Kilowatt-hour

kWh

Common unit for electrical energy billing

About Kilowatt-hour (kWh)

The standard billing unit for household electricity worldwide, one kilowatt-hour equals 3.6 megajoules. Running a 100-watt light bulb for 10 hours consumes one kWh. Average US household electricity consumption is about 30 kWh per day, and electric vehicle batteries hold 40-100 kWh.

Category
Energy
Symbol
kWh
Also known as
kilowatt-hours kilowatt hours kW·h
01

CONVERT TO

Joule J Kilojoule kJ Megajoule MJ Calorie (thermochemical) cal Kilocalorie kcal Watt-hour Wh British Thermal Unit BTU Electronvolt eV Therm thm Foot-pound ft·lbf

Frequently Asked Questions

What is a Kilowatt-hour (kWh)?

Common unit for electrical energy billing

How many Joule (J) are in one Kilowatt-hour (kWh)?

One Kilowatt-hour (kWh) equals 3,600,000 Joule (J).

How many Kilocalorie (kcal) are in one Kilowatt-hour (kWh)?

One Kilowatt-hour (kWh) equals 860.4207 Kilocalorie (kcal).

How many Kilojoule (kJ) are in one Kilowatt-hour (kWh)?

One Kilowatt-hour (kWh) equals 3,600 Kilojoule (kJ).

How do I convert Kilowatt-hour to Joule?

To convert Kilowatt-hour to Joule, multiply the value by 3,600,000 (1 kWh = 3,600,000 J).