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Electricity Cost Calculator
Compute the running cost of an electrical appliance.
Inputs
Enter your values below.
Result
Your answer appears here.
Enter values and press Calculate — the result appears here.
How it works
The formula behind this calculator.
energy = power × time; cost = energy × pricePerKwh
- power
- Wattage (W)
- time
- Hours of use
Energy = power × time. Standby power (vampire draw) can add 5–10% to your bill. Unplug what you're not using.
Example: 1,500 W AC for 8 h/day × 30 days = 360 kWh → ~$54 at $0.15/kWh
Ref: Electricity bills typically bill in kWh
Tips
- 💡 Appliance power = voltage × current (P = V × I). A 120V, 5A appliance uses 600 W.
- 💡 Standby power can add 5–10% to your bill. Unplug what you're not using.