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Conversions

Torque Converter

Convert between newton-metre, pound-foot, kilogram-force metre, dyne-centimetre, and more torque units instantly.

What is Torque Converter?

A torque converter lets you switch between units of torque — the rotational equivalent of linear force. The SI unit is the newton-metre (N·m), used in engineering and automotive specifications. Pound-foot (lbf·ft) is common in US automotive, while kilogram-force metre (kgf·m) appears in older European and Asian standards.

How to use

  1. 1 Enter the torque value in the Value field.
  2. 2 Select the unit you are converting from in the From dropdown.
  3. 3 Select the unit you want to convert to in the To dropdown.
  4. 4 The result and a full table of all equivalent torques appear instantly.
  5. 5 Click the swap button to reverse the conversion.

Formula

converted = input_value * (factor_of_from_unit / factor_of_to_unit), where all factors are expressed relative to newton-metres

Example calculation

To convert 100 lbf·ft to N·m: 100 × 1.35582 = 135.58 N·m. To convert back: 135.58 / 1.35582 = 100 lbf·ft.

Frequently asked questions

What is the difference between N·m and lbf·ft?

Newton-metre (N·m) is the SI unit of torque; pound-foot (lbf·ft) is the imperial unit. 1 lbf·ft = 1.35582 N·m. Car engine torque specs in the US use lbf·ft; European specs use N·m.

Why is torque measured in N·m and energy also in joules (which equal N·m)?

The units are dimensionally the same but conceptually different. Torque is a vector (force × perpendicular distance), while energy (joules) is a scalar. They should not be freely interchanged even though 1 J = 1 N·m.

What is a dyne-centimetre?

A dyne-centimetre (dyn·cm) is the CGS unit of torque, equal to 10⁻⁷ N·m. It appears in older physics literature and some precision instrument specifications.

How do I convert kgf·m to N·m?

Multiply kgf·m by 9.80665 to get N·m. For example, 10 kgf·m × 9.80665 = 98.07 N·m. This factor comes from standard gravity (9.80665 m/s²).

What is a typical engine torque?

A family sedan engine produces roughly 150–300 N·m (110–220 lbf·ft). High-performance sports cars reach 400–700 N·m, and heavy trucks can exceed 2000 N·m.