Convert between watts, kilowatts, horsepower, BTU per hour, and foot-pounds per second. Useful for comparing engines, motors, and electrical equipment.
Watts
111,855 W
Kilowatts
111.855 kW
Horsepower
150 hp
BTU/hour
381,666.5 BTU/h
Foot-pounds/sec
82,499.89 ft·lb/s
111,855 W
TV
120 W
×932
Refrigerator
150 W
×745
Microwave
1 kW
×111
Dryer
5 kW
×22
EV Charger
7.2 kW
×15
Hot Tub
15 kW
×7
1 hour
$17.90
8 hours
$143
1 day
$430
30 days
$12.9k
1 year
$156.8k
Based on US average $0.16/kWh
Power measures the rate at which energy is transferred or converted. Watts and kilowatts are the SI standard used for electrical equipment worldwide. Horsepower is traditionally used for engines and motors. BTU per hour is common in US heating and cooling systems. This converter handles all major power units to help you compare equipment across different measurement systems.
One mechanical horsepower equals approximately 745.7 watts or 0.7457 kilowatts. This conversion is commonly used when comparing electric motors to gasoline engines. A 150 HP car engine produces about 112 kW.
One kilowatt (kW) equals 1,000 watts (W). Watts measure the rate of energy transfer. A typical household light bulb uses 60-100 watts, while a clothes dryer uses about 5,000 watts (5 kW).
Multiply the BTU/h value by 0.29307. For example, a 12,000 BTU/h air conditioner equals about 3,517 watts or 3.5 kW. BTU/h is commonly used in the US to rate heating and cooling equipment.
Energy Converter
Convert between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, and BTUs. Useful for science, nutrition, and energy cost comparisons.
Electricity Cost Calculator
Calculate how much it costs to run any appliance or device. Enter wattage, usage hours, and your electricity rate to see daily, monthly, and yearly costs.