Hot Water Heating Calculator
Size a water heater element and estimate heating time and energy use for domestic or process hot water.
Input Parameters
Tank volume, temperatures and desired heat-up time
Electric resistance ≈ 95–100%, gas ≈ 80–90%
Results
Heat load and required heater capacity
Heat Required, Q
0 kJ
Energy Required
0.00 kWh
Power Required
0.00 kW
Recommended Element Size
0.00 kW
Formulas Used
Sensible heat formulas for water heating (cp = 4.186 kJ/kg·°C)
Heat Load
m: m = V × 1 kg/L
Q: Q = m·cp·(T₂−T₁)
Sizing
Power: P = Q / t
Element: P_element = P / η