CONVERSION · EN

N·m to lb-ft (lbf·ft)

Convert torque from newton metres (N·m) to pound-force feet (lbf·ft / lb-ft) with sourced conversion factors.

Guide

Formula

lbf·ft = N·m ÷ 1.3558179483314…

The newton metre is used here as a unit of torque, not energy. The lbf·ft result uses pound-force and the international foot according to the catalogue conversion factors.

Note : For real tightening work, the manufacturer-specified torque remains the reference; this page does not provide mechanical recommendations.

Example : 35 N·m

Common conversions

Display rounded to at most 6 decimal places.

N·m	lbf·ft
1	0.737562
10	7.375621
20	14.751243
35	25.814675
50	36.878107
100	73.756215
200	147.51243

Definition sources

National Institute of Standards and Technology — NIST Guide to the SI, Appendix B.8 — Factors for Units Listed Alphabetically

Measurement

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Approximate fraction

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Fractions and precision

Inch fractionMaximum approximation error, in mm

Step	Fraction	Error in mm	Limit

Error = approximate fraction − requested measurement. Exact comparison before display rounding.

A list

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