Watt-hour

Wh

Energy of 1 watt sustained for 1 hour

About Watt-hour (Wh)

One watt sustained for one hour equals 3,600 joules. The watt-hour is used for small-scale electrical energy measurements such as battery capacity in consumer electronics. A smartphone battery typically holds 10-20 Wh, and laptop batteries range from 40 to 100 Wh.

Category
Energy
Symbol
Wh
Also known as
watt-hours watt hours
01

CONVERT TO

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

Frequently Asked Questions

What is a Watt-hour (Wh)?

Energy of 1 watt sustained for 1 hour

How many Joule (J) are in one Watt-hour (Wh)?

One Watt-hour (Wh) equals 3,600 Joule (J).

How many Kilojoule (kJ) are in one Watt-hour (Wh)?

One Watt-hour (Wh) equals 3.6 Kilojoule (kJ).

How many Megajoule (MJ) are in one Watt-hour (Wh)?

One Watt-hour (Wh) equals 0.0036 Megajoule (MJ).

How do I convert Watt-hour to Joule?

To convert Watt-hour to Joule, multiply the value by 3,600 (1 Wh = 3,600 J).