Home energy planning tool
Electricity Usage Calculator
Estimate how much electricity common household appliances use per day, month, and year. Select an appliance to fill typical wattage and usage, then adjust the numbers to match your home.
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Request a project estimateAppliance usage inputs
Choose a common appliance, adjust wattage and runtime, then calculate estimated energy use and cost.
Appliance category
Use the label or manual for the most accurate wattage.
Check your utility bill for your current energy rate.
Formula details and assumptions
Formula
- Hours per day = usage value x selected time conversion.
- kWh per day = watts x hours per day / 1,000.
- Cost = kWh x electricity price per kWh.
Assumptions
- Month estimates use 30.44 days.
- Year estimates use 365.25 days.
- Actual utility bills may include taxes, fees, and variable rates.
Electricity estimate notes
Wattage varies
Appliance labels, model specs, and actual usage can differ from typical defaults. Use the real watt rating when available.
Usage matters
Small changes in daily runtime can add up over a month or year, especially for heating, cooling, and laundry equipment.
Costs are estimates
Utility rates, taxes, fees, demand charges, and seasonal usage can change the final bill.