Convert kWh to joules
Input the number of kilowatt-hours you want to convert to joules.
How to Convert Kilowatt-hours to Joules
The kilowatt-hour and joule are both units of energy. By definition, 1 kilowatt-hour equals exactly 3600000 joules. This means to convert kilowatt-hours to joules, you multiply by 3600000.
Formula
Step-by-Step Example
Convert 5 kWh to joules:
We need to convert kilowatt-hours to joules
Since 1 kWh = 3600000 J, multiply by 3600000
5 × 3600000 = 18000000
5 kWh = 18000000 J
Kilowatt-hour to Joule Conversion Table
Quick reference table for common kilowatt-hour to joule conversions. Click any value for detailed calculation.
| Kilowatt-hours (kWh) | Joules (J) |
|---|---|
| 0.1 kWh | 360000 J |
| 0.5 kWh | 1800000 J |
| 1 kWh | 3600000 J |
| 2 kWh | 7200000 J |
| 5 kWh | 18000000 J |
| 10 kWh | 36000000 J |
| 25 kWh | 90000000 J |
| 50 kWh | 180000000 J |
| 100 kWh | 360000000 J |
About These Units
Kilowatt-hour (kWh)
A kilowatt-hour (kWh) is the standard unit for electricity billing, equal to 1,000 watt-hours or 3.6 megajoules. Average US home uses 900 kWh monthly. Running a 100W bulb for 10 hours uses 1 kWh. Electricity costs $0.10-0.30 per kWh typically.
Joule (J)
The joule (J) is the SI unit of energy equal to one watt-second or one newton-meter. Joules measure work, heat, and electrical energy. One joule equals approximately 0.239 calories. Lifting a 100g apple one meter requires about 1 joule. Named after physicist James Prescott Joule.
Frequently Asked Questions
How do I convert kilowatt-hours to joules?
To convert kilowatt-hours to joules, multiply the value by 3600000. For example, 10 kWh = 36000000 J.
How many joules are in 1 kilowatt-hour?
1 kilowatt-hour equals 3600000 joules.
What is the formula for kilowatt-hours to joules?
The formula is: J = kWh × 3600000.