Watt Calculator
Find the right radiator for your space with our radiator watt calculator. Enter your room details to see the optimal heat output in watts (W) needed to reach a comfortable, consistent temperature.
Radiator power calculator
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Units: metres (m)
Estimated radiator power
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Disclaimer: Please note– Our calculations are only estimated and are based on information you provide. Our heating calculator can only process the most common factors that affect heat loss and may not take into account all factors relating to your particular requirements. For full and accurate calculation of heat requirements for any space, it is advised to follow EN 12831‑1 standards in line with the
European Commission – Energy Performance of Buildings Directive