Pound-inches to Newton-meters Converter
Enter the torque in pound-inches below to convert it to newton-meters.
Convert Pound-inches to Newton-meters
Enter a value in pound-inches (lb·in) to convert to newton-meters (N·m).
Pound-inch to Newton-meter Conversion Table
Table showing various pound-inch measurements converted to newton-meters. Click any preset value or arrow to load it into the converter.
| Pound-inches (lb·in) | Newton-meters (N·m) |
|---|---|
| 1 lb·in | 0.1129848 N·m |
| 2 lb·in | 0.2259697 N·m |
| 5 lb·in | 0.5649241 N·m |
| 10 lb·in | 1.1298483 N·m |
| 15 lb·in | 1.6947724 N·m |
| 20 lb·in | 2.2596966 N·m |
| 25 lb·in | 2.8246207 N·m |
| 30 lb·in | 3.3895449 N·m |
| 40 lb·in | 4.5193932 N·m |
| 50 lb·in | 5.6492415 N·m |
How to Convert Pound-inches to Newton-meters
To convert pound-inches to newton-meters, multiply the torque by the following conversion ratio: 0.1129848 newton-meters/pound-inch.
Since one pound-inch is equal to 0.1129848 newton-meters, you can use this simple formula to convert:
The torque in newton-meters is equal to the torque in pound-inches multiplied by 0.1129848.
For example, here's how to convert 40 pound-inches to newton-meters using the formula above.
How Many Newton-meters Are in a Pound-inch?
There are 0.1129848 newton-meters in a pound-inch, which is why we use this value in the formula above.
Our pound-inch to newton-meter calculator automatically converts your torque measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Pound-inches and newton-meters are both units used to measure torque. Keep reading to learn more about each unit.
What Is a Pound-inch?
A pound-inch is a unit of torque equal to 0.1129848 newton-meters (N·m), the base unit for torque. 1/12 of a pound-foot (0.112985 N·m). [1]
The pound-inch is classified as a US customary and imperial unit of torque. Pound-inches can be abbreviated as lb·in; for example, 1 pound-inch can be written as 1 lb·in.
When working with pound-inches (lb·in) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, pound-inches (lb·in) are widely used across standard torque applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Newton-meter?
Coherent SI unit of rotational torque. It serves as a primary reference unit for measuring torque across scientific and practical applications. [2]
The newton-meter is classified as an International System of Units (SI) unit of torque. Newton-meters can be abbreviated as N·m; for example, 1 newton-meter can be written as 1 N·m.
As the primary coherent reference unit for torque in this category, all other torque units are mathematically anchored to the newton-meter (N·m).
In practice, newton-meters (N·m) are widely used across standard torque applications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
When converting torque between pound-inches (lb·in) and newton-meters (N·m), keep full floating-point precision (1 lb·in = 0.1129848 N·m; 1 N·m = 8.8507458 lb·in) during intermediate calculations and round only the final newton-meter figure to match your instrument tolerance.
More Pound-inch & Newton-meter Conversions
Need to calculate in the opposite direction? Use our newton-meters to pound-inches converter (N·m to lb·in) to switch your starting unit immediately. You can also explore related tools such as converting pound-feet to newton-meters, converting kgf·m to newton-meters, or converting pound-inches to pound-feet.
Convert from Pound-inches
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Moment of Force & Torque))·Torque Metrology Standard — Pound-inches (lb·in) to Newton-meters (N·m)
- [2]NIST App. B.8 SpecificationNIST App. B.8 (NIST SP 811 Alphabetical Conversion Factors)·Unit Specifications: Pound-inch (in·lbf) (lb·in) & Newton-meter (N·m)
- [3]BIPM ReferenceBIPM (Mechanics & Rotational Work (N·m))·Conversion Factors & Mathematical Basis (lb·in to N·m)