Joule to Kilowatt Hour Converter

Convert between joules and kilowatt hours for energy calculations, electricity consumption, and power system analysis

Joules (J)

1 J = 2.778×10⁻⁷ kWh

Kilowatt Hours (kWh)

1 kWh = 3,600,000 J

Enter a value to see the conversion result

Energy Scale Reference

Joules	⇔	Kilowatt Hours
3,600 J	⇔	0.001 kWh
36,000 J	⇔	0.01 kWh
360,000 J	⇔	0.1 kWh
3,600,000 J	⇔	1 kWh
18,000,000 J	⇔	5 kWh
36,000,000 J	⇔	10 kWh

Electrical Energy Examples

Household Appliances:
• LED bulb (10W, 1h): 36,000 J (0.01 kWh)
• Laptop (50W, 1h): 180,000 J (0.05 kWh)
• Microwave (1000W, 1h): 3.6×10⁶ J (1 kWh)
• Electric heater (2000W, 1h): 7.2×10⁶ J (2 kWh)

Daily Energy Consumption:
• Smartphone charging: 0.01-0.02 kWh
• TV watching (4h): 0.4-0.8 kWh
• Washing machine cycle: 1-2 kWh
• Electric car (100 miles): 25-40 kWh

Energy Storage:
• AA battery: 14,400 J (0.004 kWh)
• Car battery: 2.16×10⁶ J (0.6 kWh)
• Home battery: 4.68×10⁷ J (13 kWh)
• Tesla Model S: 3.6×10⁸ J (100 kWh)

Energy Units

Joule: SI unit of energy
Kilowatt Hour: 1000 W × 3600 s
Conversion: 1 kWh = 3.6×10⁶ J
Formula: Energy = Power × Time

Usage Tips

J for scientific calculations
kWh for electricity bills
Large scale difference
Power × time = energy

Applications

Electrical: Power consumption
Physics: Energy calculations
Engineering: System design
Economics: Energy costs