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Force and Torque

lbf·fttomN·m

Convert pound-force feet (lbf·ft) to millinewton-metres (mN·m).

Factor1 lbf·ft = 1355.818 mN·m

Converter

lbf·ft

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

Result
1355.82mN·m

Rendered to 6 significant figures.

Formula

Formula
mN·m = lbf·ft × 1355.818

Multiply any value in pound-force feet by 1355.818 to obtain the value in millinewton-metres.

Worked example

Convert 1 lbf·ft to mN·m.

  1. 01Start with 1 lbf·ft.
  2. 02Multiply by the conversion factor: 1 × 1355.818 = 1355.82 mN·m.
Result1 lbf·ft = 1355.82 mN·m

Conversion table

lbf·ftmN·m
11355.8
22711.6
56779.1
1013558
2027116
5067791
1001.3558e+5
2002.7116e+5
5006.7791e+5
10001.3558e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from lbf·ft to mN·m?
1 lbf·ft equals 1355.818 mN·m. To convert, multiply the value in pound-force feet by 1355.818.
How do I convert 1 lbf·ft to mN·m?
1 lbf·ft = 1355.82 mN·m. For any value, multiply by 1355.818.
How do I convert mN·m back to lbf·ft?
Divide by the same factor — or equivalently, multiply by 0.0007375621. So 1 mN·m = 0.000737562 lbf·ft.
When would I need to convert pound-force foot to millinewton-metre?
Torque conversions between lbf·ft and mN·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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