Greenhouse Power Calculator

The greenhouse heat calculator is for very approximate guidelines only. Many internal and external factors such as type of internal wrapping, walling, wind speed etc. would have an impact on the correct volume of heat power required. For precise calculations, we recommend that a specialist heating engineer is consulted prior to equipment purchase.

Square Surface Area Calculator for a Standard Gable End Greenhouse Structure

Calculate dimensions by: or

Please fill in the details below then click the calculate button.

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Square Surface Area Calculator for a Lean To Greenhouse Structure

Please fill in the details below then click the calculate button.

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Power required to heat a greenhouse

Please fill in the details below then click the calculate button

This section calculates the Power required to heat a greenhouse or glasshouse structure in winter based on your input parameters. This calculation is intended as a guide for estimation purposes only . Other factors like wind shear heat loss can also significantly increase heating requirements.

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Heat Loss Factor Parameters

Please chose the one that most represents your Structure

Single layer of glass
1.1
Glasshouse bubble wrap lined
0.6