Unit Converter

The Unit Converter handles the everyday measurement conversions across five families: length (m, km, cm, mm, mi, yd, ft, in), mass (kg, g, mg, lb, oz, st), area, volume (l, ml, gal, qt, pt, cup) and temperature (Celsius, Fahrenheit, Kelvin).

Pick a category, choose the unit you have and the unit you want, and the answer appears as you type.

Most converters lump every unit into one long list, which makes it far too easy to ask for something nonsensical like metres to kilograms and get a confidently wrong number back.

This tool groups units by category and refuses to convert across families, so a length only ever becomes another length.

The linear units route through a single base unit for accuracy, while temperature is treated specially: because the scales have different zero points, it applies the real formulae rather than a simple multiplier, so 0°C correctly becomes 32°F and -40° is the one place the two scales meet.

Volume uses US measures for gallons, quarts, pints and cups, which is worth knowing if you are following a recipe.

Everything runs in your browser as a pure calculation — nothing is uploaded, nothing is logged, and it keeps working offline.

It is a quick, trustworthy answer whenever you need to move between metric and imperial without second-guessing the maths.