Smarter Heating & Hot Water

LPM to KW Calculator

Calculate kilowatts (KW) from flow rate in litres per minute, temperature difference, and specific heat capacity.

Flow Rate (F) Litres/Min 10.0
Temperature Difference (Dt °C) 20
Specific Heat Capacity (SHC) 4.186
Power Output
13.953
Kilowatts (KW)

Formula

KW = (F ÷ 60) × Dt × SHC

KW = Kilowatts (power output)
F = Flow rate (litres per minute)
60 = Litres per minute in one litre per second
Dt = Temperature difference (°C)
SHC = Specific heat capacity (kJ/kg·K)

Important: This calculator provides theoretical power calculations. Always consult with a qualified heating engineer for your specific system requirements.