Units & Conversion
Move between measurement systems with clear formulas and useful converters.
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Area Converter
Convert area measurements with clearly labeled units and instant results.
Length Converter
Convert length measurements with clearly labeled units and instant results.
Temperature Converter
Convert temperature measurements with clearly labeled units and instant results.
Unit Converter
Convert common measurements with clearly labeled units and instant results.
Volume Converter
Convert volume measurements with clearly labeled units and instant results.
Weight Converter
Convert weight measurements with clearly labeled units and instant results.
Questions and worked answers
How many feet are in a meter?
One meter is approximately 3.280839895 feet. One international foot is exactly 0.3048 meters.
How many liters are in a gallon?
One US liquid gallon is exactly 3.785411784 liters. One Imperial gallon is exactly 4.54609 liters.
How do you convert Celsius to Fahrenheit?
Multiply the Celsius temperature by 9/5, then add 32.
How do you convert kilograms to pounds?
Divide kilograms by 0.45359237 to obtain pounds.
Why are area conversions different from length conversions?
Area scales in two dimensions, so the length conversion factor must be squared.
Guides and examples
US and Imperial Measurements Explained
US customary and British Imperial systems share some familiar names, but certain units represent different quantities.
The Metric System Explained
Metric prefixes make measurement scales easier to compare. Kilo means a thousand; centi means one hundredth; milli means one thousandth.
