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General
Electricity Cost
Monthly cost in USD
Runs locally in your browser
Parameters
Results
- Per month
- $36
- kWh
- 240
How it works
Estimate monthly electricity cost for an appliance running at constant power.
Who it's for: Homeowners comparing appliance operating costs or budgeting utility bills.
Calculates kWh consumed over 30 days at the given daily runtime.
Multiplies by your $/kWh rate for a monthly cost estimate.
Assumes constant wattage — suitable for heaters, lights, and similar steady loads.
How to use
- Enter Power in watts (from the nameplate or spec sheet).
- Enter Hours/day the device runs on average.
- Enter Rate in $/kWh from your utility bill.
- Read Per month for estimated cost and kWh for energy use.
Good to know
- For cycling loads like refrigerators, use average compressor runtime rather than 24 hours.