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Force and Torque

lbf·intokN·m

Convert pound-force inches (lbf·in) to kilonewton-metres (kN·m).

Factor1 lbf·in = 0.0001129848 kN·m

Converter

lbf·in

Accepts numbers or expressions, e.g. 150 + 14.7

Result
1.12985kN·m

Rendered to 6 significant figures.

Formula

Formula
kN·m = lbf·in × 0.0001129848

Multiply any value in pound-force inches by 0.0001129848 to obtain the value in kilonewton-metres.

Worked example

Convert 10000 lbf·in to kN·m.

  1. 01Start with 10000 lbf·in.
  2. 02Multiply by the conversion factor: 10000 × 0.0001129848 = 1.12985 kN·m.
Result10000 lbf·in = 1.12985 kN·m

Conversion table

lbf·inkN·m
10.00011298
20.00022597
50.00056492
100.0011298
200.0022597
500.0056492
1000.011298
2000.022597
5000.056492
10000.11298

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lbf·in to kN·m?
1 lbf·in equals 0.0001129848 kN·m. To convert, multiply the value in pound-force inches by 0.0001129848.
How do I convert 1 lbf·in to kN·m?
1 lbf·in = 0.000112985 kN·m. For any value, multiply by 0.0001129848.
How do I convert kN·m back to lbf·in?
Divide by the same factor — or equivalently, multiply by 8850.746. So 1 kN·m = 8850.75 lbf·in.
When would I need to convert pound-force inch to kilonewton-metre?
Torque conversions between lbf·in and kN·m are needed in fastener specification, mechanical equipment design, drivetrain analysis and lifting/rigging calculations. Newton-metre (N·m) is the SI standard; lbf·ft and lbf·in dominate US fastener and machinery datasheets; kgf·m appears in legacy metric documentation. Display symbol is N·m — never the abbreviation "nm", which denotes nanometre.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).

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