form field. Alternatively, the unit may be selected from the selector box. The numerical value may be omitted (default is 1). You may select the "wanted" unit from the selector box. Alternatively, a permissible "wanted" unit (US name) may be written into the free-form field (usually, no numerical value).
For more information see the Institute of Chemistry (English Version) or Institut für Chemie (Deutsch Version)

CONVERTUNIT/KONVERTERA - M. Bergsten, Stockholm, Sweden VERY VERY EXTENSIVE.
Available in English & Swedish/Svenska.
Significant Figures to 7 places with option to use Scientific Notation.
Depending on Measuring Conversion, Unit Conversions include:
"...Metric; British; American; Chinese; Japanese; Nautical;
Avoirdupois; Ancient Greek; Biblical; Old Swedish; Troy;
Astronomical;, etc..."
Unit Conversion Calculators include:
"...Area; Data Storage; Distance/Length; Energy; Fuel Consumption;
Power; Pressure; Speed; Temperature; Time; Volume/Capacity;
Weight/Mass; etc..."

CONVERT-ME - S. Gershtein VERY VERY EXTENSIVE.
Available in English & Russian.
Depending on Measuring Conversion, Unit Conversions include:
"...Metric; British & American; Japanese;
Chinese Imperial; Thai; Nautical;
Typographical (British & U.S.: ATA System);
Typographical (Europe: Didot System);
Astronomical; Old French; Old Russian;
Ancient Roman; Biblical; Ancient Greek; Artillery; etc..."
Unit Conversion Calculators include:
"...Weight & Mass Calculator; Distance & Length Calculator;
Capacity & Volume Calculator; Area Calculator; Speed Calculator;
Temperature Calculator; Pressure Calculator;
Energy & Work Calculator; Power Calculator; Torque Calculator;
Circular Measure Calculator; etc..."

CONVERT IT - ConvertIt.com, Inc. VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
"...Area Calculator; Acceleration Calculator; Angular Acceleration Calculator,
Momentum Calculator; Power Calculator; Velocity Calculator;
Dose Equivalent Calculator; Dynamic Viscosity Calculator;
Electric Charge Calculator; Electric Charge Density Calculator; Electric Current Calculator;
Electric Dipole Moment Calculator; Electric Field Strength Calculator;
Electric Flux Density; Calculator Electric Potential Calculator;
Electric Resistance Calculator; Force Calculator; Frequency Calculator;
Heat Capacity Calculator; Heat Flux Density Calculator;
Kinematic Viscosity Calculator; Length Calculator; etc..."

CRUDE OIL, CONDENSATE, LPG, LNG, ETHANE, RATES PER DAY/YEAR, CHOKE SIZES ETC. - SANTOS CONVERSION CALCULATORS - Santos Limited, Adelaide, Australia VERY VERY VERY...EXTENSIVE.
Examples of Petroleum Calculators include:
Crude Oil Calculator INPUT Values include
"...Barrels;
1000 Barrels of Oil Equivalent (KBOE);
Tonnes or Kilolitres..."
Condensate Calculator INPUT Values include
"...Barrels;
1000 Barrels of Oil Equivalent (KBOE);
Tonnes or Kilolitres..."
Liquefied Petroleum Gas (LPG) Calculator INPUT Values include
"...Barrels;
1000 Barrels of Oil Equivalent (KBOE);
Tonnes or Kilolitres..."
Liquefied Natural Gas (LNG) Calculator INPUT Values include
"...1000 Barrels of Oil Equivalent (KBOE);
Tonnes;
Terajoule (TJ) or Petajoule (PJ)..."
Ethane Calculator INPUT Values include
"...Million Dubic Metres (MMCM);
Million Cubic Feet (MMCF);
KTonnes;
Terajoule (TJ)..."
Volume Calculator INPUT Values include
"...Cubic Metres;
Cubic Feet;
Barrels;
Litres;
Kilolitres;
US Gallons;
Imperial Gallons..."
Choke Sizes Calculator INPUT Values include
"...Inches;
Millimetres;
64ths..."

For more information see Santos

EASY UNIT CALCULATOR - EasyUnitConverter.Com VERY VERY EXTENSIVE.
Examples of Calculators include:
"...Angle Calculator; Area Units Calculator; Computer Calculator;
Cooking Units Calculator; Density Calculator;
Electric Capacitance Calculator; Electric Current Calculator; Frequency Calculator;
Illuminance Calculator; Length Calculator; Power Units Calculator;
Speed Calculator; Time Calculator; Weight Calculator; etc..."

