Engine Horsepower Calculator
Calculate engine horsepower from torque and RPM. Get results in HP and kilowatts using the metric formula.
How to Use the Engine Horsepower Calculator
- Enter the known physical values in the corresponding fields.
- Select the appropriate units if multiple options are available.
- The unknown value is computed instantly from the formula.
- Review the result and the formula explanation below.
クイックリファレンス
| 変換元 | 変換先 |
|---|---|
| Speed of light | 299,792,458 m/s |
| Gravity (g) | 9.807 m/s² |
| Avogadro's number | 6.022 × 10²³ |
| Boltzmann const. | 1.38 × 10⁻²³ J/K |
| Elementary charge | 1.602 × 10⁻¹⁹ C |
| Planck's const. | 6.626 × 10⁻³⁴ J·s |
使用例
- •Solving physics homework or exam problems with the correct formula.
- •Verifying experimental measurements and calculations in the lab.
- •Understanding physical relationships between quantities.
- •Quick engineering calculations for design or estimation.
計算式
HP = Torque (Nm) × RPM / 7121. kW = HP × 0.7457.
よくある質問
How to use?
Enter the data and click the calculate button.
Why divide by 7121?
The constant 7121 converts from Newton-meters and RPM to metric horsepower. For imperial (ft·lbf), use 5252 instead.
What is the difference between HP and kW?
Horsepower (HP) and kilowatts (kW) both measure power. 1 HP equals approximately 0.7457 kW.
Is it free?
Yes, all calculators are completely free.