ConverterHub

In-Pounds to Newton-Meters Converter

Enter a torque value and pick the conversion direction.

Result

13.5582 N·m

How it is calculated

The tool multiplies the number you enter by a fixed factor, chosen by the direction setting. For inch-pounds to newton-metres: N·m = in·lb × 0.112984829. For newton-metres to inch-pounds: in·lb = N·m × 8.8507457676. The input is a torque in the unit named by the direction, and the answer is printed with four decimals and the unit label. If the direction is anything other than the reverse option, the tool converts inch-pounds to newton-metres. The factors are not rounded before multiplying. Negative values are converted too and keep their sign. Foot-pounds are a different unit: 1 ft·lb is 12 in·lb.

Worked example

A fastener specification calls for 120 in·lb and your torque wrench reads newton-metres. Direction: inch-pounds to newton-metres. Multiply: 120 × 0.112984829 = 13.55817948, which the tool rounds to four decimals and shows as 13.5582 N·m. In the other direction, a 25 N·m setting converts to 25 × 8.8507457676 = 221.2686 in·lb. Always set the wrench to the converted number, then check the scale before tightening.

Try this example →

Common mistakes

  • Choosing the wrong direction. Picking N·m to in·lb for a value that is already in in·lb multiplies by 8.85 instead of 0.113 and gives a number nearly 80 times too large.
  • Confusing inch-pounds with foot-pounds. A spec of 120 in·lb is only 10 ft·lb, and entering 120 as if it were ft·lb overstates the torque twelvefold.
  • Treating N·m and newton-centimetres or kgf·cm as the same. This tool converts only between in·lb and N·m, so convert other units first.
  • Expecting the displayed four-decimal value to be exact. The wrench cannot be set that finely, so round to the resolution of the scale and stay on the specified value or just below it.
  • Applying a dry-thread torque value to lubricated threads. The conversion is only arithmetic and does not adjust the spec for friction.

About this calculator

Torque converts between inch-pounds and newton-meters with a fixed factor: 1 in-lb = 0.112985 N·m (and conversely 1 N·m ≈ 8.851 in-lb), since it's simply a unit-of-force times a unit-of-length conversion. This calculator applies that factor in either direction depending on which unit you're starting from.

Automotive and general mechanics use it constantly because torque wrenches and manufacturer spec sheets mix US customary (in-lb, ft-lb) and metric (N·m) units depending on the vehicle's origin, manufacturing and assembly technicians use it to convert torque specs on fastener schedules, and aerospace and mechanical engineers use it when a design standard in one unit system has to be cross-checked against hardware specified in the other.

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