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Weight and mass converter

Pick any two mass units. The pound has been exactly 0.45359237 kg since 1959, so every factor here is exact.

0.453592

1 lb = 0.453592 kgkg = lb × 0.45359237 · shown to 6 significant figures

Precision

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Popular conversions

Kilograms to poundsTier 01 kilogram = 2.204622622 pounds. Type in either box; the other updates as you go.Pounds to kilogramsTier 01 pound = 0.45359237 kilograms exactly. Type in either box; the other updates as you go.Grams to ouncesTier 01 gram = 0.03527396195 ounces. Type in either box; the other updates as you go.Pounds to ouncesTier 01 pound = 16 ounces exactly. Type in either box; the other updates as you go.Grams to poundsTier 01 gram = 0.002204622622 pounds. Type in either box; the other updates as you go.Ounces to poundsTier 01 ounce = 0.0625 pounds exactly. Type in either box; the other updates as you go.Grams to kilogramsTier 01 gram = 0.001 kilograms exactly. Type in either box; the other updates as you go.Milligrams to gramsTier 01 milligram = 0.001 grams exactly. Type in either box; the other updates as you go.Ounces to gramsTier 01 ounce = 28.349523125 grams exactly. Type in either box; the other updates as you go.Pounds to tonsTier 01 pound = 0.0005 US tons exactly. Type in either box; the other updates as you go.Tons to poundsTier 01 US ton = 2,000 pounds exactly. Type in either box; the other updates as you go.Stone to poundsTier 01 stone = 14 pounds exactly. Type in either box; the other updates as you go.Pounds to gramsTier 01 pound = 453.59237 grams exactly. Type in either box; the other updates as you go.Kilograms to gramsTier 01 kilogram = 1,000 grams exactly. Type in either box; the other updates as you go.Metric tons to tonsTier 01 metric ton = 1.102311311 US tons. Type in either box; the other updates as you go.Grams to milligramsTier 01 gram = 1,000 milligrams exactly. Type in either box; the other updates as you go.Pounds to stoneTier 01 pound = 0.07142857143 stone. Type in either box; the other updates as you go.Kilograms to stoneTier 01 kilogram = 0.1574730444 stone. Type in either box; the other updates as you go.Stone to kilogramsTier 01 stone = 6.35029318 kilograms exactly. Type in either box; the other updates as you go.

Everyday "weight" in kilograms or pounds is, strictly, mass: what a scale reports after dividing the measured force by standard gravity. Since 1959 the avoirdupois pound has been defined as exactly 0.45359237 kg, and the ounce, stone and US ton are fixed multiples of it, so conversions between metric and US or imperial weights are exact.

Use the converter above for any pair, including carats for gemstones and troy ounces for precious metals. The most searched pairs have their own pages with worked examples and quick-reference tables, listed above.