Pound Kilogram Converter
Instant, accurate bidirectional conversion. Useful for body weight, shipping, luggage, and US-to-metric mass conversion.
1 lb = 0.45359237 kg
Real-time conversion. Enter either field and the other updates instantly.
Quick answer and formula
1 pound = 0.45359237 kilograms.
kilograms = pounds x 0.45359237
Pound-to-kilogram results are usually rounded to two decimals for everyday use.
Quick conversion table
| Pound | Kilogram | Formula check |
|---|---|---|
| 0.1 pounds | 0.045359237 kilograms | 0.1 x 0.45359237 |
| 0.5 pounds | 0.226796185 kilograms | 0.5 x 0.45359237 |
| 1 pounds | 0.45359237 kilograms | 1 x 0.45359237 |
| 2 pounds | 0.90718474 kilograms | 2 x 0.45359237 |
| 5 pounds | 2.26796185 kilograms | 5 x 0.45359237 |
| 10 pounds | 4.5359237 kilograms | 10 x 0.45359237 |
| 20 pounds | 9.0718474 kilograms | 20 x 0.45359237 |
| 50 pounds | 22.6796185 kilograms | 50 x 0.45359237 |
Examples
| Input | Result | Use |
|---|---|---|
| 1 lb | 0.45359237 kg | Reference conversion |
| 5 lb | 2.26796185 kg | Reference conversion |
| 10 lb | 4.5359237 kg | Reference conversion |
| 150 lb | 68.0388555 kg | Reference conversion |
How to use this converter
Best use cases
- Converting US customary weights into metric kilograms.
- Checking luggage or parcel weights for metric limits.
- Comparing body weight measurements across unit systems.
Real-world examples
- 150 lb equals about 68.04 kg.
Common mistakes
- 1 pound equals 0.45359237 kilograms.
Unit definitions and accuracy
Pound (lb)
The pound is an imperial and US customary mass unit exactly equal to 0.45359237 kilograms.
Kilogram (kg)
The kilogram is the SI base unit of mass and is equal to 1,000 grams.
Source note: Defined relationship: 1 pound is exactly 0.45359237 kilograms.
Frequently asked questions
How many kilograms are in 1 pound?
1 pound is equal to 0.45359237 kilograms.
When was this page checked?
Last updated on June 9, 2026. The conversion factor and examples were reviewed for accuracy.
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