Power Converter
Convert watts, hp, kW.
Input
Result
What is a Power Converter?
A Power Converter is a free online tool that converts power measurements between watts (W), kilowatts (kW), megawatts (MW), and horsepower (hp). It is useful for automotive, engineering, electrical, and mechanical applications.
How to calculate power conversion manually (the formula)
Power conversion uses fixed conversion factors. To convert watts to kilowatts, divide by 1,000. To convert horsepower to watts, multiply by 745.7. To convert kW to hp, multiply by 1.34102. To convert MW to kW, multiply by 1,000.
Example calculation
Convert 150 hp to watts: 150 × 745.7 = 111,855 W. Convert 50 kW to hp: 50 × 1.34102 = 67.051 hp. Convert 2 MW to kW: 2 × 1,000 = 2,000 kW.
Common mistakes
- Confusing mechanical hp with metric hp — Mechanical hp (745.7 W) differs from metric PS (735.5 W). Using the wrong conversion gives a small but meaningful error.
- Forgetting the kilowatt-to-watt factor — One kW is 1,000 W, not 100 W. A common slip is using 100 instead of 1,000.
- Mixing up power and energy units — Watts measure power (rate of energy use), while watt-hours measure energy. They are different quantities.
Frequently asked questions
What is a Power Converter?
A Power Converter is a tool that converts power measurements between units such as watts, kilowatts, horsepower, and megawatts.
How do I convert horsepower to watts?
One mechanical horsepower equals 745.7 watts. To convert hp to watts, multiply by 745.7.
What is the formula for converting kW to hp?
To convert kilowatts to horsepower, multiply the power in kW by 1.34102. For example, 10 kW × 1.34102 = 13.4102 hp.
How many watts are in one kilowatt?
One kilowatt (kW) equals 1,000 watts (W).
What is the difference between mechanical and metric horsepower?
Mechanical horsepower (hp) equals 745.7 W, while metric horsepower (PS) equals 735.5 W. The difference is about 1.4%.