Free Electrical Energy Calculator
Calculate electrical energy consumed using E = P * t.
W
hours
Energy (kWh)
0.5000 kWh
Energy (Joules)1,800,000 J
Energy (kWh) vs Time
Electrical Energy
Electrical energy is power consumed over a period of time.
Formula
E = P * t
In practical units: kWh = W * hours / 1000. In SI units: Joules = Watts * seconds.
Example Calculation
A 100 W light bulb running for 5 hours.
- 01E = P * t
- 02E = 100 * 5 = 500 Wh
- 03E = 0.5 kWh
- 04E = 100 * 5 * 3600 = 1,800,000 J
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