Energy Cost Calculator - kWh
Watts, hours, cost, instantly
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About
Energy Cost Calculator tells you exactly what your devices cost to run.
Enter a wattage, or pick from common household devices, set your hours, days, and electricity rate, and get an instant cost breakdown. Running multiples of the same device? One toggle handles it. Add devices to a running list to see your total energy cost at a glance, with your own saved devices for quick reuse next time.
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What's New in Energy Cost Calculator
1.1
October 8, 2026
A redesigned, cleaner interface: - Simplified layout with clearly organized sections - Cost per kWh now has its own quick-access screen, with a tip on where to find your rate on your bill - Enter wattage directly, with a simple +/− control for multiple identical devices - Edit any saved device after adding it, just tap to update wattage, usage, or cost - Delete devices with a confirmation step, so nothing's removed by accident
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