Pounds and ounces
One avoirdupois pound contains 16 mass ounces. For 10 lb and 8 oz, first calculate 10 + 8/16 = 10.5 lb, which equals 4.762719885 kg. A mass ounce differs from a fluid ounce used for volume.
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Pounds to kilograms.
Multiply the number of pounds by 0.45359237. This is the exact relationship between the international pound and the kilogram.
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Pounds to kilograms
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Pounds to kilograms
How do you convert lb to kg?
Multiply the number of pounds by 0.45359237. This is the exact relationship between the international pound and the kilogram. The factor 0.45 provides only a rough estimate and is unsuitable for checking a strict mass limit.
kilograms = pounds × 0.45359237 pounds = kilograms ÷ 0.45359237
Reverse conversion: Kilograms to pounds →
| lb | kg |
|---|---|
| 1 | 0.45359 |
| 5 | 2.26796 |
| 10 | 4.53592 |
| 20 | 9.07185 |
| 50 | 22.67962 |
| 100 | 45.35924 |
| 150 | 68.03886 |
| 200 | 90.71847 |
Example: a package weighing 20 lb
20 × 0.45359237 = 9.0718474 kg. A 10 lb package has a mass of 4.5359237 kg. Table results are rounded, while the converter uses the exact defined factor.
Unit relationship reference: NIST — conversion factors. Long decimal values are rounded for display.
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