Mass conversion
Pounds to Kilograms (lb to kg)
1 lb = 0.4536 kg — multiply the number of pounds by 0.4536.
Pounds to Kilograms conversion chart
| pounds | kilograms |
|---|---|
| 1 lb | 0.4536 kg |
| 2 lb | 0.9072 kg |
| 3 lb | 1.3608 kg |
| 4 lb | 1.8144 kg |
| 5 lb | 2.268 kg |
| 6 lb | 2.7216 kg |
| 7 lb | 3.1751 kg |
| 8 lb | 3.6287 kg |
| 9 lb | 4.0823 kg |
| 10 lb | 4.5359 kg |
| 12 lb | 5.4431 kg |
| 15 lb | 6.8039 kg |
| 18 lb | 8.1647 kg |
| 20 lb | 9.0718 kg |
| 25 lb | 11.3398 kg |
| 30 lb | 13.6078 kg |
| 40 lb | 18.1437 kg |
| 50 lb | 22.6796 kg |
| 60 lb | 27.2155 kg |
| 75 lb | 34.0194 kg |
| 100 lb | 45.3592 kg |
How to convert by hand
1 lb = 0.45359237 kg
Because this is a linear conversion, the ratio never changes: every pound is always 0.4536 kg, whatever the size of the number.
Worked example: 10 lb × 0.4536 = 4.5359 kg .
Related conversions
About pounds and kilograms
Weight conversions matter most for travel, shipping and fitness, where the same object is quoted in kilograms in one country and pounds in another.
Pound
US / ImperialDefined as exactly 0.45359237 kilograms.
Commonly used for: Body weight and grocery weights in the US.
Kilogram
Metric (SI)The SI base unit of mass, defined via the Planck constant since 2019.
Commonly used for: Body weight, groceries and freight in most countries.
Questions
How many kilograms are in one pound?
One pound equals 0.4536 kg. To convert any amount, multiply the number of pounds by 0.4536.
What is 5 lb in kg?
5 lb = 2.268 kg. Type any value into the converter above to get an exact answer.
How do I convert kilograms back to pounds?
Divide by 0.4536 instead of multiplying — or use our Kilograms to Pounds converter.
Is this converter accurate?
Yes. Linear conversions use the internationally agreed factors published by NIST (SP 811), and temperature conversions use the exact defining formulas. Calculations run at full double precision and are only rounded for display.
Need a different unit?
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