Calculators toolsUpdated July 2026
Free Electricity Cost / Wattage Calculator
Calculate how much an appliance costs to run based on its wattage, usage, and your electricity rate, directly in your browser.
Free online tool
No signup
Instant results
Browser-first privacy
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Enter a wattage, hours of use per day, and your electricity rate.
$0Daily cost
$0Monthly cost
$0Yearly cost
0Energy used
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How to calculate electricity cost
- Pick a common appliance preset, or enter a custom wattage.
- Enter hours of use per day and your electricity rate.
- See the estimated daily, monthly, and yearly cost.
Common use cases
- Estimate how much an appliance adds to your electricity bill
- Compare the running cost of different appliances
- Budget for electricity costs before buying a high-wattage device
Frequently asked questions
Is this electricity cost calculator free?
Yes. It is completely free, with no signup and no limits.
Where do I find my electricity rate?
Check a recent electricity bill — it's usually listed as a price per kWh (kilowatt-hour).
Are the appliance wattage presets exact?
They're typical estimates. Check your specific appliance's label or manual for its exact wattage if you need a precise figure.