Unit Converter
Convert between metric and imperial units for length, weight, temperature and volume. Type in either box — both stay synced.
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Common conversions, for the curious
Length: 1 inch = 2.54 cm exactly, 1 mile = 1.609344 km, 1 foot = 0.3048 m. Weight: 1 kg = 2.20462 lb, 1 stone = 6.35029 kg. Temperature: °F = °C × 9⁄5 + 32 — and unlike the others, it's an offset conversion, so formulas not factors. Volume: 1 US gallon = 3.78541 L, 1 cup = 236.588 mL (UK cups differ!).
The converter uses exact factor definitions where they exist, so results match what engineering references give. Cooking hint: when a recipe says "cup," check whether the recipe is US or metric — that single difference ruins more bakes than oven temperature does.