Electric water heater consumption calculator
Estimate an electric water heater's consumption and its daily, monthly and yearly cost.
Calculatete now →How much electricity does an electric water heater use?
An electric water heater mainly uses energy to heat water and may then cycle to maintain its temperature. Consumption depends on tank capacity, temperature setting and hot-water use.
La potencia nominal no significa que la resistencia esté calentando continuamente durante todas las horas del día. Para una estimación más precisa, conviene medir el consumo real.
Use the calculator with example values →What do you need to calculate it?
Enter the appliance power, usage hours, days per month and your approximate price per kWh. If there is standby consumption, you can add it separately.
How to get a real-world figure
When possible, use an electricity consumption meter. This lets you replace the estimate with the measured consumption of your own appliance.
Basic formula
Consumption (kWh) = potencia (W) ÷ 1000 × horas de uso.
Cost = consumption (kWh) × electricity price.
More tools
See our general electricity consumption calculator to compare different appliances.