Fan Size Calculator Heater Size Calculator Plastic Size Calculator Surface Area Calculators
Need help sizing replacement plastic for you greenhouse? Our greenhouse plastic size calculator does all the work for you. Just enter the greenhouse dimensions into the calculator below. We offer replacement 6 mil greenhouse plastic in full rolls and custom cut for smaller greenhouse kits.
Greenhouse Plastic Size Calculator
Measure dimensions A, B, C, and D on your greenhouse.
Not sure how to measure C? You can use a 100' measuring tape (usually available at a local hardware store) or take a piece of rope, throw it over the side of the greenhouse, mark it at the base on each side, stretch the rope out on the ground when done, and measure the distance between the two markings on the rope.
A - Length of Greenhouse
B - Peak Height of Greenhouse
C - Bow Length of Greenhouse
D - Width of Greenhouse
(All dimensions are in feet)
Size of Plastic for the Top and Sides
Size of Plastic to Cover Both End Walls
NOTE: If you want to cover your greenhouse with a double layer of plastic film, you will need to purchase 2 of each size plastic listed above. You will also need an inflation blower and jumper hoses for each end wall if you do not have them already.


Greenhouse Dimensions: A=14' B=8' C=16' D=9'
Film size for top and sides = (A + 1') x (C + 1') or 15' x 17'
You will need to order 15' of our 20' wide plastic.

Film size for end walls = (D + 1') x (B + 1') or 10' x (9' x 2 end walls) = 10' x 18'
You will need to order 10' of our 20' wide plastic.

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