About this converter
Power measures the rate of doing work or transferring energy. Watt (W) is the SI unit, 1 kilowatt equals 1,000 W, 1 mechanical horsepower equals about 745.699872 W, and 1 W equals 3.412141633 BTU/hr.
This converter supports electrical, mechanical, thermal, RF, and CGS power units. Electrical engineers, HVAC designers, RF technicians, mechanics, energy analysts, and physics students use power conversions for motor ratings, heater loads, signal levels, equipment specs, and energy calculations.
How to Use This Converter
- Enter the power value.
- Select the source unit from the From menu.
- Select the target unit from the To menu.
- Read the converted result and formula line.
- Use Swap to reverse the selected units.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Watt | W | SI power, electrical loads, and physics equations. |
| Kilowatt | kW | Motors, heaters, appliances, and utility-scale power. |
| Megawatt | MW | Large generators, plants, and grid-scale ratings. |
| Mechanical horsepower | hp | Engines, motors, pumps, and mechanical equipment. |
| BTU per hour | BTU/hr | HVAC capacity, heating, and cooling equipment. |
| Kilocalorie per hour | kcal/h | Thermal systems and food-energy rate calculations. |
| Decibel-milliwatt | dBm | RF signal power, telecom, and electronics measurements. |
| Milliwatt | mW | Small electronics, sensors, lasers, and RF devices. |
| Foot-pound per minute | ft-lb/min | Mechanical work rate in imperial references. |
| Erg per second | erg/s | CGS scientific power values and legacy physics data. |
kW to Horsepower Conversion Table
| From | To |
|---|---|
| 0.1 kW | 0.134102 hp |
| 0.5 kW | 0.670511 hp |
| 1 kW | 1.34102 hp |
| 2 kW | 2.68204 hp |
| 5 kW | 6.70511 hp |
| 10 kW | 13.4102 hp |
| 25 kW | 33.5256 hp |
| 50 kW | 67.0511 hp |
| 100 kW | 134.102 hp |
| 250 kW | 335.256 hp |
How to Convert kW to Horsepower
Kilowatts to mechanical horsepower
For example, 75 kW x 1.3410221 = 100.577 hp.
Mechanical horsepower to kilowatts
For example, 150 hp / 1.3410221 = 111.855 kW.
When You Need to Convert Power
Motor and engine specs often mix kilowatts and horsepower. A 100 kW electric motor equals 134.102 mechanical horsepower, which helps buyers compare electric and combustion equipment ratings.
HVAC systems commonly use BTU/hr while electrical load calculations use watts or kilowatts. A 12,000 BTU/hr air conditioner is about 3.51685 kW of thermal power.
RF and electronics work uses dBm for small signal levels and watts for physical power. A 30 dBm transmitter output equals 1 W, while 0 dBm equals 1 mW.