Calculating your power is straightforward once you know the Power from Torque and RPM formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Power from Torque and RPM Calculator.
What is Power from Torque and RPM?
The Power from Torque and RPM calculation tells you your power from a few simple inputs. The figure you are solving for here is the power.
The Power from Torque and RPM formula
The core formula is:
Power = Torque × Rotational speed × 2 × 3.141592653589793 ÷ 60Here is what each input means:
- Torque — a value measured in N·m. Example: 50 N·m.
- Rotational speed — a value measured in RPM. Example: 3,000 RPM.
How to calculate it step by step
- Write down the torque (for example, 50 N·m).
- Write down the rotational speed (for example, 3,000 RPM).
- Apply the formula above to get your power.
- Double-check the result with the Power from Torque and RPM Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Torque | 50 N·m |
| Rotational speed | 3,000 RPM |
| Power | 15,707.96 |
| In kilowatts | 15.708 |
With torque of 50 N·m and rotational speed of 3,000 RPM, the power works out to 15,707.96.
Example 2
With torque of 100 N·m and rotational speed of 3,000 RPM, the power works out to 31,415.93.
| Result | Value |
|---|---|
| Power | 31,415.93 |
| In kilowatts | 31.416 |
Example 3
With torque of 25 N·m and rotational speed of 3,000 RPM, the power works out to 7,853.98.
| Result | Value |
|---|---|
| Power | 7,853.98 |
| In kilowatts | 7.854 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Power from Torque and RPM Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring science calculators with these tools: Impulse Calculator, Elastic Potential Energy Calculator, Thermal Expansion Calculator, Buoyancy Force Calculator, RPM to Linear Speed Calculator.