ENERGY CALCULATIONS: CRUDE OIL, REFINED PRODUCTS (GASOLINE, DISTILLATES, RESIDUAL FUEL, ETC.), COAL, NATURAL GAS, METALS, ETC. - New York Mercantile Exchange, Inc. VERY VERY VERY...EXTENSIVE.
Energy Calculators
Crude Oil Calculators include
Crude Oil Volume Calculator
Crude Oil Futures Calculator
Refined Oil Products Calculators include
Unleaded Gasoline Calculator;
Unleaded Gasoline Futures Calculator;
Kerosene Calculator;
Distillates: Heating Oil & Diesel Calculator;
Heating Oil Futures Calculator;
Residual Fuel Oil Calculator;
Propane Calculator..."
Natural Gas Calculators include
"...Natural Gas Calculator;
Natural Gas Futures Calculator..."
Coal Calculator Calculator;
Crack Spreads Calculator;
Sparks Spreads Calculator; etc.
For more information see the New York Mercantile Exchange

ENGINEERING UNIT CONVERSION CALCULATORS - eFunda, Inc. VERY VERY VERY...EXTENSIVE.
ngineering Unit Conversion Calculators
"...Featuring more than 800 units in our database (and growing), we give the unit definition and SI-dimensions in addition to converting from one unit to other units in the same family..."
Engineering Unit Conversion Calculators include:
"...Temperature Calculator; Viscosity Calculator;
Electric Calculator; Luminous Calculator;
Wire Gages Calculator; Sheet Metal Gages Calculator;
Acceleration Calculator; Acoustic Impedance Calculator;
Angle Calculator;
Angular Velocity Calculator; Area Moment of Inertia Calculator;
Electromagnetic Radiation Flux density Calculator;
Entropy Calculator;
Exposure Calculator; Fracture Toughness Calculator;
Illuminance Calculator;
Logarithm of a Ratio Calculator; Luminous Intensity Calculator;
Magnetic Flux Calculator; Magnetomotive Rorce Calculator;
Molar Electric Charge Calculator; Permeability Coefficient Calculator;
Radiance Calculator; Refractive Power Calculator;
Surface Density Calculator; etc..."
For more information see Calculators or Engineering Fundamentals

ENGINEERING CONVERSION CALCULATORS - EngNet Ltd VERY VERY EXTENSIVE.
Engineering Unit Conversion Calculators include:
"...Acceleration Calculator; Angular Acceleration Calculator;
Area Calculator; Dynamic Viscosity Calculator; Force Calculator;
Kinematic Viscosity Calculator; Linear Velocity Calculator;
Angular Velocity Calculator; Density Calculator; Mass Flow Calculator; etc..."
For more information see Tips & Tools or EngNet - Engineering Directory

ENGINEERING CALCULATORS - G. Feric, Engineering Software, Germantown, MD VERY VERY EXTENSIVE.
Engineering
"...One stop source for energy conversion systems (power and propulsion systems for simple and basic cycles) software, basic engineering calculations related to thermodynamics and fluid mechanics disciplines, software and spreadsheet product lines, online continuing education and professional development hours course..."
Engineering Calculators include:
"...Physical Properties Calculator (Air, Carbon Dioxide, etc.);
Steam Approximations Calculator;
Power Cycle Analysis Calculator (Carnot Cycle, Brayton Cycle, Magnetohydrodynamics, etc.);
Power Cycle Components/Processes Calculator (Isentropic Compression, Isentropic Expansion, etc.);
Compressible Flow Calculator; etc..."
For more information see Engineering Software (EngWare)

MEGA CONVERTER CALCULATOR (JAVA APPLETS) - Ben-Cam InterMedia VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
Angle Calculator;
Area Calculator - Foreign Area Calculations include:
Acre, Hectare, Arpent, Scotish Acre, Yoke, Barony, Sahme, etc.
Astro Distance Calculator; Force Calculator; Fraction to Decimal Calculator;
Length Calculator; Length Calculator (Foreign);
Length (Ancient); Shot Count Calculator; Weight Calculator;
Weight Calculator (Ancient); Weight Calculator (Foreign);
Weight in Space Calculator;
Wine & Spirts Calculations include:
Litres, Shot, Pony, Double, Triple, Magnum, Jeroboam, Gallon,
Keg, Wine Barrel, Beer Barrel, etc.); etc.

