Electric Water Heater Cost Calculator
Free electric water heater cost calculator estimate. Enter watts, hours and your electricity rate. Prices are editable estimates, your actual use and rate may differ.
How to calculate
Formula: monthly kWh = watts ÷ 1,000 × hours per day × days per month. Cost = monthly kWh × electricity rate.
Worked example: 4500 watts, 3 hours per day, 30 days, rate $0.17 per kWh. Monthly use = 405 kWh, monthly cost = $68.85.
Tips
Watts are average running watts, not peak watts. Check your appliance label or bill, and use your actual electricity rate for the most useful result. Prices are editable estimates.
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Frequently asked questions
How much does this appliance cost to run?
Use the default values as a starting point, then change watts, hours and rate to your own values.
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.