1 N·m is 0.7376 lb·ft, so a lug nut spec of 100 N·m is 73.8 lb·ft.
| Newton-meters (N·m) | Pound-feet (lb·ft) |
|---|---|
| 10 | 7.38 |
| 20 | 14.75 |
| 30 | 22.13 |
| 40 | 29.50 |
| 50 | 36.88 |
| 60 | 44.25 |
| 70 | 51.63 |
| 80 | 59.00 |
| 90 | 66.38 |
| 100 | 73.76 |
| 110 | 81.13 |
| 120 | 88.51 |
| 130 | 95.88 |
| 140 | 103.26 |
| 150 | 110.63 |
| 160 | 118.01 |
| 170 | 125.39 |
| 180 | 132.76 |
| 190 | 140.14 |
| 200 | 147.51 |
| 210 | 154.89 |
| 220 | 162.26 |
| 230 | 169.64 |
| 240 | 177.01 |
| 250 | 184.39 |
| 260 | 191.77 |
| 270 | 199.14 |
| 280 | 206.52 |
| 290 | 213.89 |
| 300 | 221.27 |
| 310 | 228.64 |
| 320 | 236.02 |
| 330 | 243.40 |
| 340 | 250.77 |
| 350 | 258.15 |
| 360 | 265.52 |
| 370 | 272.90 |
| 380 | 280.27 |
| 390 | 287.65 |
| 400 | 295.02 |
How it is computed
lb·ft = N·m ÷ 1.3558179. One pound-foot is one pound-force (4.448 N) acting at one foot (0.3048 m).
FAQ
Is lb·ft the same as ft·lb?+
For torque, yes; both mean pound-force times feet. Some reserve ft·lb for work and lb·ft for torque, but the number is the same.
How do I convert lb·ft to N·m?+
Multiply by 1.3558.