Flow Rate (LPM) to Energy Used (kWh)

Calculate energy consumption from hot water flow rate, temperature rise, and usage duration.

Flow Rate (Litres per Minute) 10.0

Temperature Rise (Degrees Celsius) 35

Duration of Water Usage (Minutes) 1

Energy Used

2.44

Kilowatt-Hours (kWh)

Formula

kWh = ((F / 60) × T × 4.186) × (D / 60)

kWh = Energy used (kilowatt-hours)
F = Flow rate (litres per minute)
T = Temperature rise (°C)
D = Duration of water usage (minutes)
4.186 = Specific heat capacity of water (kJ/kg·K)

Important: This calculator provides theoretical energy calculations for hot water usage. Actual energy consumption may vary based on system efficiency and heat losses.