Mechanical Power from Torque and Speed

What this tool does

Power is torque times angular velocity, and the factor 2π/60 is what turns revolutions per minute into radians per second. This is the calculation that links a motor's nameplate to what it can actually do at the shaft.

Formula

P = M × 2π × n ÷ 60

Variables

Worked example

Limitations

• Mixing units is the most common source of error. Convert every input to the units shown next to each field before calculating.
• The formula assumes ideal conditions: no friction losses, no air resistance and no efficiency losses unless you enter them.