Calculate energy requirements, heating time, and costs for water heating systems.
Determine the energy needed to heat water from one temperature to another, calculate heating time based on power input, and estimate costs for various heating methods.
Click on any example to load it into the calculator.
Typical household water heater setup for a family of four.
Volume: 200 L
Initial Temp: 10 °C
Target Temp: 60 °C
Power: 3.0 kW
Efficiency: 90 %
Cost: 0.15 $/kWh
High-capacity system for commercial or industrial use.
Volume: 1000 L
Initial Temp: 15 °C
Target Temp: 80 °C
Power: 15.0 kW
Efficiency: 85 %
Cost: 0.12 $/kWh
Modern heat pump water heater with high efficiency.
Volume: 150 L
Initial Temp: 12 °C
Target Temp: 55 °C
Power: 2.5 kW
Efficiency: 300 %
Cost: 0.18 $/kWh
Solar thermal system with electric backup heating.
Volume: 300 L
Initial Temp: 20 °C
Target Temp: 65 °C
Power: 4.0 kW
Efficiency: 95 %
Cost: 0.14 $/kWh