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Water heater: what does it cost to run?
Calculate the cost, compare common appliances, and get one practical saving idea — instantly.
Estimated monthly cost
$16.20$0.54 / day$197.10 / year
90.0 kWh used each month02 · Appliance-specific guide
How to estimate water heater correctly
The 3000 W and 1 h/day values are an editable example, not a claim about every model. This appliance is best treated as thermostat-controlled use.
What to verify
Separate active heating time from standby heat loss; tank size, inlet temperature and thermostat setting all matter.
Formula
Power (W) ÷ 1,000 × active hours × electricity rate. This example uses 3 kWh/day, 90 kWh/30 days and 1,095 kWh/year.
Accuracy limit
The calculator prices the values you enter. It cannot know thermostat cycles, power modes, losses, appliance condition or the exact tariff on your bill; verify those inputs for a decision.
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A small change based on your numbers
Your energy coach
High-power appliances respond best to shorter use, timers, and efficient temperature settings.
Use it one hour less each day
$197.10Possible saving per yearTry a common appliance
One tap. Real numbers.
Compare before you plug in
Compare before you plug in
Two appliances can do a similar job at very different monthly costs.
Monthly difference$12.42
Washing machine costs less