Convert torque units — Newton-meter, pound-force foot, kilogram-force meter and more.
| Unit | Name | Value |
|---|---|---|
| kN·m | Kilonewton-meter | 0.001 |
| lbf·ft | Pound-force Foot | 0.73756103 |
| lbf·in | Pound-force Inch | 8.8507324 |
| kgf·m | Kilogram-force Meter | 0.10197162 |
| kgf·cm | Kilogram-force Centimeter | 10.197162 |
| dyn·cm | Dyne-centimeter | 10000000 |
Formula: Pound-force Inch = Newton-meter × 8.851
Multiply any Newton-meter value by 8.851 to get Pound-force Inch.
Reverse: Newton-meter = Pound-force Inch × 0.113
Common torque values — factor: 1 N·m = 8.851 lbf·in
| Newton-meter (N·m) | Pound-force Inch (lbf·in) | Context |
|---|---|---|
| 0.001 N·m | 0.008851 lbf·in | Tiny mechanism |
| 0.01 N·m | 0.08851 lbf·in | Small spring |
| 0.1 N·m | 0.8851 lbf·in | Small screw |
| 1 N·m | 8.851 lbf·in | 1 N·m reference |
| 5 N·m | 44.25 lbf·in | 5 N·m small engine |
| 10 N·m | 88.51 lbf·in | Bike bolt |
| 50 N·m | 442.5 lbf·in | Small engine idle |
| 100 N·m | 885.1 lbf·in | Small car engine |
| 200 N·m | 1770 lbf·in | Mid-size car engine |
| 400 N·m | 3540 lbf·in | Performance car |
| 500 N·m | 4425 lbf·in | Large engine |
| 1000 N·m | 8851 lbf·in | 1 kN·m heavy |
| 5000 N·m | 4.425e+04 lbf·in | 5 kN·m industrial |
| 1e+04 N·m | 8.851e+04 lbf·in | 10 kN·m gearbox |
| 4e+06 N·m | 3.54e+07 lbf·in | 4 MN·m wind turbine |
N·m × 8.851 = lbf·in. Round to × 8.85.
1 N·m = 8.851 lbf·in. 0.113 N·m = 1 lbf·in.
lbf·in × 0.113 = N·m.
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.
The newton-meter (N·m) is the SI unit of torque (and also of energy — though context distinguishes them). It equals the torque produced by a force of one newton applied at a perpendicular distance of one meter from the pivot point. It was formally adopted with the SI system in 1960.
N·m is the universal torque unit in engineering specifications worldwide. Engine torque, fastener torque specifications, structural bolt preloads, and industrial machinery torque ratings all use N·m in metric specifications.
Interesting fact: 1 N·m of torque equals 1 joule of energy — but they are conceptually different: torque is a rotational force (vector), energy is a scalar. The same unit is used because both involve force × distance, just in different geometric contexts.
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 Newton-meter 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 N·m = 88.51 lbf·in. Reverse: 1 lbf·in = 0.113 N·m. Exact factor: 1 N·m = 8.851 lbf·in.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.