Convert torque units — Newton-meter, pound-force foot, kilogram-force meter and more.
| Unit | Name | Value |
|---|---|---|
| N·m | Newton-meter | 1.35582 |
| kN·m | Kilonewton-meter | 0.00135582 |
| lbf·in | Pound-force Inch | 12 |
| kgf·m | Kilogram-force Meter | 0.13825516 |
| kgf·cm | Kilogram-force Centimeter | 13.825516 |
| dyn·cm | Dyne-centimeter | 13558200 |
Formula: Pound-force Inch = Pound-force Foot × 12
Multiply any Pound-force Foot value by 12 to get Pound-force Inch.
Reverse: Pound-force Foot = Pound-force Inch × 0.08333
Common torque values — factor: 1 lbf·ft = 12 lbf·in
| Pound-force Foot (lbf·ft) | Pound-force Inch (lbf·in) | Context |
|---|---|---|
| 0.001 lbf·ft | 0.012 lbf·in | Tiny |
| 0.1 lbf·ft | 1.2 lbf·in | Small mechanism |
| 1 lbf·ft | 12 lbf·in | 1 lbf·ft |
| 5 lbf·ft | 60 lbf·in | Small fastener |
| 10 lbf·ft | 120 lbf·in | Wheel spoke |
| 50 lbf·ft | 600 lbf·in | Bicycle wheel |
| 100 lbf·ft | 1200 lbf·in | Small engine |
| 200 lbf·ft | 2400 lbf·in | Compact car engine |
| 300 lbf·ft | 3600 lbf·in | Mid-size car |
| 400 lbf·ft | 4800 lbf·in | Performance car |
| 500 lbf·ft | 6000 lbf·in | Large V8 |
| 650 lbf·ft | 7800 lbf·in | Record truck torque |
| 1000 lbf·ft | 1.2e+04 lbf·in | 1,000 lbf·ft |
| 5000 lbf·ft | 6e+04 lbf·in | Industrial |
| 1e+04 lbf·ft | 1.2e+05 lbf·in | Heavy machinery |
lbf·ft × 12 = lbf·in. Exact — 12 inches per foot.
1 lbf·ft = 12 lbf·in. 80 lbf·ft = 960 lbf·in (wheel bolt).
lbf·in ÷ 12 = lbf·ft.
Specifies engine torque output, drivetrain components, and wheel bolt torque in N·m and lbf·ft.
Designs fastener assemblies with torque specifications to achieve required bolt preload.
Selects motors and servos based on torque ratings in N·m or kgf·cm for joint actuation.
Calculates bending moments in beams and frames — moment = torque in structural analysis.
Follows torque charts in lbf·in and lbf·ft for airframe and engine fasteners per maintenance manuals.
Applies correct torque to flanges, pipe fittings, and coupling bolts using calibrated torque wrenches.
Pound-force foot (lbf·ft) is the standard Imperial torque unit in the United States, defined as the torque from a one pound-force applied one foot from the pivot. One lbf·ft = 1.35582 N·m.
lbf·ft dominates US automotive engineering: engine torque curves, wheel bolt torque specs, driveshaft specifications, and transmission ratings. A typical passenger car engine produces 150–300 lbf·ft; performance trucks can exceed 1,000 lbf·ft.
Interesting fact: The world's highest production-car torque record is held by the Dodge Ram TRX at 650 lbf·ft (881 N·m). Electric motors can deliver maximum torque instantly — Tesla Model S Plaid produces 1,020 lbf·ft (1,383 N·m).
Pound-force inch (lbf·in) equals 1/12 of lbf·ft (0.112985 N·m) and is used for small fasteners, electronics, precision instruments, and applications where lbf·ft would be impractically small.
lbf·in is standard for small fasteners in electronics manufacturing, firearms assembly, and precision instruments. Torque screwdrivers for electronics typically range from 0.5–20 lbf·in. Aircraft fastener specifications often use in·lbf.
Interesting fact: Overtorquing small electronics screws (which often need only 1–3 lbf·in) is a leading cause of cracked PCBs and stripped threads in consumer electronics assembly.
Converting Pound-force Foot to Pound-force Inch is common across automotive, mechanical, robotics, and structural engineering. Metric countries use N·m and kN·m; the US uses lbf·ft and lbf·in; robotics uses kgf·cm. Accurate conversion is essential when working with international workshop manuals, equipment specs, and torque wrenches.
Quick reference: 10 lbf·ft = 120 lbf·in. Reverse: 1 lbf·in = 0.08333 lbf·ft. Exact factor: 1 lbf·ft = 12 lbf·in.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.