English
العربية
Deutsch
Español
Français
Italiano
Português
Русский
Türkçe
Tiếng Việt
Power Converter - Convert Between Watt, kW, HP, BTU/h Online Free
Convert between watts, kilowatts, megawatts, horsepower, and BTU/h.
What Is a Power Converter?
A power converter converts between different power measurement units.
Supported Units
- Watt (W) — SI unit. 1 W = 1 J/s.
- Kilowatt (kW) — 1000 W. Household electricity.
- Megawatt (MW) — 1,000,000 W. Power plants.
- Horsepower (HP) — 745.7 W (mech). Engines.
- BTU/h — Heating/cooling capacity.
How Does Power Converter Work?
1 kW = 1000 W. 1 HP = 745.7 W. 1 BTU/h = 0.29307 W.
How to Use This Tool
- Enter a numeric value — Type the measurement you want to convert.
- Select the source unit — Choose the unit you are converting from.
- Read the results — The tool instantly displays equivalents in every supported unit.
Try our Energy Converter or Current Converter.
Use Cases
Engineering
Convert motor/generator specs.
Automotive
Compare engine power internationally.
HVAC
Size heating/cooling systems.
Related Tools
- Energy Converter - J, cal, kWh, BTU.
- Current Converter - A, mA, kA.
- Pressure Converter - Pa, bar, psi, atm.
Privacy
All calculations are performed entirely in your browser using JavaScript. No data is sent to our servers. We do not store, log, or share any values you enter.
Uses mechanical HP (745.7 W). Metric HP (PS) = 735.5 W.
AI Overview
A power converter converts between W, kW, MW, HP, and BTU/h.
Quick Answers
1 HP in watts?
A:745.7 W (mechanical).
1 kW in BTU/h?
A:~3412.
100 HP in kW?
A:~74.57 kW.
How to Use the Power Converter - Convert Between Watt, kW, HP, BTU/h Online Free
- Type the power value you want to convert into the input field. Decimals and large numbers are supported.
- Choose your starting unit from the dropdown menu - for example watts (W), kilowatts (kW), or megawatts (MW).
- See the value converted into every supported unit instantly, including milliwatts, or gigawatts.
Benefits
- Instant Multi-Unit Conversion
- Multiple Unit Systems
- 100% Free to Use
- Works on Any Device
Common Mistakes
- Mechanical HP (745.7 W) vs metric HP (735.5 W)
- 1 kW = 1000 W not 100
- Power (W) vs energy (Wh) are different
- BTU/h is thermal, not electrical
Professional Tips
- US outlet: ~1.8 kW (120V x 15A)
- Car engine: 100-300 HP (75-225 kW)
- Hair dryer: ~1500 W = 5100 BTU/h
- 1 kW electrical heat = 3412 BTU/h
Common Use Cases
Engineering
Convert motor/generator specs.
Automotive
Compare engine power.
HVAC
Size heating/cooling.
Home
Understand appliance power.
Related Concepts
Watt (W)
SI unit. 1 W = 1 J/s.
Kilowatt (kW)
1000 W. Household electricity.
Megawatt (MW)
1,000,000 W. Power plants.
Horsepower (HP)
745.7 W (mech). Engines.
BTU/h
Heating/cooling capacity.
Frequently Asked Questions
References
Popular Related Tools
More Unit Converters
Explore our complete collection of unit converters.
