- ChemieDE: Information Service - Provides online conversion of a wide range of units.
- Chinese Numbers - Put in a number and get the Chinese representation of that number. Also, converts from Arabic numeral back to the Chinese form.
- Conversion Metric - Provides a set of unit converters and explanations of each unit.
- Conversion-Website.com - Provides online conversions between a number of types of units of measurements.
- Convert Center - Provides online unit converters.
- Convert It - Features converter tools for measurement, currency exchange, world time zones, time, finance, driving distance, Roman numerals, atmosphere, and body mass index. Also, has a basic calculator and periodic table.
- Convert-Me - Online conversions for many measurement systems.
- Converter.eu - Provides various online unit conversion tools including area, volume and permeability.
- Convertworld - Interactive multi-lingual conversion calculator for a wide variety of units.
- Easy Unit Converter - A free online unit conversion calculator covering a wide range of units.
- eFunda: Units and Constants - Convertor for a wide range of units, fundamental constants and currencies.
- iAgora Conversions - Converts temperature, currency, length, and mass.
- Imperial and Metric Online Conversion - Multilingual conversion tool for units including area, currency, energy, flowrate, force, length, mass, power, pressure, temperature, velocity and volume. Historical Greek and Roman units can also be converted.
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- Metric Unit Conversion - Online conversion calculators for the units of weight, length, temperature, volume and area.
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- Temperature Conversions - Four in one temperature conversion tool converts Celsius, Fahrenheit, Kelvin, and Rankin. Displays conversion formulas.
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- Unit Conversion - Provides a free online conversion tool to easily convert between different units of measurement in more than 70 categories.
- Unit Conversion and Reference Tables - Features converters for physical constants, SI units, temperature, currency and temperature.
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- Unit Juggler - Provides unit conversion tools for various math and physical units in different languages.
- WWW Unit Converter - Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.
