Electric water heater Electricity Cost Calculator
Estimate running cost from wattage, daily use, and your utility rate. Replace the preset with values from your own appliance for a more useful result.
Appliance and usage
Start with a typical value, then enter what is on your device label.
Selected applianceElectric water heaterIllustrative resistance-heating preset.
Your estimate
ELEC_COST_V1.0$48.60 per month
Daily cost$1.62
Annual cost$591.30
Daily energy9 kWh
Annual energy3,285 kWh
Monthly estimates use 30 days; annual estimates use 365 days.
Result explanation
A 4,500-watt electric water heater running 2 hours a day uses 9 kWh daily.
At $0.18 per kWh, that costs $1.62 per day, $48.60 per 30-day month, and $591.30 per year.
Preset and example
Cost of the electric water heater
Preset power4,500 watts
Daily operating time2 hours
Daily energy9 kWh
Annual energy3,285 kWh
At $0.18 per kWh, the illustrative preset costs $1.62 per day, $48.60 per 30-day month, and $591.30 per year.
Illustrative resistance-heating preset. Guidance: U.S. Energy Information Administration — Measuring Electricity. Checked 2026-10-01.