Agriculture & Farming
Greenhouse Heating Calculator
Lets users plan and optimise greenhouse heating instantly with formula, steps and examples — no manual math.
Enter your details
m²
°C
W/m²·K
Your result
Heating power needed
4,500 W
Heat loss = area × U × ΔT = 4,500 W (4.5 kW) — the heater size needed.
In kilowatts
4.5 kW
In BTU/hr
15,354 BTU/hr
About this calculator
Greenhouse heat loss = surface area × U-value × temperature difference. Match your heater to this wattage. Lower-U coverings (twin-wall polycarbonate ~3.5) roughly halve the requirement of single glass.
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