680 oz = 42.5 lb. To convert ounces to pounds, divide by 16: 680 ÷ 16 = 42.5.
How to convert ounces to pounds
lb = oz × 0.0625
- 1 oz = 0.0625 lb (and 1 lb = 16 oz).
- Multiply the amount by the factor: 680 × 0.0625 = 42.5.
- Answer: 680 oz = 42.5 lb.
Shortcut: dividing by 16 gives the same result as multiplying by 0.0625.
Ounces to Pounds table
| Ounces (oz) | Pounds (lb) |
|---|---|
| 675 oz | 42.1875 lb |
| 676 oz | 42.25 lb |
| 677 oz | 42.3125 lb |
| 678 oz | 42.375 lb |
| 679 oz | 42.4375 lb |
| 680 oz | 42.5 lb |
| 681 oz | 42.5625 lb |
| 682 oz | 42.625 lb |
| 683 oz | 42.6875 lb |
| 684 oz | 42.75 lb |
| 685 oz | 42.8125 lb |
| oz | lb |
|---|---|
| 1 oz | 0.0625 lb |
| 5 oz | 0.3125 lb |
| 10 oz | 0.625 lb |
| 50 oz | 3.125 lb |
| 100 oz | 6.25 lb |
| 1,000 oz | 62.5 lb |
Good to know
The international pound is defined as exactly 0.45359237 kg (0.453592 rounded), so 1 kg ≈ 2.20462 lb.
Quick estimate: halve the pounds and subtract 10% (e.g. 200 lb → 100 − 10 = 90 kg; exact 90.72 kg).