How to convert pounds to kilograms
Formula: kg = lb × 0.453592
Worked example: 150 lb → 150 × 0.453592 = 68.0389 kg
Multiply pounds by 0.45359237, the exact legal definition, or simply divide by 2.2 for a close estimate. A 150 lb person weighs 68.04 kg, and a 45 lb Olympic barbell is 20.41 kg, which is why metric gyms use a 20 kg bar.
Pounds to kilograms conversion chart
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.453592 kg |
| 2 lb | 0.907185 kg |
| 3 lb | 1.36078 kg |
| 4 lb | 1.81437 kg |
| 5 lb | 2.26796 kg |
| 6 lb | 2.72155 kg |
| 7 lb | 3.17515 kg |
| 8 lb | 3.62874 kg |
| 9 lb | 4.08233 kg |
| 10 lb | 4.53592 kg |
| 12 lb | 5.44311 kg |
| 15 lb | 6.80389 kg |
| 20 lb | 9.07185 kg |
| 25 lb | 11.3398 kg |
| 30 lb | 13.6078 kg |
| 40 lb | 18.1437 kg |
| 50 lb | 22.6796 kg |
| 75 lb | 34.0194 kg |
| 100 lb | 45.3592 kg |
| 250 lb | 113.398 kg |
| 500 lb | 226.796 kg |
| 1,000 lb | 453.592 kg |
What is a pound?
The international avoirdupois pound has been exactly 0.45359237 kilogram since 1959, and holds 16 ounces. It is the US unit for body weight, groceries, shipping and gym plates. The abbreviation lb comes from libra, the Roman pound.
What is a kilogram?
The kilogram is the SI base unit of mass. Since 2019 it has been defined from the Planck constant rather than from a metal cylinder kept near Paris. Most countries use it for body weight, luggage allowances and groceries; one kilogram is about 2.2 pounds.