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Moment of Force Converter (N·m / dyn·cm / lbf·ft / kgf·m)

· Last updated：2026-08-02

Convert moment of force (torque) between newton-metre (N·m, SI base), dyne-centimetre (dyn·cm, CGS = 10⁻⁷ N·m), pound-foot (lbf·ft = 1.3558179483314004 N·m), and kilogram-force-metre (kgf·m = 9.80665 N·m). Each factor is the exact product of the matching force factor and length factor. Converts via N·m to the target unit and lists all four equivalents. Reference: wheel-nut tightening torque ≈ 100 N·m, passenger-car engine peak torque ≈ 250 N·m.

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Written by the Elysia Tools team

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Math & Numbers
Input types
select, number
Output type
json
Sample coverage
4
API ready
Yes

Overview

Convert moment of force or torque between N·m, dyn·cm, lbf·ft, and kgf·m. Enter a value, choose the input and output units, set the decimal places, and receive the selected conversion plus all four equivalent values.

When to use

  • Convert automotive wheel-nut torque from N·m to lbf·ft or kgf·m.
  • Translate torque values between SI, CGS, and force-based engineering units.
  • Check small theoretical physics values such as dyn·cm in N·m.

How it works

  1. 1Enter the moment of force value, including negative values for an opposite direction such as counterclockwise torque.
  2. 2Select the input unit: N·m, dyn·cm, lbf·ft, or kgf·m.
  3. 3Choose the output unit and specify between 0 and 10 decimal places.
  4. 4The converter calculates through N·m and returns the selected result together with equivalents in all four units.

Use cases

  • Automotive maintenance technicians converting wheel-nut tightening specifications.
  • Mechanical engineers comparing torque values across SI, CGS, and imperial units.
  • Physics students and researchers converting small CGS moment-of-force measurements.

Examples

1. Wheel-nut torque conversion

Automotive technician

Background

A service manual specifies a wheel-nut tightening torque of approximately 100 N·m, while the technician's torque wrench uses lbf·ft.

Problem

Convert the specification accurately to lbf·ft while checking equivalent values in other units.

How to use

Enter 100 as the value, select N·m as the input unit, choose lbf·ft as the output unit, and set 7 decimal places.

inputUnit: N·m; value: 100; outputUnit: lbf·ft; decimalPlaces: 7

Outcome

The selected result is 73.7562149 lbf·ft. The tool also lists 100 N·m, 1,000,000,000 dyn·cm, and 10.1971621 kgf·m.

2. CGS moment conversion

Physics student

Background

A theoretical physics calculation gives a moment of force of 1 dyn·cm in the CGS system.

Problem

Express the value in SI units without manually applying the CGS conversion factor.

How to use

Enter 1 as the value, select dyn·cm as the input unit, choose N·m as the output unit, and set 10 decimal places.

FAQ

Which torque units does this converter support?

It supports N·m, dyn·cm, lbf·ft, and kgf·m.

What is 100 N·m in lbf·ft?

100 N·m is approximately 73.7562149 lbf·ft.

What is the relationship between dyn·cm and N·m?

1 dyn·cm equals 0.0000001 N·m, or 10⁻⁷ N·m.

Can I enter a negative torque value?

Yes. Negative values can represent an opposite direction, such as counterclockwise or loosening torque.

How many decimal places can I display?

You can choose from 0 to 10 decimal places.

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inputUnit: dyn·cm; value: 1; outputUnit: N·m; decimalPlaces: 10

Outcome

The result is 0.0000001 N·m. Equivalent values are also provided for dyn·cm, lbf·ft, and kgf·m.