Unit Converters

Metric to imperial and back, with the exact definitions shown and a reference table on every page. Length, weight, temperature, volume, speed, data and shoe sizes.

Length Convertercm to inches, metres to feet, km to miles and back.Weight Converterkg to lbs, stone, grams, ounces and tonnes.Temperature ConverterCelsius, Fahrenheit and Kelvin, with the formulas explained.Volume ConverterLitres, gallons, cups, tablespoons and fluid ounces.Speed Converterkm/h, mph, knots, m/s — plus running pace.Data Storage ConverterKB, MB, GB, TB — and why your drive looks smaller than the box said.Shoe Size ConverterUS, UK and EU shoe sizes, anchored to real foot length.

More on the way

This section is still growing. Every calculator here is free, needs no sign-up, and runs entirely in your browser.