Convert Pound-feet to Newton-meters
1 pound-foot (lbf·ft) equals 1.355817948 newton-meters (N·m).
1 lbf·ft = 1.355817948 N·m
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound-foot to newton-meter converter to paste a column from Excel.
How to Convert Pound-foot to Newton-meter
- 1 lbf·ft = 1.355817948 N·m
- 1 N·m = 0.7375621493 lbf·ft
- Example: convert 100 lbf·ft to N·m: 100 lbf·ft = 100 × 1.355817948 N·m = 135.5817948 N·m
Formula
N·m = lbf·ft × 1.355817948331
Derivation from SI units:
- 1 lbf·ft = 4.4482216152605 N × 0.3048 m = 1.3558179483314 N·m
- 1 N·m = 1 N × 1 m = 1 kg·m²·s⁻²
Both units are defined exactly, so the factor is exact. Pound-foot definition: pound-foot; Newton-meter definition: newton-meter.
Worked examples
- A lug-nut torque of 80 lbf·ft is 108.4654359 N·m.
80 lbf·ft × 1.355817948 = 108.4654359 N·m - An engine torque of 300 lbf·ft is 406.7453845 N·m.
300 lbf·ft × 1.355817948 = 406.7453845 N·m
Pound-foot to Newton-meter conversion table
| Pound-feet (lbf·ft) | Newton-meters (N·m) |
|---|---|
| 1 lbf·ft | 1.355817948 N·m |
| 5 lbf·ft | 6.779089742 N·m |
| 10 lbf·ft | 13.55817948 N·m |
| 15 lbf·ft | 20.33726922 N·m |
| 20 lbf·ft | 27.11635897 N·m |
| 25 lbf·ft | 33.89544871 N·m |
| 30 lbf·ft | 40.67453845 N·m |
| 50 lbf·ft | 67.79089742 N·m |
| 75 lbf·ft | 101.6863461 N·m |
| 80 lbf·ft | 108.4654359 N·m |
| 100 lbf·ft | 135.5817948 N·m |
| 150 lbf·ft | 203.3726922 N·m |
| 200 lbf·ft | 271.1635897 N·m |
| 250 lbf·ft | 338.9544871 N·m |
| 300 lbf·ft | 406.7453845 N·m |
| 400 lbf·ft | 542.3271793 N·m |
| 500 lbf·ft | 677.9089742 N·m |
| 1000 lbf·ft | 1355.817948 N·m |
Where it's used
US torque figures in lbf·ft (ft-lb) are converted to newton-metres for metric tools and international specs. Multiply by 1.3558179483.
Pound-foot to other torque units
| Conversion | 1 lbf·ft equals |
|---|---|
| pound-foot to newton-meter | 1.355817948 N·m |
| pound-foot to kilonewton-meter | 0.001355817948 kN·m |
| pound-foot to newton-centimeter | 135.5817948 N·cm |
| pound-foot to pound-inch | 12 lbf·in |
| pound-foot to ounce-inch | 192 ozf·in |
| pound-foot to kilogram-force meter | 0.1382549544 kgf·m |
| pound-foot to kilogram-force centimeter | 13.82549544 kgf·cm |
| pound-foot to dyne-centimeter | 13558179.48 dyn·cm |
Frequently asked questions
Is ft-lb the same as lbf·ft?
On torque wrenches, yes: "ft-lb" means pound-force feet. 1 lbf·ft = 1.3558179483 N·m.
How many newton-meters are in 1 pound-foot?
1 lbf·ft = 1.355817948 N·m.
How do I convert pound-feet to newton-meters?
Multiply the value in lbf·ft by 1.355817948. For example, 100 lbf·ft × 1.355817948 = 135.5817948 N·m.
Is the lbf·ft to N·m conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "pound-force foot (lbf·ft)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 5, derived units expressed with special names.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Pound-feet to Newton-meters. Retrieved October 17, 2026, from https://scientificconverters.com/torque/pound-feet-to-newton-meters/
IEEE
Scientific Converters, "Convert Pound-feet to Newton-meters," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/torque/pound-feet-to-newton-meters/