Electricity cost · water heater
A 4,000 W water heater used about 3 hours a day costs roughly $2.04 per day, $62.05 a month, or $744.60 a year at the $0.17/kWh US average rate — and uses about 12 kWh a day. These are indicative figures; adjust the wattage, hours, and your $/kWh below for your own home.
Typical wattages & rates indicative, as of — use your bill's $/kWh
Running a typical 4,000 W water heater about 3 hours a day costs roughly $2.04 a day, $62.05 a month, and $744.60 a year at the $0.17/kWh US average — about 12 kWh a day. An electric water heater uses a high-wattage element that cycles to reheat the tank; for many homes it's one of the top electricity users.
These are indicative figures, not a bill. Your real cost depends on the unit's actual wattage, how long you run it, and your local rate. Enter your own watts and the $/kWh from your bill in the calculator above for an accurate estimate. Cycling appliances don't run at full power continuously.
Indicative: typical 4,000 W × 3 h/day at the $0.17/kWh US average, as of 2026-06. Use your bill for accuracy.
Indicatively, a typical 4,000 W water heater run about 3 hours a day costs roughly $2.04 per day, $62.05 per month, and $744.60 per year at the US-average rate of $0.17/kWh, using about 12 kWh a day (4380 kWh a year). An electric water heater uses a high-wattage element that cycles to reheat the tank; for many homes it's one of the top electricity users. These are indicative figures — your real cost depends on the unit's actual wattage, how long you run it, and your own electricity rate.
At a typical 4,000 W and 3 hours of use a day, it draws about 12 kWh per day — roughly 4380 kWh over a year on the default schedule. Element cycles to reheat the tank; ~3 h/day equivalent of full-power running for a typical household. Multiply the kWh by your own $/kWh to get your cost.
The two levers are running it less (fewer hours or, for seasonal items, fewer days) and paying less per kWh. Using the appliance during off-peak hours can help if you're on a time-of-use plan, and a more efficient model lowers the wattage. The single most accurate thing you can do is enter your real wattage and your bill's $/kWh in the calculator above.
Indicative estimate only. The 4,000 W figure is a typical indicative value, not a spec for your specific water heater, and $0.17/kWh is an indicative US average, not your tariff. Real cost varies widely by model, efficiency, usage, and your local rate and plan. For an accurate figure, use the wattage on your appliance and the $/kWh on your electricity bill. Data as of 2026-06.