Unit Converters
Move between metric and imperial measurements with clear, reversible conversions.
Unit Conversion tools
Length Converter
Convert length measurements between common units with a reversible conversion.
Unit ConversionWeight Converter
Convert weight measurements between common units with a reversible conversion.
Unit ConversionTemperature Converter
Convert temperature measurements between common units with a reversible conversion.
Unit ConversionArea Converter
Convert area measurements between common units with a reversible conversion.
Unit ConversionVolume Converter
Convert volume measurements between common units with a reversible conversion.
Unit ConversionSpeed Converter
Convert speed measurements between common units with a reversible conversion.
Unit ConversionRecommended calculators
Pick the measurement you want to convert
Choose Length, Weight, Temperature, Area, Volume, or Speed, then select the source and destination units. Area and volume require their own squared or cubed factors. Temperature includes an offset as well as a scale factor. The hub links to focused converters rather than duplicating their tools.
Are US and imperial gallons interchangeable?
No. One US gallon is 3.785411784 liters; one imperial gallon is 4.54609 liters. Select the exact volume unit. Weight conversions describe mass and do not infer the density needed to convert a volume into a mass.