Convert Gram-force millimetres to Poundal feet
Convert Gram-force millimetres (gf·mm) to Poundal feet (pdl·ft) instantly and accurately.
Conversion Formula
pdl·ft = gf·mm × 0.0002327153389
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 Poundal feet
The poundal foot (pdl·ft) equals ≈ 0.04214 N·m, the torque unit of the absolute foot-pound-second system, where force is in poundals (1 pdl = 1 lb·ft/s²) rather than pound-force. It appeared in pre-SI British and American engineering texts and NACA aerodynamic stability reports alongside slug inertia values. 1 pdl·ft = 0.45359237 × 0.3048² N·m ≈ 0.04214 N·m ≈ 0.3730 lbf·in.
Quick Reference Table
| Gram-force millimetres (gf·mm) | Poundal feet (pdl·ft) |
|---|---|
| 1 gf·mm | 0.000232715 pdl·ft |
| 2 gf·mm | 0.000465431 pdl·ft |
| 5 gf·mm | 0.00116358 pdl·ft |
| 10 gf·mm | 0.00232715 pdl·ft |
| 25 gf·mm | 0.00581788 pdl·ft |
| 50 gf·mm | 0.0116358 pdl·ft |
| 100 gf·mm | 0.0232715 pdl·ft |