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Weight & Mass Converters

Popular weight pairs like kg ↔ lbs.

Weight conversions come up on scales, nutrition labels, shipping forms, and gym plates. These quick converters cover the pairs that matter day to day: kilograms and pounds, grams and ounces, and the UK stone-and-pounds format.

We use the international avoirdupois pound, defined as exactly 0.45359237 kg, so 1 kg = 2.20462 lb and 1 oz = 28.3495 g. Stone results are shown as whole stone plus remaining pounds, the way they are read in the UK and Ireland. Note that fluid ounces measure volume, not weight — use the volume converters for liquids.

All weight & mass converters

Pick a tool to see the calculator, formula, worked example, and FAQs.

Weight Kg → Lbs Convert kilograms to pounds. Weight Lbs → Kg Convert pounds to kilograms. Weight Grams → Ounces Convert grams to ounces. Weight Ounces → Grams Convert ounces to grams. Weight Kg → Stone Convert kilograms to stone and pounds. Weight Stone → Kg Convert stone (and lbs) to kilograms.

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