Kilowatt-hour to Joule
Instantly convert Kilowatt-hour (kWh) to Joule (J). Free online converter with accurate results.
kWh
Joule (J)
J
J = kWh × 3.60000e+6
Quick Reference: Kilowatt-hour to Joule
| kWh | J |
|---|---|
| 0.1 | 360,000 |
| 0.5 | 1,800,000 |
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 5 | 18,000,000 |
| 10 | 36,000,000 |
How to Convert Kilowatt-hour to Joule
Formula:
J = kWh × 3.60000e+6
Example:
1 kWh = 3,600,000 J
- Enter the value in Kilowatt-hour you want to convert
- The result is calculated automatically
- Copy your result in Joule or continue converting
About Kilowatt-hour and Joule
Kilowatt-hours (kWh) measure electrical energy consumption, while joules are the SI unit for energy. One kWh equals exactly 3,600,000 joules (3.6 megajoules).
Common Uses for This Conversion
Understanding electricity bills, calculating energy costs, comparing appliance efficiency, and industrial energy planning.
💡Did You Know?
One kWh can power a 100-watt light bulb for 10 hours, run a laptop for about 8 hours, or heat water for roughly 3 cups of coffee. The average US home uses about 30 kWh per day.
Frequently Asked Questions
1 kilowatt-hour (kWh) = exactly 3,600,000 joules (3.6 MJ). Formula: 1 kWh = 1,000 W × 3,600 s = 3,600,000 J. One kWh is the energy used by a 1,000-watt appliance running for exactly one hour. The average US household uses about 30 kWh per day.
1 kWh = exactly 3,600 kJ. Kilojoules are used in scientific contexts and on European nutrition labels — EU food packaging shows both kcal and kJ. A typical 2,000 kcal daily diet equals about 8,368 kJ, approximately 2.32 kWh of food energy.
5 kWh = 18,000,000 joules (18 MJ). This is roughly the energy stored in a plug-in hybrid car battery (enough for about 25–30 km of electric-only range). It is also about what a typical laptop charger consumes running continuously for 100 hours.
1 kWh = exactly 3.6 MJ. Megajoules are used in engineering, thermodynamics, and industrial energy measurement. In Australia, residential natural gas is billed in MJ; appliances and hot water systems are rated in MJ/h. To convert any kWh value to MJ, multiply by 3.6.
0.5 kWh = 1,800,000 joules (1.8 MJ). Formula: 0.5 × 3,600,000 = 1,800,000 J. This equals 30 minutes of a 1,000-watt appliance running. A typical 7.4 kW home EV charger adds about 0.5 kWh of charge in under 4 minutes. Common 500-watt appliances — a drip coffee maker, a small air purifier, or a desktop PC — each consume roughly 0.5 kWh per hour of use.
10 kWh = 36,000,000 joules (36 MJ). A typical European household uses about 10–12 kWh per day (roughly 3,500–4,500 kWh per year). The US average is about 30 kWh per day. This also represents the energy stored in a small EV battery segment — a Renault ZOE 50 kWh battery (180 MJ) holds 5× this amount, giving approximately 300–400 km of range.
Multiply the kWh value by 3,600,000 (or 3.6 × 10⁶). Formula: J = kWh × 3,600,000. Examples: 2 kWh = 7,200,000 J; 2.5 kWh = 9,000,000 J; 0.1 kWh = 360,000 J. To reverse (joules to kWh), divide by 3,600,000. The factor 3,600,000 comes from: 1 kW = 1,000 W and 1 hour = 3,600 seconds, so 1 kWh = 1,000 × 3,600 = 3,600,000 J.
A modern EV battery holds 40–100 kWh, equal to 144,000,000–360,000,000 joules (144–360 MJ). Examples: Renault ZOE 50 kWh = 180 MJ; Volkswagen ID.4 77 kWh = 277 MJ; Tesla Model S 100 kWh = 360 MJ. At roughly 6–8 km per kWh, a 60 kWh (216 MJ) battery provides approximately 360–480 km of range. Home charging at 7.4–11 kW adds 26.6–39.6 MJ per hour.
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