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Torque, rotational speed and power

Calculate the mechanical power of a rotating shaft from its torque and rotational speed.

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01

Your inputs

The starting values are an example.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

P = M × ω; ω = 2π × rpm/60

Worked example

10 N·m at 3,000 rpm produces approximately 3.1416 kW of mechanical power.

Things to check

  • The speed is first converted from revolutions per minute to radians per second.
  • Losses must be considered separately when comparing the input and output of a gearbox.