About Exact Units

Exact Units is a free converter for everyday units of length, weight, temperature, volume and speed. It is built to be quick, precise and uncluttered.

How we calculate

All conversions use exact, internationally agreed definitions — for example 1 pound = 0.45359237 kg, 1 inch = 2.54 cm and 1 US gallon = 3.785411784 L. Temperature uses the standard formulas. Results are rounded only for display.

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