Convert between metric and imperial units of length, weight, temperature and volume. Pick the input and output units, type a value and read the answer.
Most converters force you through ads and pop-ups. Ours is a single page, instant and works offline.
US recipes use cups and Fahrenheit. European engineering uses metres and Celsius. Global e-commerce shows product dimensions in both systems. A wrong unit conversion destroyed a Mars orbiter in 1999, unit mistakes are not just inconvenient, they are expensive.
Keep significant figures reasonable. Converting 1 metre to feet gives 3.28084 feet, but reporting six decimal places implies false precision. Round to what your use case actually needs.
Yes, Celsius, Fahrenheit and Kelvin are all supported. Note Kelvin starts at absolute zero (−273.15°C), so negative Kelvin inputs are rejected.
US, metric and Imperial (UK) cups are all different sizes. The converter exposes each variant, pick the one your recipe uses.
All conversions use the official BIPM factors and are accurate to 15 decimal places. We display the first 6 by default for readability.
Not directly, that depends on the density of the substance. Use a recipe-specific tool for ingredient conversions.