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Pounds to Kilograms (lbs to kg)

Multiply pounds by 0.45359237 to get kilograms — that factor is the legal definition of the international pound. Dividing by 2.2046 gives the same answer to four decimal places.

Kilograms
0.453592

Formula

kilograms = pounds × 0.45359237

Example: 10 pounds = 4.53592 kilograms.

Pounds to Kilograms chart

poundskilograms
10.453592
20.907185
52.26796
104.53592
209.07185
2511.3398
4520.4117
5022.6796
10045.3592
12054.4311
13058.967
14063.5029
15068.0389
16072.5748
18081.6466
20090.7185
22099.7903
250113.398

Good to know

A quick estimate: halve the pounds and take off 10%. 180 lb ÷ 2 = 90, minus 9 = 81 kg (the exact figure is 81.65).

Medication doses for children and animals are often given per kilogram, which is one of the few everyday cases where the exact number matters — use the calculator rather than the estimate there.

Frequently asked questions

How many kg is 1 pound?

1 pound is 0.45359237 kg — about 454 grams.

How many kg is 150 lbs?

150 lb is 68.04 kg.

How do I convert stones and pounds to kg?

Convert to pounds first (1 stone = 14 lb), then multiply by 0.45359237. 11 st 4 lb = 158 lb = 71.67 kg.

More weight & mass conversions