Unit Converter — Weight Converter
Convert weight and mass between grams, kilograms, and metric tons and the imperial ounce, pound, and stone. Conversions route through the gram using exact factors, so one pound is precisely 453.59237 grams and one ounce is 28.349523125 grams. This page opens on pounds-to-kilograms, the conversion people reach for most when reading recipes, parcels, and body-weight figures.
Unit conversion
Result
0.453592
1 Pounds = 0.453592 Kilograms
Conversions use standard SI/customary factors (e.g. 1 in = 0.0254 m). Temperature is converted through Celsius to handle its offset. A deterministic conversion, computed in your browser.
Reading weights across systems
Weight conversions trip people up because the round numbers do not line up: a kilogram is about 2.205 pounds, not two, and a stone is fourteen pounds. Routing everything through the gram with exact factors keeps the result precise no matter how unusual the pairing — pounds to grams for baking, kilograms to stone for body weight, ounces to grams for coffee.
Strictly these are units of mass rather than weight, but in everyday use on Earth the distinction does not affect the number you read off a scale, which is what this converter is built for.
Questions
- How many grams are in a pound?
- Exactly 453.59237 grams. An ounce is one-sixteenth of that, 28.349523125 grams, so both convert without approximation.
- What is a stone in kilograms?
- One stone is 14 pounds, which is about 6.35 kilograms. Stone is still common for body weight in the UK and Ireland.