Convert Pound-inches to Newton-meters
1 pound-inch (lbf·in) equals 0.112984829 newton-meters (N·m).
1 lbf·in = 0.112984829 N·m
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk pound-inch to newton-meter converter to paste a column from Excel.
How to Convert Pound-inch to Newton-meter
- 1 lbf·in = 0.112984829 N·m
- 1 N·m = 8.850745791 lbf·in
- Example: convert 15 lbf·in to N·m: 15 lbf·in = 15 × 0.112984829 N·m = 1.694772435 N·m
Formula
N·m = lbf·in × 0.1129848290276
or N·m = lbf·in ÷ 8.850745791327
Derivation from SI units:
- 1 lbf·in = 4.4482216152605 N × 0.0254 m = 0.1129848290276 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-inch definition: pound-inch; Newton-meter definition: newton-meter.
Worked examples
- A terminal-screw torque of 35 lbf·in is 3.954469016 N·m.
35 lbf·in × 0.112984829 = 3.954469016 N·m - 100 lbf·in is 11.2984829 N·m.
100 lbf·in × 0.112984829 = 11.2984829 N·m
Pound-inch to Newton-meter conversion table
| Pound-inches (lbf·in) | Newton-meters (N·m) |
|---|---|
| 1 lbf·in | 0.112984829 N·m |
| 5 lbf·in | 0.5649241451 N·m |
| 10 lbf·in | 1.12984829 N·m |
| 20 lbf·in | 2.259696581 N·m |
| 25 lbf·in | 2.824620726 N·m |
| 30 lbf·in | 3.389544871 N·m |
| 40 lbf·in | 4.519393161 N·m |
| 50 lbf·in | 5.649241451 N·m |
| 75 lbf·in | 8.473862177 N·m |
| 100 lbf·in | 11.2984829 N·m |
| 150 lbf·in | 16.94772435 N·m |
| 200 lbf·in | 22.59696581 N·m |
| 500 lbf·in | 56.49241451 N·m |
Where it's used
Small-fastener specs in inch-pounds are converted to N·m for metric torque screwdrivers. 1 lbf·in is about 0.113 N·m.
Pound-inch to other torque units
| Conversion | 1 lbf·in equals |
|---|---|
| pound-inch to newton-meter | 0.112984829 N·m |
| pound-inch to kilonewton-meter | 0.000112984829 kN·m |
| pound-inch to newton-centimeter | 11.2984829 N·cm |
| pound-inch to pound-foot | 0.08333333333 lbf·ft |
| pound-inch to ounce-inch | 16 ozf·in |
| pound-inch to kilogram-force meter | 0.0115212462 kgf·m |
| pound-inch to kilogram-force centimeter | 1.15212462 kgf·cm |
| pound-inch to dyne-centimeter | 1129848.29 dyn·cm |
Frequently asked questions
How do I avoid mixing up in-lb and ft-lb?
Divide in-lb by 12 to get ft-lb; 120 in-lb = 10 ft-lb. Using the wrong one over- or under-tightens by a factor of 12.
How many newton-meters are in 1 pound-inch?
1 lbf·in = 0.112984829 N·m.
How do I convert pound-inches to newton-meters?
Multiply the value in lbf·in by 0.112984829, or divide it by 8.850745791. For example, 15 lbf·in × 0.112984829 = 1.694772435 N·m.
Is the lbf·in 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 inch (lbf·in)".
- 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-inches to Newton-meters. Retrieved October 17, 2026, from https://scientificconverters.com/torque/pound-inches-to-newton-meters/
IEEE
Scientific Converters, "Convert Pound-inches to Newton-meters," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/torque/pound-inches-to-newton-meters/