Nm to ft-lbs Converter (Newton-Meters to Foot-Pounds)
Convert torque in newton-meters to foot-pounds for torque wrenches, wheel nuts and engine specs. 1 N·m = 0.73756 lbf·ft, so 100 N·m is 73.76 ft-lbs and 200 N·m is 147.51 ft-lbs.
Real-World Benchmarks
Multi-Unit Conversion Matrix
| Group | Measurement | Symbol | Equivalent Value |
|---|---|---|---|
| SI & Metric | Newton-Millimeter | N·mm | 200,000 |
| SI & Metric | Newton-Centimeter | N·cm | 20,000 |
| SI & Metric | Newton-Meter | N·m | 200 |
| SI & Metric | Kilonewton-Meter | kN·m | 0.2 |
| Imperial & US Customary | Pound-Foot | lbf·ft | 147.5124 |
| Imperial & US Customary | Pound-Inch | lbf·in | 1,770.1492 |
| Imperial & US Customary | Ounce-Inch | ozf·in | 28,322.3865 |
| Kilogram-force | Kilogram-Force Meter | kgf·m | 20.3943 |
| Kilogram-force | Kilogram-Force Centimeter | kgf·cm | 2,039.4324 |
Step-by-Step Mathematical Explanation
- 1 lbf·ft equals 1.35581794833 N·m, so divide by that factor: 200 ÷ 1.35581794833 = 147.51243 lbf·ft.
- Direct factor: 1 N·m = 0.73756215 lbf·ft.
Essential Conversion Factors
Newton-Meter: SI unit of torque — wrenches and engines
N·m to lbf·ft formula
Direct Answer: 1 N·m = 0.73756215 lbf·ft, so multiply by 0.73756215: lbf·ft = N·m × 0.73756215. Going back: N·m = lbf·ft × 1.3558179.
How to convert newton-meters to pound-feet
Torque is force × distance. One foot-pound (lbf·ft) is one pound-force acting at one foot: 4.4482216 N × 0.3048 m = 1.3558179 N·m. Dividing newton-meters by 1.3558, or multiplying by 0.73756, gives foot-pounds. "ft-lbs", "lb-ft" and "lbf·ft" all mean the same unit.
1. N·m → lbf·ft
Multiply the number of newton-meters by the conversion factor:
Example: 200 N·m × 0.73756215 = 147.51 lbf·ft.
2. lbf·ft → N·m
To go back, divide by the same factor, or multiply by its reciprocal, 1.3558179:
Example: 147.51 lbf·ft ÷ 0.73756215 = 200 N·m.
Mental math: take off a quarter
Subtract a quarter of the N·m value. The estimate is about 1.7% high, fine for setting a click wrench:
120 N·m: 120 − 30 = 90 ft-lbs (exact: 88.51 ft-lbs).
1 N·m in other torque units
| Unit | 1 N·m equals | Typical use |
|---|---|---|
| Newton-Millimeter | 1,000 N·mm | Small fasteners and electronics |
| Newton-Centimeter | 100 N·cm | Screwdrivers and small motors |
| Kilonewton-Meter | 0.001 kN·m | Structural and heavy machinery |
| Pound-Foot | 0.73756215 lbf·ft | US engine torque and lug nuts (ft-lb) |
| Pound-Inch | 8.8507458 lbf·in | Small bolts and bicycle components (in-lb) |
| Ounce-Inch | 141.61193 ozf·in | Servos and stepper motors |
| Kilogram-Force Meter | 0.10197162 kgf·m | Older Asian and European specs |
| Kilogram-Force Centimeter | 10.197162 kgf·cm | RC servos and small motors |
N·m to lbf·ft chart
| N·m | lbf·ft |
|---|---|
| 5 | 3.69 |
| 10 | 7.38 |
| 12 | 8.85 |
| 15 | 11.06 |
| 20 | 14.75 |
| 25 | 18.44 |
| 27 | 19.91 |
| 30 | 22.13 |
| 35 | 25.81 |
| 40 | 29.5 |
| 45 | 33.19 |
| 50 | 36.88 |
| 55 | 40.57 |
| 60 | 44.25 |
| 70 | 51.63 |
| 80 | 59 |
| 90 | 66.38 |
| 100 | 73.76 |
| 110 | 81.13 |
| 120 | 88.51 |
| 130 | 95.88 |
| 140 | 103.26 |
| 150 | 110.63 |
| 180 | 132.76 |
| 200 | 147.51 |
| 250 | 184.39 |
| 300 | 221.27 |
| 350 | 258.15 |
| 400 | 295.02 |
| 450 | 331.9 |
| 500 | 368.78 |
| 600 | 442.54 |
| 800 | 590.05 |
| 1,000 | 737.56 |
lbf·ft to N·m chart
| lbf·ft | N·m |
|---|---|
| 5 | 6.78 |
| 10 | 13.56 |
| 15 | 20.34 |
| 18 | 24.4 |
| 20 | 27.12 |
| 25 | 33.9 |
| 30 | 40.67 |
| 35 | 47.45 |
| 40 | 54.23 |
| 45 | 61.01 |
| 50 | 67.79 |
| 55 | 74.57 |
| 60 | 81.35 |
| 65 | 88.13 |
| 70 | 94.91 |
| 75 | 101.69 |
| 80 | 108.47 |
| 85 | 115.24 |
| 90 | 122.02 |
| 100 | 135.58 |
| 110 | 149.14 |
| 120 | 162.7 |
| 140 | 189.81 |
| 150 | 203.37 |
| 200 | 271.16 |
| 250 | 338.95 |
| 300 | 406.75 |
| 400 | 542.33 |
| 500 | 677.91 |
Frequently Asked Questions
What is 100 N·m in lbf·ft?
100 N·m is 73.76 lbf·ft (100 × 0.73756215).
What is 400 N·m in lbf·ft?
400 N·m is 295.02 lbf·ft (400 × 0.73756215).
Is lb-ft the same as ft-lbs?
Yes, for torque. Engineers write lbf·ft or lb-ft for torque and keep ft-lbf for work and energy, but torque wrenches and service manuals use ft-lbs for the same quantity: 1.3558 N·m.
What is a typical wheel nut torque in Nm and ft-lbs?
Most passenger cars specify 110–140 N·m (81–103 ft-lbs) for wheel nuts; light trucks often 150–200 N·m (111–148 ft-lbs). Always use the figure in your vehicle's handbook.