METALCALC - The Ganoksin Project VERY VERY EXTENSIVE.
Unit Conversion Calculators include:
Metric
Kiloton, Tonne, Hundredweight, Kilogram, Newton,
Gram, Carat, Milligram, etc.
Avoirdupois (U.S.)
Long Ton, Short Ton, Long Hundredweight, Short Hundredweight,
Stone, Pound, Ounce, Dram, Grain;
Troy
Pound, Ounce, Pennyweight, Carat, Dyne, Grain;
Apothecaries
Pound, Ounce, Dram, Scruple, Grain;
U.S. Liquid Measure
Acre foot, Cubic yard (cu yd), Barrel, Cubic foot (cu ft),
Gallon (gal), Quart (qt), Pint (pt), Gill (gi), Fluid Ounce (fl oz),
Cubic inch (cu in) Fluid dram (fl dr) Minim (min);
U.S. Dry Measure
Cubic yard (cu yd), Barrel, Bushel (bu), Cubic foot (cu ft),
Peck (pk), Gallon (gal), Quart (qt), Pint (pt), Gill (gi),
Dry Ounce (dr oz), Cubic inch (cu in), Dry dram (dr dr),
Minim (min); etc.

For more information see The Ganoksin Project

ONLINECONVERSION - onlineconversion.com VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
"...Acceleration Calculator; Angles Calculator; Area Square Calculator;
Astronomical Calculator; Date/Time Calculator; Energy Calculator;
Flow Rate Calculator; Force Calculator; Length/Distance Calculator;
Light Calculator; Numbers Calculator; etc..."

THE THERMAL WIZARD - MAYA Heat Transfer Technologies Limited, Montreal, Québec, Canada Multimedia Thermal Database & Thermal Calculators (Text & Images). VERY VERY VERY...EXTENSIVE.
Thermal Wizard
"...is developed and maintained by MAYA Heat Transfer Technologies in Montreal, Quebec, Canada. We hope you find it is a useful tool to help you understand common heat transfer problems and thermal phenomena. Although we try and test the tools to ensure quality, this tool is provided for your personal use..."
Thermal Wizard includes:
Material Properties Database "...Metals; Non-metals; Air; Gases; Water; Liquids; etc..."
Conduction Calculators examples include
"...Steady-state Conduction on Multilayer Isothermal Wall Calculator;
Conduction Across Multilayered Isothermal Cylinder Calculator;
Thermal Interface (Contact) Resistance and Temperature Difference Calculator;
Rectangular Thin Plate Embedded in Semi-Infinite Medium Calculator; etc..."
Convection Calculators examples include:
"...Forced Convection on Isothermal Flat Plate in Free Stream Calculator;
Forced Convection in the Fully Developed Region of a Duct Calculator;
Forced Convection Across Isothermal Square Rod Calculator;
Natural Convection in a Vertical Parallel Plate Channel Calcultor;
Natural Convection between Horizontal Concentric Cylinders Calculator; etc..."
Radiation Calculators examples include:
"...Radiation Between Parallel Rectangular Surfaces Calculator;
Radiation between Parallel Disk Surfaces of Unequal Radius Calculator; etc..."
Head Loss Coefficients Calculators examples include:
"...Head Loss at a Duct Entrance Calculator;
Head Loss Across a Thin Perforated Plate Calculator;
Head Loss Across Louvers Calculator; etc..."
For more information see MAYA Heat Transfer Technologies Limited

WEIGHTS AND MEASURES CALCULATOR - Agricon Africa, Cape Town, South Africa VERY VERY VERY...EXTENSIVE.
Unit Conversion Calculators include:
Acceleration Calculator; Area Calculator; Torque Calculator;
Electricity Calculator; Energy Calculator; Force Calculator;
Length Calculator; Light Calculator;
Mass Calculator; Mass Flow Calculator; Density & Mass Capacity Calculator;
Power Calculator; Pressure & Stress Calculator; Temperature Calculator;
Time Calculator; Velocity & Speed Calculator; Viscosity Calculator; etc..."
For more information see Agricon Africa

UNIT CONVERSION CALCULATORS & APPLETS
(Specialized & Medium Size Conversion Calculators)

ABE VOLUME CALCULATORS - S.D. Filip To, Department of Agricultural and Biological Engineering, Mississippi State University VERY VERY EXTENSIVE.
ABE Volume Calculators include:
"...Box Calculator;
Cube Calculator;
Partially Filled Sphere Calculator;
Full Sphere Calculator;
Cone Calculator;
Barrel Calculator;
Right Pyramid Calculator;
Pyramid with Rectangular Base Calculator;
Partilly Filled Lying Down Cylinder Calculator;
Cylinder with Hemisphere on Both Ends Calculator;
Partially Filled Domed Cylinder Calculator;
Cylinder with One Dome Calculator;
Dylinder with One Dome Calculator;
Partially Filled Grain Bin Calculator;
Cylinder Calculator;
Milk Tank Calculator;
Partially Filled Milk Tank Calculator;
Ellipsoid Calculator;
Truncated Parabloloid Calculator;
Trapezoid Tank Calculator;
Grain Gravity Wagon Calculator;
Ploygon Block Calculator;
Torus Calculator;
Revolved Trapezoid Calculator; etc..."
For more information see Engineering Tools or Home Page of S.D. Filip To

BUTTER, CHEESE, FLOUR AND BEER, COAL, HAY/STRAW CONVERSION CALCULATORS - HGCA (a Non-Departmental Public Body established under the Cereals Marketing Act 1965), London, U.K.
Conversion Calculators include:
Butter, Cheese & Beer Calculator Conversions include
"...Close; Firkin; Tub; Dutch Cask; Barrel; Essex Whey; Suffolk Whey..."
Coal Calculator Conversions include
"...Stone; Quarter; Hundredweight; Sack; Large Sack; Ton..."
Flour Calculator Conversions include
"...Stone; Poll; Bushel; Bag; Barrel; Sack..."
Hay & Straw Calculator Conversions include
"...Truss of straw; Truss of old hay; Truss of new hay..."

For more information see the Agronomy Calculators; Tools or HGCA

CONVERSION CALCULATOR - Futek Advanced Sensor Technology, Inc. VERY EXTENSIVE.
Unit Conversion Calculators include:
"...Angle Calculator; Area Calculator; Density Calculator;
Energy Calculator; Flow (mass) Calculator; Flow (vol) Calculator;
Length Calculator; Load Calculator; Magnetics Calculator;
Power Calculator; Pressure Calculator; Speed Calculator;
Temperature Calculator; Time Calculator; Torque Calculator; & Volume Calculator..."
For more information see Calculators or Futek Advanced Sensor Technology, Inc.

CONVERSION OF UNITS - UMRECHNUNG VON EINHEITEN - F. Richter, Technical University of Chemnitz-Zwickau, Bundesrepublik Deutschland (Germany) In English & German/Deutsch. VERY EXTENSIVE.
Unit Conversion Calculators include:
"...Temperature Calculator; Weight Calculator; Length Calculator;
Area Calculator; Volumes Calculator; Energy & Work Calculator;
Power Calculator; Pressure Calculator; Speed Calculator;
Fuel Consumption Calculator; Density Calculator; etc..."
For more information see English <> German Dictionary

DIGITAL DUTCH UNIT CONVERTER - CALCULATOR - DigitalDutch.com VERY EXTENSIVE.
Unit Conversion Calculators include:
"...Area Calculator; Bits & Bytes Calculator; Density Calculator;
Energy Calculator; Force Calculator; Speed Calculator; etc..."
For more information see DigitalDutch.com

FRANS' CONVERSION CALCULATORS (METRIC, IMPERIAL, U.S.) - Frans Simon van Leeuwen VERY EXTENSIVE.
Unit Conversion Calculators include:
"...Area Calculator; Currency Calculator; Density Calculator;
Fuel Calculator; Length Calculator; Pressure Calculator;
Speed Calculator; Temperature Calculator; Volume Calculator; Weight Calculator..."
For more information see Frans Simon van Leeuwen's Home Page

MEASUREMENT CONVERTER V5.0 - Electric Lighthouse VERY EXTENSIVE.
Unit Conversion Calculators include:
"...Length Calculator; Weight & Mass Calculator; Area Calculator;
Energy Calculator; Power Calculator; Dry Volume Calculator;
Liquid Volume Calculator; Velocity Calculator; etc..."
For more information see the Electric Lighthouse

COOKING CONVERTER: METRIC, IMPERIAL (U.K.), U.S. - D. Stewart, French Property, Services and Information Ltd. VERY EXTENSIVE.
Cooking Conversion Calculator includes:
"...Drop, Dash, Teaspoon, Tablespoon, Fluid Ounce, Pint, Quart, Gallon & Liter..."
NOTE: Drop or Dash Measurements
"...a drop or a dash are only approximate measures. A drop being a drop of liquid, which varies depending on the size of the dropper or surface it is leaving, as well as the thickness (viscosity) of the liquid. Published values range from 0.025 milliliters up to 0.099 milliliters, so the largest interpretation is four times that of the smallest. There are different official definitions, and cooks often vary widely from the individual definitions (reflecting the individual nature of cooking). Consequently, the figures for the smaller measures should be considered approximate only, without undue attention to exact measurement..."
For more information see French Food & Easy French Recipes or French Property, Services and Information Ltd.

