Formula
kilograms = (pounds + ounces ÷ 16) × 0.45359237
How the mixed conversion works
Pounds and ounces must first be expressed as one decimal-pound value. Divide ounces by 16, add that amount to the pounds, and then multiply the total by 0.45359237.
- Divide the ounce field by 16.
- Add the result to the pound field.
- Multiply the total pounds by 0.45359237.
Worked example: 10 lb 8 oz
Eight ounces is half a pound, so 10 lb 8 oz equals 10.5 lb. The metric calculation is:
10.5 × 0.45359237 = 4.762719885 kg
Common mixed weights
| Pounds and ounces | Decimal pounds | Kilograms |
|---|---|---|
| 1 lb 8 oz | 1.5 lb | 0.680389 kg |
| 5 lb 4 oz | 5.25 lb | 2.38136 kg |
| 10 lb 8 oz | 10.5 lb | 4.76272 kg |
| 25 lb 12 oz | 25.75 lb | 11.680004 kg |
| 50 lb 0 oz | 50 lb | 22.679619 kg |
Questions people ask
Can I leave one field blank?
Yes. Enter only pounds or only ounces when that is all you have.
Can the ounces field contain decimals?
Yes. Decimal ounces are supported for scales that report them.
Is 10 lb 8 oz the same as 10.8 lb?
No. Eight ounces is 8/16, or 0.5 pound, so the decimal-pound value is 10.5 lb.