• The Ultimate Collection of Online Calculators
• ABE Volume Calculator Page - Collections of volumetric calculators for a variety of shapes. Including cylinder sphere barrel pyramid and dome.
• Body Height Weight Converter - Converts from American to metric units and vice versa
• Calcula  Compound unit calculators and converters. Interfaces with GNU source code available.  
• 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 page, such as state demographics and presidents.
• Calculator.com - Online calculators for a variety of conversions and calculations.
• 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.
• Convertalot - Collection of free Java measurements converters, calculators, unit translators and Java Games with downloadable source code.
• 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.
• Dario Alpern's Complex Number Calculator - Computes basic operations, 1/z, pi, exponent, log, trig, and polygamma functions..
• 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 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.
• 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 /calculators for converting metric to imperial units and vice-versa
• On-Line Measures Converter - Length, area, mass and weight, volume and capacity, temperature, angles, force, torque, electrical cloth sizes, and some others.
• 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.