Electric water heater cost calculator
How Much Does an Electric Water Heater Cost to Run?
Estimate the electricity cost of an electric water heater from its element wattage, daily heating time, and your electricity price.
Cost estimate
Calculate your electricity cost
Estimated energy use0 kWh/day
Estimated monthly energy0 kWh/month
Cost = watts ÷ 1,000 × hours used × electricity price.
Example
How the starting estimate works
At 4,500 watts for 3 hours of active heating per day, the example uses 13.5 kWh per day before multiplying by your electricity price.
Real-world use
The heating elements do not run all day.
A tank water heater cycles its elements on and off as needed. Enter estimated active heating time rather than treating the element rating as a continuous 24-hour load.