Inch Pounds to Foot Pounds Calculator
Convert torque between inch-pounds (in-lbs) and foot-pounds (ft-lbs) instantly. The relationship is simple: 1 foot-pound equals 12 inch-pounds. This calculator also provides the newton-meter equivalent for metric reference.
Inch-pounds and foot-pounds are both US customary torque units. Since there are 12 inches in a foot, the conversion is a simple multiply or divide by 12.
The Formula:
- Foot-pounds = Inch-pounds / 12
- Inch-pounds = Foot-pounds x 12
- 1 in-lb = 0.1130 N·m
- 1 ft-lb = 1.3558 N·m
When to Use Each Unit:
- Inch-pounds are used for small fasteners: electronics screws, carburetors, small engine bolts, bicycle components, and firearms assembly.
- Foot-pounds are used for larger fasteners: wheel lug nuts, engine head bolts, suspension components, and structural connections.
Common Torque Specs in Inch-Pounds:
| Application | Torque (in-lbs) | Torque (ft-lbs) |
|---|---|---|
| Small machine screws | 5-10 | 0.42-0.83 |
| Scope rings (firearm) | 15-25 | 1.25-2.08 |
| Carburetor bolts | 20-35 | 1.67-2.92 |
| Bicycle stem bolts | 48-60 | 4.0-5.0 |
| Spark plugs (small engine) | 120-180 | 10-15 |
| Valve cover bolts | 72-108 | 6-9 |
Pro tip: Always verify the unit on your torque wrench before tightening. Many click-type wrenches switch between in-lbs and ft-lbs with a toggle.