Electricity Cost Calculator
Calculate the electricity cost of a heater, gaming PC, fridge or AC and see exactly what it adds to your bill.
- Runs on your device
- No watermark
- Free, no signup needed
- Available offline
How to use it
- Enter your numbers.
- Results update instantly.
- Adjust any value to compare scenarios.
Questions
How do I calculate electricity cost?
Watts × hours used ÷ 1,000 gives kilowatt-hours (kWh); multiply that by your rate. A 1,500 W heater used for 4 hours uses 6 kWh, which costs $1.02 at $0.17 per kWh.
Where do I find my electricity rate?
On your electricity bill, as the price per kWh. If your plan has several charges, divide the total bill by the kWh used for an all-in rate.
How do I find an appliance’s wattage?
Check the label on the back or bottom, or the manual. If it only lists amps, multiply by the voltage: 120 V in the US and Canada, 230 V in Australia.
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