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Inch-Pounds to Newton-Meters Converter

Convert torque from inch-pounds (lbf·in) to newton meters (N·m), with foot-pounds and other torque units alongside.

What this tool does

Convert torque from inch-pounds (lbf·in) to newton meters (N·m), with foot-pounds and other torque units alongside. Type an amount in pound-force inches, choose the units, and the tool converts it to newton meters. It offers 5 torque units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Pound-force inch, Newton meter, Pound-force foot, Ounce-force inch, Kilogram-force centimeter. Starts as Pound-force inch.
  • To: Choose one of the same 5 units as "From". Starts as Newton meter.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from pound-force inches to newton meters:

  • 1 lbf·in ≈ 0.112985 N·m
  • 5 lbf·in ≈ 0.564924 N·m
  • 10 lbf·in ≈ 1.129848 N·m
  • 50 lbf·in ≈ 5.649241 N·m
  • 100 lbf·in ≈ 11.298483 N·m

Multiply the number of pound-force inches by about 0.112985 to get newton meters. The factor follows from exact definitions. It has more digits than fit here, so it is shown rounded.

Sources: Pound-force inch: exact by definition. Newton meter: SI Brochure, 9th edition (2019).

Limitations

  • Converts a torque value from one unit to another. It does not work out the torque a bolt, engine or motor needs.
  • Always check the torque in the manufacturer's specification, and note which unit it is written in.

FAQs

Q: How many newton meters is one inch-pound?
A: One inch-pound is about 0.113 newton meter. Multiply inch-pounds by 0.113 for a close figure, or enter the value above for the full result.
Q: Which inch-pound does this use?
A: The pound-force inch (lbf·in), the inch-pound used in torque specifications.

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