Unit-To-Unit Weight conversion

Weight & Mass Converter

1 pound = 0.45359237 kilograms

Weight conversion rests on one exact legal definition: the international avoirdupois pound is defined as exactly 0.45359237 kilograms. Every other imperial mass unit — the ounce, the dram, the grain, the stone — is a fixed fraction of that pound, so all sixteen units below reduce to the kilogram without rounding error. Troy units, used for precious metals, run on a separate 480-grain ounce and are listed separately.

Formula kilograms = pounds × 0.45359237

Weight

16 units, base kilogram. Pound by default.
Convert from
Results update on every keystroke.
=1 pound equals
Decimals 6
Equals to
0.453592
Kilogramkg
453.592370
Gramg
453592.370000
Milligrammg
453592370.000000
Microgramµg
0.000454
Metric tonnet
16.000000
Ounceoz
0.071429
Stonest
256.000000
Dramdr
7000.000000
Graingr
2267.961850
Caratct
14.583333
Troy ounceoz t
1.215278
Troy poundlb t
291.666667
Pennyweightdwt
0.000500
US short tonton
0.000446
UK long tonlong tn
Pound to Kilogram — quick reference
PoundKilogram
1 lb0.453592 kg
2 lb0.907185 kg
3 lb1.360777 kg
5 lb2.267962 kg
10 lb4.535924 kg
25 lb11.339809 kg
50 lb22.679619 kg
100 lb45.359237 kg
250 lb113.398093 kg
500 lb226.796185 kg
1000 lb453.59237 kg

Popular weight conversions

Pound to Kilogram Kilogram to Pound Ounce to Gram Gram to Ounce Stone to Pound Kilogram to Stone Pound to Ounce Gram to Kilogram Troy ounce to Gram Metric tonne to Pound Milligram to Gram Kilogram to US short ton

Learn more

Related guides: Imperial vs metric: differences and quick conversion tricks · How to scale a recipe up or down: the maths and the science · Troy vs avoirdupois ounces: the weight of precious metals · US vs UK weights and measures: gallons, pints and tons

Frequently asked

How many kilograms are in a pound?
One pound is exactly 0.45359237 kilograms. For everyday use, 1 lb ≈ 0.4536 kg, and 1 kg ≈ 2.2046 lb.
Why does a troy ounce differ from an ounce?
A troy ounce is 480 grains (31.10348 g) and is used for gold and silver; an avoirdupois ounce is 437.5 grains (28.34952 g) and is used for everything else.
Is a stone still an official unit?
The stone (14 pounds) is not part of the imperial system for trade but remains in common use for body weight in the UK and Ireland.

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