Pounds to Ounces formula
1 pound = 16 ounces, and 1 ounce = 0.0625 pounds. Exactly 0.45359237 kg (international pound, 1959).
Pounds to Ounces chart
| Pounds (lb) | Ounces (oz) |
|---|---|
| 0.25 | 4 |
| 0.5 | 8 |
| 0.75 | 12 |
| 1 | 16 |
| 1.25 | 20 |
| 1.5 | 24 |
| 2 | 32 |
| 2.5 | 40 |
| 3 | 48 |
| 4 | 64 |
| 5 | 80 |
| 6 | 96 |
| 7 | 112 |
| 7.5 | 120 |
| 8 | 128 |
| 9 | 144 |
| 10 | 160 |
| 15 | 240 |
| 20 | 320 |
| 25 | 400 |
| 50 | 800 |
Values are rounded to 4 decimal places. The converter above shows more precision.
Worked examples
A newborn weighing 7.5 lb
7.5 lb × 16 = 120 oz
7.5 pounds = 120 ounces. That is 120 oz in total, or 7 lb 8 oz, the way a baby’s birth weight is normally announced.
A 2.5 lb parcel
2.5 lb × 16 = 40 oz
2.5 pounds = 40 ounces. That is 40 oz. Above 1 lb, most carriers charge by the pound, so this parcel is billed as 3 lb if they round up.
Converting pounds to ounces in real life
Pounds and ounces are used together in the US and, for babies and cooking, still widely in the UK. A newborn is usually announced as something like “7 lb 8 oz”, and baby scales or health visitors may give the weight in either form.
The trap is decimals. A scale reading of 7.5 lb is 7 lb 8 oz, not 7 lb 5 oz, because the decimal is a fraction of 16 ounces. To split a decimal weight, keep the whole pounds and multiply the decimal part by 16.
Shipping is the other big use. Carriers such as USPS price light parcels in ounces up to 1 lb, so knowing the ounce figure helps you pick the right rate. These are avoirdupois ounces, the normal weight ounce, not fluid ounces. For grams, see ounces to grams.