Fan Size Calculator Heater Size Calculator Plastic Size Calculator Surface Area Calculators
The total surface area of a greenhouse is needed to calculate the size of heater needed to properly heat the greenhouse. Just enter the greenhouse dimensions into the greenhouse surface area calculator below to find the total surface area of your greenhouse kit.
Greenhouse Surface Area Calculators
Select Frame Style: Gable Frame, Hoop Frame, or Lean-to
Length of Greenhouse (feet)
Measurement L on the diagram.
Gable Frame Area Calculator
A-frame diagram
Width of Greenhouse (feet)
Measurement W on the diagram.
Height of Greenhouse (feet)
Measurement H on the diagram.
Height of Sidewalls (Feet)
Measurement S on the diagram.
 
Area of Greenhouse - Use this in our Greenhouse Heater Calculator to calculate the minimum BTU output heater needed for your greenhouse.

Length of Greenhouse (feet)
Measurement L on the diagram.
Quonset (Hoop) Frame Area Calculator
Quonset frame diagram
Width of Greenhouse (feet)
Measurement W on the diagram.
Height of Greenhouse (feet)
Measurement H on the diagram.
Length of Bows (feet)
Measurement B on the diagram.
 
Area of Greenhouse - Use this in our Greenhouse Heater Calculator to calculate the minimum BTU output heater needed for your greenhouse.
Length of Greenhouse (feet)
Measurement L on the diagram.
Lean-to Area Calculator
Lean-to diagram
Width of Greenhouse (feet)
Measurement W on the diagram.
Height of Greenhouse (feet)
Measurement H on the diagram.
Height of Sidewalls (feet)
Measurement S on the diagram.
 
Area of Greenhouse - Use this in our Greenhouse Heater Calculator to calculate the minimum BTU output heater needed for your greenhouse.

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