How to use the Electricity Cost Calculator
Enter the consumption, rate per kWh and fixed charges and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
The formula
Estimated bill = kWh × rate + fixed charges.
Examples
- 300 kWh at 0.15
Energy charge: 45 Fixed charges: 0 Estimated bill before taxes and other fees: 45
- 720 kWh at 0.22 plus 12 fixed
Energy charge: 158.4 Fixed charges: 12 Estimated bill before taxes and other fees: 170.4
- 95 kWh at 0.31
Energy charge: 29.45 Fixed charges: 0 Estimated bill before taxes and other fees: 29.45
Limitations and assumptions
Enter the correct tariff and currency yourself. Does not model tiered tariffs, taxes, fuel adjustments or utility-specific fees.
Frequently asked questions
How do I calculate an electricity bill?
kWh used × rate per kWh, plus any fixed charges.
How do I find a device's kWh?
Watts ÷ 1,000 × hours of use. A 1,500 W heater for 2 hours uses 3 kWh.
Are taxes included?
Add them to the rate or fixed charge.
Where do I find my rate?
On your latest bill, in cost per kWh.