METHODCalculation, assumptions and sources
Formula used
energy (kWh) = power (kW) × time (h); cost = energy × tariff
What is included
Calculate appliance energy use and cost per day, month and year including standby time.
Assumptions and limits
Ideal DC relationships and constant use are assumed. AC power factor, startup current and tariff tiers are not automatically included.
Reference sources
U.S. Department of Energy: estimating appliance energy use
Last reviewed: September 2026Electricity Cost Calculator
Calculate appliance energy use and cost per day, month and year including standby time.
Enter the required values or content, adjust the options and then review the detailed result.
FAQFrequently asked questions
What can I do with Electricity Cost Calculator?
Calculate appliance energy use and cost per day, month and year including standby time.
How do I use Electricity Cost Calculator?
Enter the required values or content, adjust the options and then review the detailed result.
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Does it work on mobile?
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