Horsepower Calculator

Estimate engine horsepower (HP) from torque and RPM or from quarter-mile elapsed time and trap speed.

How to use this calculator

1. Select mode.
2. Enter stats.
3. Read HP and kW.

Formula & method

Power Formula

HP = Torque × RPM / 5252

Mechanical power.

Example

350 lb-ft at 5252 RPM = 350 HP.

Key insights

• HP and torque cross at 5,252 RPM.

How to interpret your result

Horsepower

Engine power output.

Frequently asked questions

1 HP to kW?

0.7457 kW.

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