Torque N·m to ft·lb Converter

Torque N·m to ft·lb Converter

This converter changes torque between newton-metres (N·m) and foot-pounds (ft·lb) in both directions. It is most useful for following a torque spec — for example tightening wheel nuts or engine bolts — when your wrench and the manual use different units.

Why this unit mismatch is so common

European and Asian vehicle manufacturers typically publish torque specifications in newton-metres (the SI unit), while older American publications, many torque wrenches, and US-market service manuals often use foot-pounds. A mechanic working on a Japanese engine with a US-market torque wrench runs into this constantly. Getting the conversion wrong — or skipping it and guessing — risks under-torqued fasteners that loosen over time or over-torqued bolts that stretch, strip, or crack.

How it works

One foot-pound equals exactly 1.3558179483314 newton-metres, so the conversion is a fixed factor applied either way:

ft·lb = N·m ÷ 1.3558179483314
N·m   = ft·lb × 1.3558179483314

Type a value in either field and the other updates instantly. Note that for torque, “foot-pound” (ft·lb) and “pound-foot” (lb·ft) are the same unit — the names are used interchangeably in practice.

Common torque specs and their conversions

These are illustrative typical ranges — always follow the specific torque value in your vehicle’s service manual.

Full reference table

Practical tips

• Direction matters: always note whether the manual lists N·m or ft·lb before converting — converting in the wrong direction gives a wildly different number.
• ft·lb vs. in·lb: some smaller fastener specs are given in inch-pounds (in·lb), not foot-pounds. To convert in·lb to N·m, multiply by 0.11298. This converter handles ft·lb only.
• Calibration: even after a correct unit conversion, a torque wrench needs periodic calibration to read accurately. A 5% drift is common with heavy use.

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