How to convert pound-inches to pound-feet
- Take the value in pound-inches.
- Use the formula pound-feet = pound-inches ÷ 12.
- For example, 12 lb·in is 1 lb·ft.
About pound-inches and pound-feet
A foot is 12 inches, so one foot-pound of torque equals 12 inch-pounds. Divide inch-pounds by 12 to get foot-pounds: 60 in-lb is 5 ft-lb and 300 in-lb is 25 ft-lb.
Service manuals give small fastener torques in inch-pounds, while most click torque wrenches for cars read in foot-pounds. Reading an inch-pound spec as foot-pounds tightens the bolt 12 times too hard, which is enough to strip threads or snap a small bolt.
Examples
- 12 lb·in (one foot-pound) is 1 lb·ft
- 30 lb·in (a small fastener spec, an illustrative value) is 2.5 lb·ft
- 100 lb·in (a 100 in-lb spec) is 8.33 lb·ft
- 960 lb·in (an 80 ft-lb lug nut spec written in inch-pounds) is 80 lb·ft
Pound-inches to pound-feet chart
| Pound-inches (lb·in) | Pound-feet (lb·ft) |
|---|---|
| 1 | 0.0833 |
| 5 | 0.417 |
| 10 | 0.833 |
| 12 | 1 |
| 15 | 1.25 |
| 20 | 1.67 |
| 24 | 2 |
| 25 | 2.08 |
| 30 | 2.5 |
| 36 | 3 |
| 40 | 3.33 |
| 48 | 4 |
| 50 | 4.17 |
| 60 | 5 |
| Pound-inches (lb·in) | Pound-feet (lb·ft) |
|---|---|
| 72 | 6 |
| 75 | 6.25 |
| 80 | 6.67 |
| 90 | 7.5 |
| 100 | 8.33 |
| 120 | 10 |
| 150 | 12.5 |
| 180 | 15 |
| 200 | 16.67 |
| 240 | 20 |
| 250 | 20.83 |
| 300 | 25 |
| 500 | 41.67 |
| 1,000 | 83.33 |