Power Conversion Calculator

Advanced Power Conversion Calculator

Power Conversion Calculator

Convert between different power units with precision

Power Conversion

Power Unit Information:

1 Watt = 1 Joule/second | 1 kW = 1000 Watts | 1 hp = 745.7 Watts

Learn more about power units

Conversion Results

100 W = 0.1 kW
Unit Value Equivalent To
Watts (W) 100.0000 1.0000 W
Kilowatts (kW) 0.1000 1000.0000 W
Horsepower (hp) 0.1341 745.7000 W

Base Unit

Watts (W)

Conversion Factor

0.0010

Precision

4 decimals

Scientific Notation

Disabled

Common Power Conversions:

1 kW = 1.341 hp | 1 hp = 0.7457 kW | 1 BTU/h = 0.2931 W

View all conversion factors




A Power Conversion Calculator is a digital or physical tool that converts power measurements between different units, such as watts (W), kilowatts (kW), horsepower (hp), and more. It is widely used in electrical engineering, mechanical systems, automotive industries, and energy management to ensure accurate power unit conversions. 

Key Power Units & Their Conversions 


Power is the rate at which energy is transferred or converted. The most commonly used power units include: 

1. Watts (W) 

  • The SI unit of power. 
  • 1 W = 1 joule per second (J/s). 
  • Common in small-scale electrical devices. 

2. Kilowatts (kW) 

  • 1 kW = 1,000 W. 
  • Used for household appliances, motors, and power generation. 

3. Megawatts (MW) 

  • 1 MW = 1,000 kW = 1,000,000 W. 
  • Used in power plants, large industrial machines, and grid systems. 

4. Horsepower (hp) 

  Mechanical Horsepower (imperial): 
  • 1 hp ≈ 745.7 W 
  • Used in automotive engines and machinery. 

 Metric Horsepower (PS): 

  • 1 PS ≈ 735.5 W 
  • Common in European automotive specifications. 

5. British Thermal Units per Hour (BTU/hr) 

  • 1 BTU/hr ≈ 0.293 W 
  • Used in heating, ventilation, and air conditioning (HVAC) systems. 

6. Foot-Pounds per Second (ft-lb/s) 

  • 1 ft-lb/s ≈ 1.356 W 
  • Used in mechanical and rotational power measurements. 



Example Conversion: 

  • Input: 5 kW 
  • Convert to: Horsepower (hp) 
  • Calculation: 

                                   5   kW = 5 , 000   W 

                       5 , 000   W ÷ 745.7   (W/hp) ≈ 6.705   hp 


  • Output: 6.705 hp