- Martindale's Calculators
An extensive collection of calculators for the sciences, business and everyday measurements. Organized by subject area.
- The Foot Rule
Convert units from one measure to another (e.g. meters to yards, liters to gallons). A very extensive collection of units and categories. Includes usage and definitions descriptions of units and categories.
- ABE Volume Calculator Page
A collection of volumetric calculators for a variety of shapes. Including cylinder sphere barrel pyramid and dome.
- Allchin Measurements Converter
Converts common measurements from metric to imperial and vice versa, with other systems included for selected quantities such as light years, picas, and Old Russian measures.
- Body Height Weight Converter
Converts from American to metric units and vice versa.
- Calcula
Compound unit calculator and converter. Interface with GNU source code available. In both Spanish (Castellano) and English.
- Calculate for Free
A variety of tools for determining an array of metrics and measurements.
- Calculator City
Includes tools to solve equations like Includes calculators for velocity, density, financial, geometry, algebra, calculus, astronomy, chemistry, physics and webpage color coders. Also, has trivia fact pages, such as state demographics and presidents.
- Calculator.com
Online calculators for a variety of conversions and calculations.
- Chinese Numbers
Chinese Numbers converter. Find Chinese equivalents to English numbers.
- Conversion Factors for Energy Equivalents
Physics laboratory of the National Institute of Standards and Technology (NIST) sponsors and maintains this reference resource of CODATA-recommended values of fundamental physical restraints.
- Conversion of Units
Database of conversion factors and a calculator.
- Conversion Table of Non-Metric measures into SI and CGS
Conversion of non-metric measures into SI (meter-kilogram-second) and CGS (centimeter-gram-second).
- Conversions-R-Us
Convert units of measurements, bases, and PPT, RTF, DOC, and XLS files to HTML.
- Convert It
Conversion calculator of physical measurements. Includes metric and English units and also a large range of other possible conversions.
- Convert-Me
Metric, English old Russian, ancient Greek and Roman, nautical, typographical and astronomical conversions.
- Convert-me.Com
Interactive calculators for many common and exotic measurement systems, including metric, Ancient Greek, Roman, and old Russian.
- Convertalot
Collection of free Java measurements converters, calculators, unit translators and Java Games with downloadable source code and zip files.
- Dario Alpern's Complex Number Calculator
Computes basic operations, 1/z, pi, exponent, log, trig, and polygamma functions. Includes memory feature.
- eFunda: Units and Constants
The index page for units, fundamental constants, and currencies.
- Engineering Conversion Factors
Online calculators for all engineering units of measurement from Process Associates.
- English-Chinese Ideographic Generator
English-Chinese number converter and chart with ideographic and unicode equivalents
- EngNet Engineering Units Converter
Online calculator provides conversions between a number of common (and not so common) units.
- Equatorial to Galactic Converter
Convert Equatorial to Galactic Coordinates
- FUSE Continuous Viewing Zone Calculator
This calculator can be used to estimate the right ascension and declination of the continuous viewing zone.
- Fuzzycrawler
Converts metric, imperial, energy, torque, acceleration, mass, force, length, light, mass force, and electricity.
- GoConvert
A comprehensive site for conversion calculations. Convert 165 currencies and hundreds of measurements.
- iAgora Conversions
The most complete Unit Conversion Engine around - supports calculations involving temperature, length, mass, and more; Along with a Traditional Conversion Table.
- iFigure
Provides links to online calculators and worksheets. These are interactive, educational tools that provide information to help in planning, solving and making decisions for a variety of problems and tasks that come up daily.
- Interactive Unit Equivalency Table Generator
Generates an equivalency table from any engineering unit to any other.
- KW Liquid tank Heating calculator
To determine kW required to raise the temperature of any Liquid
- Math Connect
Provides calculations of various types including metric conversion.
- Measurement Conversion
Convert volume (capacity), weight, length, area, temperature, pressure, torque, power and energy measures between U.S./Imperial and SI (Metric) units. Requires JavaScript.
- Measurement Unit Converter
Converts many units of measurement using a JavaScript 1.1 applet.
- Measurement Units Translation
Measurements converter for time, length, volume, and weight. Requires JavaScript.
- MegaConverter
Best Place to Figure What Equals What. megaConverter is THE resource for units, weights, measures, calculators and converters.
- Metric Sucks
Metric to English conversion utility, with emphasis on the author's view that the English units are superior. The calculator combines conversions with humor.
- Metric System Formulas
Formulas for converting imperial system into metric system. Site in both English and French.
- MIT 3.091 Units Converter
A tool for engineers and others to convert from almost any set of units to any other.
- MrCalculator
A collection of calculators that run in your web browser.
- Netbored Tools
Weight, temperature, length, area, capacity, pressure, speed and time, also currency converters and translators.
- Ninja Suit
Specializes in e-tools, such as online converters and calculators, for business, education, science, travel, research and enjoyment purposes.
- On-Line Measures Converter
Length, area, mass and weight, volume and capacity, temperature, angles, force, torque, electricals, cloth sizes, and some others.
- Online Calculators, Conversion Tools, Measurements and Weights
A directory of resources that will calculate a variety of weights and measures.
- Online Calculators.net
Online Calculators provide free online javascript calculators and converters for unrestricted use
- Online Conversion
Convert just about Anything to Anything else Over 8,100 Conversions and Calculators
- Online Converters
Provide online javascript converters and calculators for converting metric to imperial units and vice-versa.
- Online Unit Converter
Personalizable, free, and available in five languages. It converts distance and length, area, capacity and volume, pressure, temperature, and speed.
- Physics Calculator
This RPN calculator implements arithmetic and scientific operations and functions, as well as predefined physical constants.
- Prefix Conversion Calculator
Conversion Calculator for Prefixes
- Ron's Hard Conversion Tools
Online unit conversion calculators for volume, distance, weight, and temperature units. Also includes number conversion (decimal, hex, and binary) and a tool to convert characters to or from ASCII codes.
- Schmidt R Value Conversions
Convert Schmidt R Values to PSI or N/mm2
- Science Made Simple
Online metric converter gives U.S. customary and metric conversions.
- SciNet Resources : Unit Conversions
Various unit conversion programs for engineering including Enthalpy, Entropy, Thermal Conductivity , and Viscosity conversion.
- SingleChips - Online, Java Flow Calculator
Java applet, natural gas flow calculator
- Unit Conversion and Day of the Week
Over 100 conversion factors such as inches to centimetres, gallon to cubic metres or even curie to becquerel. Includes instructions as to how to use the conversion factors in your calculations.
- Unit conversion and Reference Tables
A very handy unit conversion, nearly every known unit is listed here.
- Unit Conversions
Online calculator -- Mississippi State University
- Unit Converter
Online Java unit conversions - converts anything to anything.
- WWW Unit Converter
Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.
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