METRIC CONVERSION CALCULATOR - Principal Metals, Inc. For more information see Principal Metals, Inc.

PRESSURE UNITS CONVERTER - CALCULATOR - Omega Engineering Inc. For more information see Technical Reference or Omega Engineering Inc.

SPECIALIST CALCULATORS - F. Tapson & Cleave Books, Centre for Innovation in Mathematics Teaching, University of Exeter, U.K. VERY VERY EXTENSIVE.
For more information see Specialist Calculators; Cleave Books or the Centre for Innovation in Mathematics Teaching

UNIT CONVERSION CALCULATORS - CancerWEB, University of Newcastle upon Tyne, U.K.
Unit Conversion Calculator include
"...Area Calculator; Heat Calculator; Length Calculator; Mass Calculator;
Pressure Calculator; SI Prefixes Calculator; Time Calculator;
Volume Calculator & Temperature Calculator..."
For more information see CancerWEB

UNITS OF MEASURE CALCULATORS - AUTO/TRUCK ETC. - DieselNet, Ecopoint Inc.
Unit Conversion Calculators include:
Units of Measure
"...Length; Area; Volume; Mass; Density; Force; Torque;
Pressure; Energy; Power; Velocity; Flow Rate; Temperature;
Fuel Consumption; etc..."
Smoke Density;
Sulfate Particulates..."
For more information see Calculators or Dieselnet

WEIGHT CALCULATOR - scalesgalore.com
Weight Calculator include:
"...Grams (g); Milligrams (mg); Kilograms (kg); Ounces (oz); Pounds (lb);
Troy Ounces (ozt); Pennyweight (dwt); Carats (ct); Ticals; Mommes;
Grains; Newtons; Taels (Singapore); Taels (Rep. of China); Taels (Hong Kong)..."
For more information see Scalesgalore

Complex Mathematics

Adding Machines

ADDING MACHINE CALCULATORS & APPLETS

COMPTOMETER (JAVA APPLET) - The Computer Museum, System Source, Hunt Valley, MD Multimedia Comptometer Calculator (Text & Image). For more information see Mechanical Computers: Felt & Tarrant Comptometer; Mechanical Computers; The Computer Museum or System Source

Paper Tape Scientific Calculators

PAPER TAPE SCIENTIFIC CALCULATORS & APPLETS

PAPER ROOL CALCULATORS & APPLETS

CARL'S 'PRINTING' CALCULATOR - C. Adler, Department of Physics, East Carolina University VERY VERY VERY...EXTENSIVE.
Paper Tape Scientific Calculator:
"...This works just like a printing scientific calculator, it records everything you do in the scrolling window at the right just as if it was being printed on a strip of paper. This allows you to review your work to check for mistakes and the like..."
For more information see Calculators; Image-Ination or Carl Adler's Home Page

PAPER TAPE CALCULATOR (JAVA APPLET) - Sorin Lazareanu VERY EXTENSIVE. For more information see Sorin Lazareanu's Home Page

"PAPER TAPE" SCIENTIFIC CALCULATOR WITH SOUND (JAVA APPLET) - Sorin Lazareanu VERY VERY VERY...EXTENSIVE.
Paper Tape Scientic Calculator with Audio/Sound.
For more information see Sorin Lazareanu's Home Page

Desktop, Scientific & RPN, Calculators

DESKTOP CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

SCIENTIFIC CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

RPN CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS

FOR GRAPHER/PLOTTER CALCULATORS SEE THE MATHEMATICS CENTER: GRAPHING & PLOTTING CALCULATORS

eCALC: SCIENTIFIC CALCULATOR - ecalc.com VERY VERY VERY...EXTENSIVE - VERY FAST - VERY CLEVER.
Examples of "eCalc: Scientific Calculator" Features include
"...Complex number support; Unit Conversion Utility;
Equation Solver (with support for complex numbers);
Engineering Constants List; Base Conversion Utility;
Decimal to Fraction Utility; Supports both Algebraic and Infix Modes; etc..."
For more information see eCalc

