Use inch-lbs to Nm for a focused two-way pair. Use the torque converter with the N·m-to-in-lbs preset when you need a source/target menu or all four supported torque units.
The shared factor is 1 in-lbf = 0.1129848290276167 N·m. Inch-pound-force is a moment of force. It differs from foot-pound-force by a factor of 12; this is a unit distinction, not a fastener-setting recommendation.
Actual controls
| Focused inch-lbs to Nm | Torque hub with preset | |
|---|---|---|
| Inputs | One amount and a direction selector | One value, from unit and to unit |
| Units | in-lbf and N·m | N·m, kgf·m, ft·lbf, in·lbf |
| Starting scenario | 80 in-lbf → N·m | 10 N·m → in·lbf |
| Primary display | Up to 6 decimal places | Exactly 3 decimal places |
| Example | 9.038786 N·m | 88.507 in·lbf |
| Supporting results | Forward and reverse factors | All four torque equivalents |
The hub does not have two independent forward/reverse amount fields. To reverse a conversion, change its source and target units. The focused form divides by the shared factor in its N·m-to-in-lbf direction.
How the examples are obtained
80 × 0.1129848290276167 = 9.038786322209336 N·m before display rounding. The preset evaluates 10 ÷ 0.1129848290276167 = approximately 88.5074579133 in-lbf.
The focused input is nonnegative. The hub’s declared input range is −10,000 to 10,000 and its arithmetic allows signed values. Both are conversions of an already stated torque; neither determines an assembly’s required torque or a tool setting.
Limits
Keep the source unit explicit: 80 in-lbf is not 80 ft-lbf. Although torque and energy share dimensional units, torque is expressed as N·m rather than being interpreted as energy in joules. Converted display digits do not establish measurement accuracy.
Sources
NIST SP 811, unit definitions and Appendix B factors. The paired calculator controls and rounding described above are their current form behavior.