Greenhouse Calculator

This calculator helps plan greenhouse specifications by computing floor area, internal volume, and estimated plant capacity. Climate conditions affect heating/cooling requirements and ventilation needs.

1. 1

   Step 1

   Enter the planned length of your greenhouse

2. 2

   Step 2

   Enter the width of the structure

3. 3

   Step 3

   Input the average height (accounting for roof slope)

4. 4

   Step 4

   Select your local climate conditions

5. 5

   Step 5

   Review calculated floor area, volume, and plant capacity

• 1

  Orient greenhouses east-west for maximum winter sun exposure

• 2

  Allow 10-12 sq ft per tomato plant, 4-6 sq ft for peppers

• 3

  Ventilation should exchange air every 1-2 minutes in hot climates

• 4

  Double-wall polycarbonate reduces heating costs by 30-40%

• 5

  Consider roll-up sides for passive ventilation in moderate climates

• Underestimating the heating costs for cold climates

• Insufficient ventilation leading to humidity problems

• Not accounting for pathways and equipment space

• Choosing materials unsuited to local weather conditions