Convert Gram-force millimetres to Pound-force feet
Convert Gram-force millimetres (gf·mm) to Pound-force feet (lbf·ft) instantly and accurately.
Conversion Formula
lbf·ft = gf·mm × 7.233013851e-6
About Gram-force millimetres
The gram-force millimetre (gf·mm) equals 9.80665 × 10⁻⁶ N·m, the natural unit for precision micro-mechanisms. Swiss watchmaking datasheets list hairspring and balance-wheel detent torques in gf·mm; micro-servo holding torques, precision force gauge spring calibration, and miniature dental handpiece torque limits also fall in this range. A typical watch hairspring torque is 0.1-5 gf·mm. 1 gf·mm = 9.80665 × 10⁻⁶ N·m = 100 dyn·cm = 0.1 gf·cm.
About Pound-force feet
The pound-force foot (lbf·ft) equals ≈ 1.35582 N·m, the dominant torque unit in North American automotive and mechanical engineering. SAE engine performance tests, US vehicle lug-nut torque specs (80-100 lbf·ft), and American industrial gearbox catalogs all use lbf·ft. V8 truck engines produce 400-600 lbf·ft; diesel pickups exceed 900 lbf·ft. 1 lbf·ft ≈ 1.35582 N·m = 12 lbf·in ≈ 192 ozf·in.
Quick Reference Table
| Gram-force millimetres (gf·mm) | Pound-force feet (lbf·ft) |
|---|---|
| 1 gf·mm | 7.233 × 10-6 lbf·ft |
| 2 gf·mm | 1.447 × 10-5 lbf·ft |
| 5 gf·mm | 3.617 × 10-5 lbf·ft |
| 10 gf·mm | 7.233 × 10-5 lbf·ft |
| 25 gf·mm | 0.000180825 lbf·ft |
| 50 gf·mm | 0.000361651 lbf·ft |
| 100 gf·mm | 0.000723301 lbf·ft |