Greenhouse Size Calculator
Check whether two side benches and a center aisle fit the usable inside dimensions.
Your planning estimate
Enable JavaScript to run this calculator. The formula and assumptions are available below.
How this tool works
This is a rectangular layout check, not a plant-spacing or accessibility recommendation. Enter usable internal measurements after allowing for framing, doors and installed equipment. Default values are examples, not required aisle dimensions.
Bench area = 2 × bench depth × (inside length − 2 × end clearance). Center space = inside width − 2 × bench depth.
What this estimate does not tell you
The result does not include door swings, projecting hardware, accessible-route requirements, shelving above the benches or crop-specific spacing. A kit’s outside footprint is not its usable inside space.
Planning guidance only. Manufacturer documentation, local building requirements and qualified professionals control final structural, electrical and gas installation decisions.