A SCIENTIFIC CALCULATOR - V.M. Ponce, Department of Civil and Environmental Engineering, College of Engineering, San Diego State University VERY VERY VERY...EXTENSIVE, VERY UNIQUE & VERY FAST. For more information see Victor Miguel Ponce's Home Page; Department of Civil and Environmental Engineering or the College of Engineering

ARACHNOID CALCULATOR - P. Lutus, Arachnoid VERY VERY EXTENSIVE.
ArachnoCalc includes:
"...Reverse Polish notation (stack) Calculator; 14-digit accuracy;
Fixed point, Scientific, Engineering, Hexadecimal, Octal and Binary number formats;
Scientific, Technical, Programming and Logic functions;
Financial functions; etc..."
For more information see Arachnoid

ASTR0-PHYSICAL CALCULATOR - C. Dolan, Department of Astronomy, University of Wisconsin, Madison, Wisconsin VERY VERY EXTENSIVE.
Astro-Physical Calculator includes:
Scientific, Technical, Programming and Logic functions
Physical Constants
"...Velocity of light; Planck constant; Gravitational constant;
Electron charge; Mass of electron; Mass of proton;
Mass of neutron; Mass of hydrogen; Avagadro's number;
Boltzmann constant; Rydberg constant; etc..."
Astronomical Constants
"...Astronomical unit; Parsec; Light year; Solar mass; etc..."
Planetary Data
"...Mass; Radius; Period; Eccentricity; etc..."

For more information see Java Applets & Javascript; Chris Dolan's Home Page or the Department of Astronomy

BIG NUMBER SCIENTIFIC CALCULATOR - D.A. Alpern, Buenos Aires, Argentina VERY VERY VERY...EXTENSIVE.
Big Number Scientific Calculator is a
"...high-precision calculator features complex numbers, precision up to 1 million digits and exponents up to 1 billion..."
For more information see Number Theory; Calculators or Darío A. Alpern's Home Page

CALC: C-STYLE ARBITRARY PRECISION CALCULATOR - L.C. Noll VERY VERY VERY...EXTENSIVE.
Calc: C-Style Arbitrary Precision Calculator
"...is arbitrary precision C-like arithmetic system that is a calculator, an algorithm prototyper and mathematical research tool. Calc comes with a rich set of builtin mathematical and programmatic functions..."
For more information see Calc Built-in Functions; C-style arbitrary precision system's Home Page; Landon Curt Noll's Home Page or isthe.com

CARL'S MATH GRAPHER CALCULATOR: GRAPHING SCIENTIFIC CALCULATOR - C. Adler, Department of Physics, East Carolina University VERY VERY EXTENSIVE. For more information see Calculators; Image-ination.com or Carl Adler's Home Page

CARL'S SCIENTIFIC CALCULATOR - C. Adler, Department of Physics, East Carolina University VERY EXTENSIVE. For more information see Calculators; Image-ination.com or Carl Adler's Home Page

CHEMICAL, UNIT CONVERSION & SCIENTIFIC CALCULATOR - First Year Chemistry, School of Chemistry, University of Sydney, Sydney, Australia VERY VERY VERY...EXTENSIVE.
Chemical, Unit Conversion & Scientific Calculator includes:
"...Scientific Calculator with up to 15 Decimal Places;
Enter a Chemical, Physical or Mathematical Constant into a Calculation;
Convert between common units in Chemistry & Science;
Enter a Chemical Formula using standard notation to calculate mass; etc.
For more information see Chemical Calculators; First Year Chemistry or the School of Chemistry

CHEMISTS SCIENTIFIC CALCULATOR - Eni Generalić, Split, Croatia Multimedia Scientific Calculator for Chemists (Text & Images). VERY VERY EXTENSIVE.
Available in Croatian, English, French, German, Italian, Spainsh.
Chemists Scientific Calculator
"...This calculator can be used as common scientific calculator (sin, cos, log, power, root, memory), but it also includes a molecular weight calculator and the tables with various physical and chemical constants. The calculator contains a list with task history, storing all the recent inputs and results. Scientific calculator displays the numbers rounded to a user-specified number of decimal places..."
For more information see Periodic Table of the Elements

COCALC2 RPN SCIENTIFIC CALCULATOR (JAVA APPLET) - CoHort Software VERY VERY EXTENSIVE.
COCALC2 RPN Scientific Calculator
"...In addition to the standard features for scientists, CoCalc includes several features for computer programmers (Hex and Binary notation..."
For more information see CoHort Software

