- Conversions-R-Us - Convert units of measurements, bases, and PPT, RTF, DOC, and XLS files to HTML.
- Math Connect - Provides calculations of various types including metric conversion.
- GoConvert - A comprehensive site for conversion calculations. Convert 165 currencies and hundreds of measurements.
- Measurement Units Translation - Measurements converter for time, length, volume, and weight. Requires JavaScript.
- On-Line Measures Converter - Length, area, mass and weight, volume and capacity, temperature, angles, force, torque, electricals, cloth sizes, and some others.
- Metric System Formulas - Formulas for converting imperial system into metric system. Site in both English and French.
- Unit Conversions - Online calculator -- Mississippi State University
- Convert It - Conversion calculator of physical measurements. Includes metric and English units and also a large range of other possible conversions.
- 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.
- Convertalot - Collection of free Java measurements converters, calculators, unit translators and Java Games with downloadable source code and zip files.
- MegaConverter - Best Place to Figure What Equals What. megaConverter is THE resource for units, weights, measures, calculators and converters.
- 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).
- Unit Converter - Online Java unit conversions - converts anything to anything.
- Chinese Numbers - Chinese Numbers converter. Find Chinese equivalents to English numbers.
- Convert-me.Com - Interactive calculators for many common and exotic measurement systems, including metric, Ancient Greek, Roman, and old Russian.
- Online Unit Converter - Personalizable, free, and available in five languages. It converts distance and length, area, capacity and volume, pressure, temperature, and speed.
- Netbored Tools - Weight, temperature, length, area, capacity, pressure, speed and time, also currency converters and translators.
- 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.
- Engineering Conversion Factors - Online calculators for all engineering units of measurement from Process Associates.
- iAgora Conversions - The most complete Unit Conversion Engine around - supports calculations involving temperature, length, mass, and more; Along with a Traditional Conversion Table.
- Convert-Me - Metric, English old Russian, ancient Greek and Roman, nautical, typographical and astronomical conversions.
- Fuzzycrawler - Converts metric, imperial, energy, torque, acceleration, mass, force, length, light, mass force, and electricity.
- Science Made Simple - Online metric converter gives U.S. customary and metric conversions.
- Online Converters - Provide online javascript converters and calculators for converting metric to imperial units and vice-versa.
- Online Conversion - Convert just about Anything to Anything else Over 8,100 Conversions and Calculators
- WWW Unit Converter - Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.
- Ninja Suit - Specializes in e-tools, such as online converters and calculators, for business, education, science, travel, research and enjoyment purposes.
- Measurement Unit Converter - Converts many units of measurement using a JavaScript 1.1 applet.
- MrCalculator - A collection of calculators that run in your web browser.
- 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.
- English-Chinese Ideographic Generator - English-Chinese number converter and chart with ideographic and unicode equivalents
- Physics Calculator - This RPN calculator implements arithmetic and scientific operations and functions, as well as predefined physical constants.
- Unit conversion and Reference Tables - A very handy unit conversion, nearly every known unit is listed here.
- ABE Volume Calculator Page - A collection of volumetric calculators for a variety of shapes. Including cylinder sphere barrel pyramid and dome.
- Prefix Conversion Calculator - Conversion Calculator for Prefixes
- FUSE Continuous Viewing Zone Calculator - This calculator can be used to estimate the right ascension and declination of the continuous viewing zone.
- Equatorial to Galactic Converter - Convert Equatorial to Galactic Coordinates
- KW Liquid tank Heating calculator - To determine kW required to raise the temperature of any Liquid
- Schmidt R Value Conversions - Convert Schmidt R Values to PSI or N/mm2
- SingleChips - Online, Java Flow Calculator - Java applet, natural gas flow calculator
- Calcula - Compound unit calculator and converter. Interface with GNU source code available. In both Spanish (Castellano) and English.
- MIT 3.091 Units Converter - A tool for engineers and others to convert from almost any set of units to any other.
- EngNet Engineering Units Converter - Online calculator provides conversions between a number of common (and not so common) units.
- Conversion of Units - Database of conversion factors and a calculator.
- 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.
- 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.
- Body Height Weight Converter - Converts from American to metric units and vice versa.
- Interactive Unit Equivalency Table Generator - Generates an equivalency table from any engineering unit to any other.
- Dario Alpern's Complex Number Calculator - Computes basic operations, 1/z, pi, exponent, log, trig, and polygamma functions. Includes memory feature.
- Online Calculators.net - Online Calculators provide free online javascript calculators and converters for unrestricted use
- 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.
- eFunda: Units and Constants - The index page for units, fundamental constants, and currencies.
- 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.
- Martindale's Calculators - An extensive collection of calculators for the sciences, business and everyday measurements. Organized by subject area.
- SciNet Resources : Unit Conversions - Various unit conversion programs for engineering including Enthalpy, Entropy, Thermal Conductivity , and Viscosity conversion.
- 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.
- Hiox Calculator & Converter - Features calcutors for arithmetic functions, scientific computations, binary conversions, areas, finanical interest, prime numbers, recurring fractions, factoring, matrices, HEX color converter, date and day calculations, as well as for measuring bandwidt
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