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Converters
Lbs to KG
One pound is exactly 0.45359237 kilograms. Multiply pounds by that factor for body weight, shipping, and recipes that list mass in pounds.
1 lb = 0.4536 kg
How to use it
- Type a value in pounds. The kilograms result updates immediately.
- Read the full factor under the result if you need to check the math by hand.
- Use the table for the values people look up most often.
- Open the reverse converter when you already have kilograms.
Formula
kilograms = pounds × 0.45359237
Each avoirdupois pound is exactly 0.45359237 kilograms. Troy pounds, used for precious metals, are a different unit and are not converted here.
A 180 lb athlete
180 × 0.45359237 = 81.647 kilograms. The same athlete reading 82 kg on a metric scale would be 180.779 pounds, a little higher than 180.
A 150 lb person is 68.039 kilograms. A 5 lb bag of flour is 2.268 kilograms. Doubling a rough “half a kilo per pound” guess is close, but it misses about a third of a gram on every pound, which matters once you are pricing freight or logging a dose. This page converts the everyday avoirdupois pound only.
Common lbs to kg values
| pounds | kilograms |
|---|---|
| 1 lb | 0.4536 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 50 lb | 22.6796 kg |
| 150 lb | 68.0389 kg |
| 200 lb | 90.7185 kg |
Questions
How do I convert pounds to kilograms?
Use kilograms = pounds × 0.45359237. The converter applies that factor at full precision and rounds only what it displays.
Is this lbs to kg factor exact?
Each avoirdupois pound is exactly 0.45359237 kilograms. Troy pounds, used for precious metals, are a different unit and are not converted here.
How do I convert pounds to kilograms quickly?
Multiply pounds by 0.45359237. For a rough mental figure, take half the pounds and subtract a tenth of that half. The converter is the figure to keep.
Does ProHacks store the number I type?
No. The conversion runs in your browser. The value is not uploaded with the calculation.