What is the Electricity Cost Calculator?
Calculate how much an appliance costs to run per day, month and year. Quick, everyday math — splitting the bill, checking a sale, comparing prices at the store or scaling a recipe — shouldn’t need a spreadsheet. These calculators answer it in a second.
How to use the Electricity Cost Calculator
- Enter your power rating, your hours used per day, your electricity price.
- Results update automatically as you type; you can also press Calculate.
- Read the output: cost per month, cost per day, cost per year, energy per month.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With power rating = 1,500 watts, hours used per day = 3, electricity price = 0.16 $/kWh, the Electricity Cost Calculator returns cost per month: $21.60; cost per day: $0.72; cost per year: $262.80.
Tips for better results
- Stacked discounts multiply rather than add: 30% + 20% off is 44% off, not 50%.
- Compare unit prices, not package prices, to find the real deal.
- Bookmark the tools you use often — every page works offline once loaded.
Frequently asked questions
What does the Electricity Cost Calculator do?
Calculate how much an appliance costs to run per day, month and year.
How is it calculated?
The Electricity Cost Calculator uses this method: kWh = Watts ÷ 1,000 × Hours; Cost = kWh × Price.
Can you show an example?
With power rating = 1,500 watts, hours used per day = 3, electricity price = 0.16 $/kWh, the Electricity Cost Calculator returns cost per month: $21.60; cost per day: $0.72; cost per year: $262.80.
Is the Electricity Cost Calculator accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Electricity Cost Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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