COMPLEX CALCULATOR - A. Bunkenburg, Department of Computing Science, University of Glasgow, Glasgow, Scotland, U.K. VERY VERY VERY...EXTENSIVE.
Complex Calculator
"...implements the functions of a usual desk calculator, but accepts input and displays output both symbolically and geometrically. In addition, the program can display the action of complex functions interactively..."
For more information see Alexander Bunkenburg or the Department of Computing Science

COMPLEX NUMBER CALCULATOR - D.A. Alpern, Buenos Aires, Argentina VERY VERY VERY...EXTENSIVE.
Complex Number Calculator:
"...Reverse polish notation complex number calculator capable of performing all basic operations, powers, roots, logarithms, trigonometric functions, hyperbolic functions, gamma and polygamma functions..."
For more information see Number Theory; Calculators or Darío A. Alpern's Home Page

CONSTRUCTION CALCULATOR & ENGINEERING CALCULATOR - Wood Products Online Expo, International Online Expos Inc., British Columbia, Canada VERY EXTENSIVE.
Construction Calculator INPUT Values include:
"...Feet; Inches; Fraction..."
Output Units: "...Feet & Inches or Inches Only..."
Rounding precision of the answere includes either: "...1/2, 1/4, 1/8, 1/16, 1/32, 1/64, & 1/128..."
For more information see Calculators; Categories: Equipment, Supplies, Services & Technology; Wood Products Online Expo or International Online Expos Inc.

CONSTRUCTIVE REALS CALCULATOR: IMPLEMENTS CONSTRUCTIVE REAL ARITHMETIC (JAVA APPLET) - Hans-J. Boehm, HP Labs, Hewlett-Packard Company VERY VERY VERY...EXTENSIVE.
Constructive Reals Calculator
"...operates on constructive real numbers. Numbers are represented exactly internally to the calculator, and then evaluated on demand to guarantee an error in the displayed result that is strictly less than one in the least significant displayed digit..."
For more information see About Constructive Real Numbers (aka Recursive or Computable reals); Hans-J. Boehm's Home Page or HP Labs

DERL'S SCIENTIFIC CALCULATOR - Dredging Engineering Research Laboratory (DERL), Mechanical Engineering and Marine Technology, Faculty O.C.P., Delft University of Technology, Delft, The Netherlands VERY VERY VERY...EXTENSIVE.
DERL'S Scientific Calculator
"...designed to accept data and operating instructions in reverse polish notation, avoiding the use of parenthesis. It implements a simple 9-levels stack of floating-point numbers, with various management commands, arithmetic operations and functions, and predefined physical constants..."
For more information see Dredging Engineering Research Laboratory

GEOMETRIC CALCULATOR - Roger E Critchlow Jr., The Entropy Liberation Front VERY VERY EXTENSIVE.
Geometric Calculator is
"...an ordinary desk calculator that uses the Clifford Numbers over a three dimensional Euclidean Space. This means that in addition to doing the normal computations on (computer implemented) real numbers that you are used to finding on a desk calculator, this calculator also computes on vectors in two and three space, on the bivectors over those vectors, on the trivector over three space, on complex numbers, and on quaternions..."
For more information see The Entropy Liberation Front

HP-25 CALCULATOR SIMULATION - ENGINEERING & SCIENTIFIC (JAVA APPLET) - Applet written by L. Leinweber and hosted by Author: D.G. Hicks, The Museum of HP Calculators VERY EXTENSIVE.
HP-25 Calculator
"...These programs are not Hewlett-Packard products and are supplied without representation or warranty of any kind..."
For more information see The Museum of HP Calculators

JAVA HP16C EMULATOR (JAVA APPLET) - hp16c.com VERY VERY VERY...EXTENSIVE.
Java HP16C Emulator
"...This website provides a fully functional emulator of the Hewlett Packard HP16C Computer Scientist calculator..."
"...The emulator is much faster than the original hp16c. This is particularly noticeable during program execution, where the emulator can be up to 1000x faster than original..."
"...Programs that used to take hours to run will now finish in just a few seconds..."
"...This emulator always displays the entire register X value..."

JAVACALC - K. Kikuchi, Japan & Hosted by Mathe Online VERY EXTENSIVE.

