Electricity Consumption Cost Calculator

Enter the device's power, daily usage time, and the kWh unit price from your own bill; see the daily, monthly and yearly consumption cost.

Runs 100% in your browser — your information is never sent to a server.
The kWh unit price changes frequently based on electricity distribution tariffs and varies by region/subscription — there is NO embedded/fixed rate here; for the most accurate result, enter the kWh unit price from your latest bill (including distribution+energy charges, before or including taxes — your choice).
Daily
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Monthly (×30)
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Yearly (×365)
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Frequently Asked Questions

Daily kWh = Device power (Watt) × Daily usage time (hours) / 1000. For example, a 1000 W device running 4 hours a day consumes 1000×4/1000 = 4 kWh.

OpenMoon does not connect to a live pricing service (the site never sends user data to a server or calls external APIs); electricity tariffs also vary frequently by region, subscription type and time, so for the most accurate result you should enter the real kWh unit price from your latest bill yourself.

Your electricity bill usually lists an "Energy Charge" or "Active Energy" line item in currency/kWh; if you want to include distribution charges and taxes, you can find your own effective unit price by dividing the total bill amount by the total kWh.

No. All calculation is done in your browser with JavaScript — no value is ever sent to OpenMoon's servers.

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