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Electric Water Heater Cost Calculator

Water heating is typically the second-largest energy use in a home after heating and cooling — usually around 15% of the electricity bill. An electric water heater draws about 4,000 watts when its element is on, but it only heats when hot water is used or when standby heat is lost, so the real cost tracks your household's hot-water habits. This calculator estimates what your electric water heater costs per day, month, and year based on realistic usage.

Appliance
Wattage(W)
Quantity
Usage measured in
Usage
Duty cycle (share of time actually drawing power) 15%
State (auto-fills rate)
kWh / day
14.40kWh

watts × hours × duty ÷ 1000

Cost / month
$73.44

at your state rate

Cost / year
$894

this appliance

Results update live as you type. For planning and field-check estimates — always verify against applicable standards and equipment ratings.

Build a whole-home estimate item by item.

Resistance heating vs. heat pump water heaters

A standard electric tank water heater uses resistance coils — converting electricity to heat at 100% efficiency. That sounds good until you compare it to a heat pump water heater (HPWH), which moves heat from surrounding air into the water at 200–350% efficiency (COP 2–3.5). The same water heating task costs 2–3.5× more with a resistance heater than a HPWH.

For a household spending $600/year on electric water heating, switching to a HPWH saves $350–$450 annually. At a net cost of $800–$1,200 after the 30% federal tax credit, payback is typically 2–3 years. States like California, New York, and Massachusetts add rebates that often cut the net cost to under $500.

Frequently asked questions

A typical electric water heater costs about $40 to $60 a month for an average household at the U.S. average rate. Larger households using more hot water land higher; a smaller or more efficient setup runs lower.

It's one of the bigger line items on the bill — usually second only to heating and cooling. Because it heats a large volume of water with a high-wattage element and does so daily, it uses more total energy over a year than most appliances, even though it isn't running every minute.

Yes, typically far less — often 60–70% less energy. Heat pump (hybrid) water heaters move heat rather than generating it directly, making them dramatically more efficient than standard electric-resistance models, though they cost more upfront.

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