Pounds to Kilograms (lb to kg)
1 pound = 0.45359237 kilograms
How to convert pounds to kilograms
kg = lb ÷ 2.20462262
Example: 5 ÷ 2.20462262 = 2.268, so 5 pounds = 2.268 kilograms.
Pounds to kilograms is needed for American recipes, fitness programmes and medical forms. Barbell plates of 45 lb are about 20.4 kg, close to the 20 kg metric plate.
To estimate, halve the pounds and subtract 10%: 180 lb ÷ 2 = 90, minus 9 = 81 kg (exactly 81.65 kg).
Pounds to Kilograms conversion table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.4536 kg |
| 2 lb | 0.9072 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 20 lb | 9.0718 kg |
| 25 lb | 11.3398 kg |
| 45 lb | 20.4117 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 120 lb | 54.4311 kg |
| 135 lb | 61.235 kg |
| 150 lb | 68.0389 kg |
| 160 lb | 72.5748 kg |
| 175 lb | 79.3787 kg |
| 180 lb | 81.6466 kg |
| 200 lb | 90.7185 kg |
| 225 lb | 102.0583 kg |
| 250 lb | 113.3981 kg |
What is a pound?
The pound (lb) is defined as exactly 0.45359237 kilograms and consists of 16 ounces. Body weight, gym weights and baggage limits in the US are stated in pounds.
What is a kilogram?
The kilogram is the SI base unit of mass. Since 2019 it is defined through the Planck constant rather than a physical prototype. Body weight, groceries and luggage allowances are given in kilograms in most countries.
Frequently asked questions
How many kilograms are in one pound?
One pound equals 0.45359237 kilograms.
How do I convert pounds to kilograms?
Use the formula kg = lb ÷ 2.20462262. 5 ÷ 2.20462262 = 2.268, so 5 pounds = 2.268 kilograms.
What is 250 lb in kg?
250 lb = 113.3981 kg.
How do I convert kilograms back to pounds?
Use the inverse formula lb = kg × 2.20462262, or open the Kilograms to Pounds converter.
More weight and mass conversions
Need another unit? Try the full unit converter or browse all conversions.