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Inch Lbs to Nm Converter
Convert inch-pounds (in·lb) to newton-meters (N·m) and back, with ft·lb, kgf·m and ozf·in built in. Exact factor 0.11298482903, derived from SI definitions. For bolt torques, torque-wrench specs, and workshop math.
Torque Converter
11.298483
N·m
Your Value in Every Unit
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Common Torque Table
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Exact Factor, Verified
1 inch-pound is one pound-force applied at a one-inch lever arm:
1 in·lbf = 4.4482216152605 N × 0.0254 m = 0.1129848290276167 N·m
The pound-force (4.4482216152605 N) and the inch (0.0254 m) are SI-defined exact constants, so their product is exact too. Cross-check: 12 in·lb = 1.3558179483 N·m, the canonical foot-pound value. This page computes with the full constant and rounds only for display.
Workshop context: in·lb is the natural unit for torque wrenches below about 200 in·lb, where ft·lb graduations would read 0–16 ft·lb in coarse steps. Most automotive service manuals print both, e.g. 106 in·lb (12 N·m).
Scope: this page converts between torque units. To compute the correct tightening torque for a bolt from size, grade and lubrication, use our bolt-torque calculator. For pure imperial torque, see inch-pounds to foot-pounds.
Frequently Asked Questions
Multiply inch-pounds by 0.11298482903 to get newton-meters. Example: 100 in·lb × 0.11298482903 = 11.298 N·m, roughly 11.3 N·m. The calculator above does the exact math both ways.
1 in·lbf = 4.4482216152605 N × 0.0254 m = 0.1129848290276167 N·m. The pound-force (4.4482216152605 N) and the inch (0.0254 m) are both SI-defined exact constants, so the product is the exact conversion factor.
100 in·lb = 11.298 N·m, rounded to 11.3 N·m. That is a common automotive fastener spec, for example valve-cover and intake-manifold bolts.
Divide newton-meters by 0.11298482903, or multiply by 8.85074579. Example: 20 N·m × 8.85074579 = 177.0 in·lb.
Exactly 12. Torque scales linearly with the lever arm: 1 ft·lbf = 12 in·lb = 1.35581795 N·m. If your torque spec is in foot-pounds, see our inch-pounds-to-foot-pounds converter.
1 ft·lbf = 1.3558179483 N·m. Since a foot is exactly 12 inches, that is 12 × 0.11298482903 N·m per inch-pound.
Multiply ounce-force-inches by 0.00706155181. One ounce-force is 1/16 of a pound-force, so 1 ozf·in = (1/16) in·lb = 0.00706155181 N·m. Example: 250 ozf·in = 1.765 N·m.
1 kgf·m = 9.80665 N·m ÷ 0.11298482903 = 86.796 in·lb. Kilogram-force-meters are common in Japanese and European service manuals.
Inch-pounds suit low-torque fasteners (spark plugs, valve covers, scope rings) where the fine resolution of in·lb avoids rounding a critical spec, while N·m is the SI standard used in most factory service manuals. Dual-scale wrenches let you work from either manual without mental math.
Yes in practice. The pound here is the pound-force (lbf), the force exerted by one pound of mass under standard gravity. Writing in·lb for torque is shorthand for in·lbf, just as ft·lb means ft·lbf.
Torque (N·m, in·lb) and energy (joules) share dimensions but describe different physics: torque is a twisting force with no displacement requirement, while work is force through a distance. You cannot call a bolt spec joules.
No. Torque units only convert to other torque units. Power from torque needs RPM: HP = torque × RPM ÷ 5252. Use our electric-motor-torque calculator for torque-from-power math.
Torque comes from the torque-tension relation T = K × F × d, which needs the bolt size, grade, and K-factor (dry, oiled, or anti-seize). For that calculation use our bolt-torque calculator; this page only converts between torque units.
Yes. The whole tool is a single file that runs 100% in your browser with zero external requests, so it works offline and nothing you type ever leaves your device.
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