Electricity Cost Calculator
Calculate how much electricity your appliances cost per day, month, and year
Common Appliances
About Electricity Cost Calculator
The Electricity Cost Calculator turns wattage and run time into kilowatt-hours and money: enter watts, hours per day, days per month and your tariff per kWh, and it shows consumption and cost per day, month and year. Presets fill in typical draws for an LED bulb, laptop, desktop PC, TV, fridge, air conditioner, heater or washing machine, useful when pricing an appliance before buying or tracking down what is inflating a bill. The arithmetic runs in the page and results copy to the clipboard.
Use Cases
How to use
Pick a device under Common Appliances to load its typical draw: LED 10W, Laptop 65W, PC 300W, TV 120W, Fridge 150W, AC 1500W, Heater 2000W or Washer 500W.
Or type the exact figure from the rating plate into Power (Watts) instead of using a preset.
Set Hours per day to how long the device really runs, in half-hour steps if needed.
Enter your tariff in Price per kWh and pick the matching Currency: EUR, USD, GBP or JPY.
Read the Daily, Monthly and Yearly cards for the running cost, with the kWh consumed printed in small text under each amount.
Press Copy to copy the full daily, monthly and yearly kWh and cost breakdown as text.
Pro Tips
- Enter your values carefully — small differences in inputs can lead to large changes in the Electricity Cost result, especially for long time periods.
- Use the Electricity Cost to compare multiple scenarios side by side. Open the tool in several tabs to see how different assumptions impact your outcome.
- Bookmark this Electricity Cost and return whenever your situation changes — small updates in income, rates, or expenses are easy to recompute.
- Export or copy the result before closing the tab. Since the Electricity Cost stores no data server-side, your inputs reset when you navigate away.
- Combine this Electricity Cost with our other financial tools (loan, tax, budget calculators) for a more complete financial picture.
Frequently Asked Questions
Yes. The Electricity Cost is 100% free, with no signup, no paywall, no limits, and no watermarks on results. You can use it as often as you need.
No. The Electricity Cost runs entirely in your browser. Your inputs stay on your device and are never transmitted to our servers, guaranteeing privacy.
The Electricity Cost uses industry-standard formulas and returns mathematically precise results based on the inputs you provide. Always verify with a professional advisor for major decisions.
Yes. The Electricity Cost is fully responsive and works on iOS, Android, and all modern mobile browsers with no app install required.
After the initial page load, most calculations run offline because the logic runs in JavaScript on your device. If you lose connection mid-session, you can usually keep calculating.
While the Electricity Cost provides accurate computations, it does not replace professional advice. For tax, legal, medical, or major investment decisions, consult a certified advisor.