Calculate radiator output and total heating system power for boiler range rating and system design.
Radiator Output Calculator
Radiator Output
0
Watts
Formula
Watts = Delta T Factor × Panel Type Factor × (Height cm × 10) × (Length cm × 10)
Total Heating System Output
Enter the wattage for each radiator or circuit to calculate the total system output. Leave unused fields at 0.
Total System Output
0
Watts
Total System Output
0.00
kW
Important: This calculator provides approximate radiator output at default Delta T of 50°C (typically 80°C flow, 60°C return, 20°C room temp or 75°C flow, 65°C return, 20°C room temp). Use the calculated kW value for boiler range rating. Always consult with a qualified heating engineer.
