Rate & billing period
Electricity rate
Appliances
Appliances
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Your estimate
Enter price per kWh and at least one appliance (wattage and hours per day) to see your estimate.
Electricity cost is energy in kilowatt-hours (kWh) times your utility rate: first convert watts and run hours to kWh, then multiply by price per kWh to estimate what a device costs per day or month.
Runs in your browser · No data stored · No signup
Estimates only—real bills and study needs vary.
Electricity cost is energy in kilowatt-hours (kWh) times your utility rate: first convert watts and run hours to kWh, then multiply by price per kWh to estimate what a device costs per day or month.
Free electricity cost calculator: kWh = (watts ÷ 1000) × hours; cost = kWh × your $/kWh rate—stack appliances, peak/off-peak. Runs in your browser, no signup.
Provide the values required for this estimate.
Use the output as a planning baseline and adjust for your situation.
Copy results or change inputs to compare scenarios.
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Electricity cost is energy in kilowatt-hours (kWh) times your utility rate: first convert watts and run hours to kWh, then multiply by price per kWh to estimate what a device costs per day or month.
No—outputs are rough planning estimates, not tax, billing, or grading advice.
Wattage and rate inputs are processed locally and are not stored on a server.
Estimates only—real bills and study needs vary.
For personal planning—not a substitute for utility bills or academic advising. Financial results are estimates for planning only — not tax, legal, or investment advice. Verify with your employer, institution, or a qualified professional.
More free tools for the same workflow.
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Reviewed by EverydayTools Editorial Team on 2026-05-19.