Weight Converter
Convert weight and mass between kilograms, pounds, ounces, stone, and more.
About the Weight Converter
This converter treats kilograms as the common anchor: whatever unit you enter is first converted to kilograms using its fixed international conversion factor, then that kilogram value is converted out to every other supported unit — grams, milligrams, pounds, ounces, stone, metric tons, and carats. Routing everything through one base unit means the conversion factors stay simple and consistent rather than needing a distinct formula for every possible pair (like ounces directly to stone).
To use it: enter a value, pick its starting unit, and every other unit updates instantly. For example, entering 1 stone (a unit still common for body weight in the UK) shows about 6.35 kg, 14 lb exactly, 224 oz, and roughly 6,350,293 mg. Use the precision selector to show more decimal places when converting into a much larger unit (like milligrams into metric tons, where the result is a tiny fraction) or fewer when you just need a rounded, at-a-glance figure.