Convert pounds to kilograms in one step. Type a value, see the answer and a few related units, and use the chart below for common values. Free, private, and runs entirely in your browser.
Divide the number of pounds by 2.2046 to get kilograms. The units are defined in terms of each other, so the conversion is exact. The calculator uses the full-precision factor, while the factor printed here is rounded.
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.4536 |
| 5 | 2.268 |
| 10 | 4.5359 |
| 25 | 11.3398 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 120 | 54.4311 |
| 150 | 68.0389 |
| 180 | 81.6466 |
| 200 | 90.7185 |
| 250 | 113.3981 |
| 300 | 136.0777 |
How many kg is 1 pound? Exactly 0.45359237 kg, about 0.454 kg.
What is a quick way to convert lb to kg? Halve the pounds and subtract 10% of that. For 150 lb, half is 75, minus 7.5 is 67.5, close to the exact 68.04.
Convert 150 pounds to kilograms: 150 ÷ 2.2046 = 68.0389 kg.
Is the pounds to kilograms factor exact? Yes. The units are defined in terms of each other, so the factor has no uncertainty.
Can I convert kilograms back to pounds? Yes. Use the converter in the opposite direction, which is linked below.
The pound gets its abbreviation lb from the Latin libra pondo, meaning a pound by weight. Since the 1959 international agreement the pound has been defined as exactly 0.45359237 kilograms, so the conversion factor is exact and the same in every English-speaking country.
Use this converter for body weight, luggage limits, baby weights and gym plates. A 150 lb person weighs 68.04 kg, and a 50 lb airline bag is 22.68 kg. The stone and pounds line helps with British body weights.
What is a quick estimate for pounds to kilograms? Multiply or divide by the rounded factor, 1 ÷ 2.2046, then use the calculator for the exact value.
Does the converter work on a phone? Yes. It runs in your browser and updates when you press Calculate.