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Force and Torque

lbf·fttoN·m

Convert pound-force feet (lbf·ft) to newton-metres (N·m).

Factor1 lbf·ft = 1.355818 N·m

Converter

lbf·ft

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

Result
135.582N·m

Rendered to 6 significant figures.

Formula

Formula
N·m = lbf·ft × 1.355818

Multiply any value in pound-force feet by 1.355818 to obtain the value in newton-metres.

Worked example

Convert 100 lbf·ft to N·m.

  1. 01Start with 100 lbf·ft.
  2. 02Multiply by the conversion factor: 100 × 1.355818 = 135.582 N·m.
Result100 lbf·ft = 135.582 N·m

Conversion table

lbf·ftN·m
11.3558
22.7116
56.7791
1013.558
2027.116
5067.791
100135.58
200271.16
500677.91
10001355.8

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lbf·ft to N·m?
1 lbf·ft equals 1.355818 N·m. To convert, multiply the value in pound-force feet by 1.355818.
How do I convert 1 lbf·ft to N·m?
1 lbf·ft = 1.35582 N·m. For any value, multiply by 1.355818.
How do I convert N·m back to lbf·ft?
Divide by the same factor — or equivalently, multiply by 0.7375621. So 1 N·m = 0.737562 lbf·ft.
When would I need to convert pound-force foot to newton-metre?
Torque conversions between lbf·ft and N·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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