Weight Converter
kg, lbs, oz, stone, grams — every weight conversion in one place
About this tool
This free weight converter supports kilograms, pounds, ounces, grams, milligrams, stone, and metric tons. Type any value and every other unit refreshes instantly. It is the go-to tool when a recipe uses grams but your scale reads ounces, when an airline quotes a baggage limit in kg but you think in pounds, or when a fitness app switches between units.
Key conversion facts: 1 kilogram = 2.20462 pounds. 1 pound = 16 ounces = 453.592 grams. 1 stone = 14 pounds = 6.350 kg (used for body weight in the UK and Ireland). 1 metric ton (tonne) = 1,000 kg ≈ 2,204.62 pounds. 1 ounce = 28.3495 grams. For precious metals, the troy ounce (31.1035 g) differs from the avoirdupois ounce (28.3495 g) — this converter uses the standard avoirdupois system.
Everyday scenarios: checking that a package is under a carrier's 70 lb / 31.75 kg maximum, tracking body weight when your scale is calibrated differently from a doctor's scale, scaling a baking recipe that lists ingredients in grams when you only have a cups-and-ounces scale, and comparing international product weights where nutrition labels switch between grams and ounces.
For cooking conversions where you need to convert weight to volume (e.g. grams of flour to cups), the companion Cooking Measurements Converter accounts for ingredient density, since a cup of flour and a cup of sugar weigh different amounts.