Electricity Cost Calculator
Estimate the monthly electricity cost of an appliance from watts, daily hours and your price per kWh.
Set your values
Adjust the values, then calculate your result.
How to use Electricity Cost Calculator
- Enter the measurements or amounts in the fields above.
- Check that dimensions, rates and units match the labels.
- Select “Estimate electricity cost” to see a clear estimate and the formula used.
How the electricity cost calculator works
Energy in kWh = watts ÷ 1,000 × hours per day × days. Estimated cost = kWh × price per kWh.
Check your measurements and assumptions
Use the appliance’s average power draw when available. Standby use, variable loads, taxes, fixed charges and tiered utility pricing are not included.
Review the estimate before you act
Compare this result with an independent measurement, supplier quote or institution guidance when the decision matters. Confirm that the units and assumptions match the labels above, and update the inputs when the conditions change. Keep a note of the values used so you can reproduce the estimate later. This calculator is a planning aid and does not replace professional, product-specific or local guidance.
How much does a 1,000-watt appliance cost to run?
One hour uses about 1 kWh. Multiply the hours used by your utility price per kWh.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.