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Force and Torque

lbf·fttokgf·m

Convert pound-force feet (lbf·ft) to kilograms-force metre (kgf·m).

Factor1 lbf·ft = 0.138255 kgf·m

Converter

lbf·ft

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

Result
13.8255kgf·m

Rendered to 6 significant figures.

Formula

Formula
kgf·m = lbf·ft × 0.138255

Multiply any value in pound-force feet by 0.138255 to obtain the value in kilograms-force metre.

Worked example

Convert 100 lbf·ft to kgf·m.

  1. 01Start with 100 lbf·ft.
  2. 02Multiply by the conversion factor: 100 × 0.138255 = 13.8255 kgf·m.
Result100 lbf·ft = 13.8255 kgf·m

Conversion table

lbf·ftkgf·m
10.13825
20.27651
50.69127
101.3825
202.7651
506.9127
10013.825
20027.651
50069.127
1000138.25

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lbf·ft to kgf·m?
1 lbf·ft equals 0.138255 kgf·m. To convert, multiply the value in pound-force feet by 0.138255.
How do I convert 1 lbf·ft to kgf·m?
1 lbf·ft = 0.138255 kgf·m. For any value, multiply by 0.138255.
How do I convert kgf·m back to lbf·ft?
Divide by the same factor — or equivalently, multiply by 7.233014. So 1 kgf·m = 7.23301 lbf·ft.
When would I need to convert pound-force foot to kilogram-force metre?
Torque conversions between lbf·ft and kgf·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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