Power Converter | Convert kW, HP, Watts, BTU/h, Calories
Free online power converter. Convert between kilowatts, horsepower, watts, BTU per hour, calories per second, tons of refrigeration. Accurate power measurement conversion tool.
Free Online Power Converter
Our power converter tool allows you to instantly convert between different units of power measurement. Whether you need to convert kilowatts to horsepower for automotive applications, watts to BTU per hour for HVAC systems, or calories per second for nutritional calculations, our tool provides accurate results in real-time.
Supported Power Units
Electrical & Mechanical
- Watt (W) SI base unit
- Kilowatt (kW) 1000 watts
- Horsepower (hp) 745.7 watts
- Metric HP (PS) 735.5 watts
Thermal & Cooling
- BTU per hour 0.293 watts
- Calorie per second 4.1868 watts
- Ton of Refrigeration 3.517 kW
- Foot-Pound per second 1.356 watts
How to Use the Power Converter
- Enter the value - Type the number you want to convert in the "Convert From" field
- Select "From" unit - Choose the unit you're converting from (e.g., kilowatts)
- Select "To" unit - Choose the unit you want to convert to (e.g., horsepower)
- Get instant results - The converted value appears automatically
- Use quick values - Click on common values like "1 hp" or "1000 W" for quick conversion
Common Power Conversion Examples
| Conversion | Formula | Example |
|---|---|---|
| Kilowatts to Horsepower | kW × 1.341 = hp | 100 kW = 134.1 hp |
| Horsepower to Kilowatts | hp × 0.7457 = kW | 150 hp = 111.855 kW |
| Watts to BTU per Hour | W × 3.412 = BTU/h | 1000 W = 3412 BTU/h |
| BTU per Hour to Watts | BTU/h × 0.293 = W | 10000 BTU/h = 2930.7 W |
| Metric to Mechanical HP | PS × 0.9863 = hp | 100 PS = 98.63 hp |
Practical Applications
🚗 Automotive Industry
Convert between kilowatts and horsepower for engine specifications, vehicle power ratings, and performance comparisons. Most European cars use kilowatts while American vehicles use horsepower.
🏠 HVAC & Refrigeration
Convert between tons of refrigeration, BTU per hour, and kilowatts for air conditioning and refrigeration system design. Essential for sizing equipment and calculating energy consumption.
⚡ Electrical Engineering
Convert between watts, kilowatts, megawatts for power generation, transmission, and electrical system design. Used for solar panel arrays, wind turbines, and electrical grid planning.
🏋️ Fitness & Nutrition
Convert between calories per second and watts for exercise equipment and metabolic rate calculations. Useful for fitness equipment calibration and dietary energy calculations.
Power Measurement Systems
SI System (Watts)
The watt is the SI derived unit of power. It's defined as one joule per second and is used worldwide for scientific and engineering applications. All electrical power measurements are typically expressed in watts or its multiples.
- International standard for power measurement
- Used in electrical engineering and physics
- Multiples: milliwatt (mW), kilowatt (kW), megawatt (MW), gigawatt (GW)
- Base unit for all power calculations
Imperial System
The imperial system uses horsepower as the primary unit of mechanical power. Other units include BTU per hour for thermal power and foot-pounds per minute for mechanical work rate.
- Horsepower commonly used for engines and motors
- BTU per hour used for heating and cooling systems
- Foot-pound units for mechanical work
- Still widely used in the United States
💡 Conversion Tips
- Quick kW to hp: Multiply kilowatts by 1.34 to get horsepower
- Quick hp to kW: Multiply horsepower by 0.746 to get kilowatts
- Quick W to BTU/h: Multiply watts by 3.41 to get BTU per hour
- Quick ton to kW: Multiply tons of refrigeration by 3.52 to get kilowatts
- For precise calculations, always use our converter tool
Start Converting Now!
Try our power converter with these common conversions: