Nm to ft-lb (Newton-meters → Foot-pounds)
1. Core Idea
Nm and ft-lb are equivalent torque/work units. 1 Nm = 0.737562 ft-lb. Multiply by 0.737562 (or ÷1.355818) to convert.
2. Formula
Main: ft-lb = Nm × 0.737562
Exact reverse: Nm = ft-lb × 1.355818
Both forms are reciprocals—use whichever is quicker.
3. Quick Values
- 1 Nm → 0.738 ft-lb
- 5 Nm → 3.689 ft-lb
- 10 Nm → 7.376 ft-lb
- 20 Nm → 14.75 ft-lb
- 50 Nm → 36.88 ft-lb
- 100 Nm → 73.76 ft-lb
- 150 Nm → 110.64 ft-lb
- 400 Nm → 295.02 ft-lb
4. 3-Step Example
Example: 180 Nm → ? ft-lb
- ft-lb = Nm × 0.737562
- 180 × 0.737562
- = 132.76 ft-lb (≈132.8)
5. Where It’s Used
Vehicle & machinery torque specs, fasteners, documentation alignment, calibration sheets.
6. Accuracy & Tips
- Mental shortcut: 0.74 instead of 0.737562.
- lb·ft = ft-lb; style choice only.
- Match spec rounding (0.1 or whole).
- Convert once—no intermediate units.
7. More Examples
| Nm | ft-lb |
|---|---|
| 13.56 | 10.00 |
| 40 | 29.50 |
| 135.58 | 100.00 |
| 406.75 | 300.00 |
8. FAQ
Is 1 Nm exactly 0.7376 ft-lb?
Exact: 0.737562149. 0.738 is acceptable quick rounding.
Which formula is better?
Use ×0.737562 when going Nm → ft-lb; ÷1.355818 when going back. Same precision.