Electricity Cost Calculator
Work out how much an appliance costs to run — enter its watts, hours used and your electricity rate — free online. — free, fast and private.
Your result will appear here.
How to use Electricity Cost Calculator
- Enter the appliance's power in watts (check its label).
- Enter hours used per day, days per month, and your rate per kWh.
- Click Calculate Cost to see the daily, monthly and yearly cost.
Note: this tool runs in your browser. Nothing is uploaded.
Frequently Asked Questions
How do I find my electricity rate per kWh?
It is printed on your electricity bill, usually as the price per kWh (unit). If your bill shows a total and total kWh used, divide the energy charge by the kWh to get your rate.
Is this tool free to use?
Yes, it is 100% free with no sign-up. Your data stays in your browser.
Is my data uploaded or stored?
No. This tool runs entirely in your browser — nothing you enter is uploaded to a server.
Can I use it on my phone?
Yes, it is fully mobile-friendly and works in any modern browser on phone, tablet or computer.