JAVASCRIPT SCIENTIFIC CALCULATOR - J.C. Pezzullo, Georgetown University Medical Center VERY VERY EXTENSIVE.
Javascript Scientific Calculator
"...is a simple but fairly general numeric expression evaluator, with a large number of built-in transcendental functions..."
Scientific Calculator Built-in Functions include:
"...Algebraic; Transcendental; Trigonometric; Inverse Trig;
Hyperbolic; Inverse Hyp; etc..."
For more information see Interactive Statistics Calculations Pages or John C. Pezzullo's Home Page

NEWTON'S METHOD - D. Sumner, Department of Mathematics, University of South Carolina VERY EXTENSIVE.
Newton's Method Calculator
"...Enter an equation in terms of the variable x. Then enter a starting guess for x. For example,to find the square root of 2 you might enter x^2-2 for the equation, and 1 as an initial guess..."
For more information see Department of Mathematics or University of South Carolina

OCTONION CALCULATOR - G. Dixon, Lincoln, MA VERY VERY EXTENSIVE.
Octonion Calculator is
"...a conventional scientific calculator with a twist: pressing a function button produces a graph of the function (if its value is defined for the given input) and shows the (x, y) point on the graph corresponding to input and output..."
For more information see Mathematical Ideas in Science or 7 Stones

ON-LINE CALCULATOR - D. Sumner, Department of Mathematics, University of South Carolina
Sumner's On-line Calculator
"...Use * for multiplication, / for division, and ^ for exponentiation. You can also use functions such as sqrt() exp(), ln(), cos() and sin()..."
For more information see Department of Mathematics or University of South Carolina

PHYSICS POCKET COMPUTER (JAVASCRIPT): BASIC; SCIENTIFIC; PHYSICS - Jean-Pol Vigneron, Départment of Physique, Universitaires Notre-Dame de la Paix de Namur, Belgium VERY VERY VERY...EXTENSIVE. For more information see Départmnet of Physique

QUATERNION CALCULATOR (JAVA APPLET) - D. Sweetser VERY VERY VERY...EXTENSIVE.
Quaternion Calculator is a
"...calculator that can take real, complex numbers or quaternions as input, using the scalar, i, j and k buttons for each part..."
For more information see Doing Physics with Quaternions or Doug Sweetser's Home Page

REVERSE POLISH NOTATION COMPLEX NUMBER CALCULATOR (JAVA APPLET) - D.A. Alpern, Buenos Aires, Argentina VERY VERY VERY...EXTENSIVE.
Reverse Polish Notation Complex Number Calculator is
"...capable of performing all basic operations, powers, roots, logarithms, trigonometric functions, hyperbolic functions, gamma and polygamma functions..."
For more information see Calculators or Darío A. Alpern's Home Page

RPM - POSTFIX CALCULATOR - D. Stevens, School of Mathematics, University of East Anglia, U.K. VERY EXTENSIVE.
Postfix Calculator
"...The calculator works a little differently from other calculators you may have used. Suppose you want to add two numbers. Enter the first number. Press "Enter." This commits the first number into the calculator's memory. Then enter the second number. After that, enter the type of operation (such as "+") that you wish to perform..."
For more information see Dave Stevens Home Page

RPN CALCULATOR - B.M. Tissue, Department of Chemistry, Virginia Polytechnic Institute and State University VERY EXTENSIVE. For more information see Virginia Tech Chemistry Course Material

SCIENTIFIC AND STATISTICAL CALCULATOR (SHOCKWAVE: FLASH) - G. Dixon, Lincoln, MA VERY VERY EXTENSIVE. For more information see Mathematical Ideas in Science or 7 Stones

SCIENTIFIC CALCULATOR - C. Adler, Department of Physics, East Carolina University VERY EXTENSIVE. For more information see TestMaker; Image-ination.com or Carl Adler's Home Page

SCIENTIFIC CALCULATOR - Porcupine Labor Press VERY VERY EXTENSIVE. For more information see Porcupine Labor Press

SCIENTIFIC CALCULATOR FOR CHEMISTS WITH NOTEBOOK - E. Generalic, Faculty of Chemical Technology, KTF, Split, Croatia VERY VERY EXTENSIVE. For more information see Periodic Table of the Elements or Faculty of Chemical Technology

SELECTABLE PRECISION CALCULATOR (JAVA APPLET) - Nicholas Exner, Computational Science and Engineering Graduate Option Program, University of Illinois, Urbana-Champaign
Selectable Precision Calculator
"...The user selects any desired precision from 1 to 25 decimal digits. The calculator then performs the usual arithmetic operations in the chosen (fixed) precision..."
For more information see Interactive Educational Modules in Computational Science or the Computational Science and Engineering Graduate Option Program

Mathematics Center

Calculators On-Line Center ~ Home Page