80 oz = 5 lb. To convert ounces to pounds, divide by 16: 80 ÷ 16 = 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: 80 × 0.0625 = 5.
- Answer: 80 oz = 5 lb.
Shortcut: dividing by 16 gives the same result as multiplying by 0.0625.
Ounces to Pounds table
| Ounces (oz) | Pounds (lb) |
|---|---|
| 75 oz | 4.6875 lb |
| 76 oz | 4.75 lb |
| 77 oz | 4.8125 lb |
| 78 oz | 4.875 lb |
| 79 oz | 4.9375 lb |
| 80 oz | 5 lb |
| 81 oz | 5.0625 lb |
| 82 oz | 5.125 lb |
| 83 oz | 5.1875 lb |
| 84 oz | 5.25 lb |
| 85 oz | 5.3125 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).