Electricity Cost Calculator
Calculate daily, monthly, and yearly electricity costs for any appliance.
📊 Result Chart
About Electricity Cost Calculator
The Electricity Cost Calculator is a free online tool that estimates how much an appliance costs to run. Enter the power rating in watts, daily usage hours, and your electricity rate per kWh to see daily, monthly, and yearly costs. Perfect for managing energy expenses. Works on mobile and desktop, all calculations run locally in your browser.
Electricity Cost Calculator in 3 steps
- Enter the appliance power rating in watts
- Enter the daily usage hours
- Enter your electricity rate per kWh, then click "Calculate"
How is electricity cost calculated?
Daily energy used (kWh) equals watts times hours divided by 1000. Daily cost equals kWh times the rate. Monthly = daily × 30, yearly = daily × 365.
Why use 30 days for monthly?
For simplicity, the calculator uses 30 days per month. For precise billing cycles, multiply the daily cost by your actual billing days.
Is this calculator free?
Yes, completely free. No sign-up or download needed.
Is my data safe?
Absolutely. All calculations run locally in your browser. No data is uploaded to any server.