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
| pounds | kilograms |
|---|---|
| 1 | 0.453592 |
| 2 | 0.907185 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 20 | 9.07185 |
| 25 | 11.3398 |
| 45 | 20.4117 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 120 | 54.4311 |
| 130 | 58.967 |
| 140 | 63.5029 |
| 150 | 68.0389 |
| 160 | 72.5748 |
| 180 | 81.6466 |
| 200 | 90.7185 |
| 220 | 99.7903 |
| 250 | 113.398 |
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.