Power Converter Online
Free online power converter. Convert between watts, kilowatts, horsepower, BTU/h, and more. Instant, precise results for engineering and everyday use.
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Tip: Click any result row to instantly copy its value to clipboard
💡 Definition
Power Converter
- Power is the rate at which energy is transferred or converted.
- The SI unit is the watt (W).
- Common alternatives include horsepower (engines), kilowatts (electricity), and BTU/h (HVAC).
- This converter covers all major power units.
📖 How to use
Step by Step
- Enter a power value and choose your source unit from the Convert From dropdown
- All equivalent power values appear instantly in the results grid
- The source unit row is highlighted in purple for clarity
- Click any result row to copy that value to your clipboard
🎯 Use cases
When to use
- Converting engine horsepower to kilowatts
- Comparing appliance power consumption
- HVAC system BTU/h calculations
- Electrical engineering power analysis
Frequently Asked Questions
How many watts is 1 horsepower?▾
One mechanical horsepower equals approximately 745.7 watts. One metric horsepower (PS) equals approximately 735.5 watts. Car specs typically use metric HP in Europe and mechanical HP in the US.
What is the difference between kW and kWh?▾
Kilowatts (kW) measure power — the rate of energy use at any instant. Kilowatt-hours (kWh) measure energy — the total amount consumed over time. A 1 kW appliance running for 2 hours uses 2 kWh.
What is BTU/h?▾
BTU per hour measures heating or cooling power. One BTU/h equals approximately 0.293 watts. Air conditioner capacity is often rated in BTU/h (e.g., a 12,000 BTU/h unit is about 3.5 kW).