Horsepower (hp)
What Horsepower Means (Quickly)
Horsepower tells you how quickly an engine can do work. Use it to compare car engines, electric motors, and tools by converting HP into watts and kilowatts.
Quick examples
- 1 hp = 745.7 watts (about 0.746 kW)
- 100 hp is about 74.6 kW
- 150 hp is about 111.9 kW
Use this term to
- Compare engine and motor output consistently
- Convert power between HP, watts, and kilowatts
- Read product specs with less confusion
Key clarifications
Is horsepower a unit of force?
No. Horsepower is a unit of power (work per unit time), not force.
What is the difference between mechanical and metric horsepower?
Mechanical horsepower is 745.7 W, while metric horsepower (PS) is 735.5 W.
Can two engines with the same horsepower feel different?
Yes. Torque curve, gearing, and vehicle weight can change real-world performance.
How this was calculated (methodology)
This page uses standard domain definitions and baseline assumptions to explain the concept quickly. Treat it as an educational reference, then validate against your specific numbers before making decisions.
Concept meter
Power-output comparison confidence
Related Units Terms
Expand your understanding with related concepts
Acceleration
The rate of change of velocity per unit of time.
Acre
A unit of land area used in the imperial and US customary systems.
Ampere (Amp)
The base unit of electric current in the International System of Units (SI).
Bar (Unit)
A metric unit of pressure, but not part of the International System of Units (SI).
Bit
The basic unit of information in computing and digital communications.
This software is for simulation and planning purposes only. Outputs are estimates based on your inputs and do not constitute professional financial, legal, or tax advice. Always consult a qualified advisor before making business decisions.