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Rows of leafy cannabis plants beside an open service aisle in an indoor growing room

Space planning / The allocation desk

Cannabis Canopy & Plant Spacing Calculator

Estimate how much of a room can become usable canopy after aisles and work space are reserved. Then convert that canopy target into plant positions using your own square-foot-per-plant assumption.

01 Measure02 Reserve03 Compare
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01 / Set the room

Give every square foot a job.

Room dimensions set the outline. Your reserved percentage sets the split.

Inputs / feet

Room & allocation

Use measured room dimensions and your own space allowance. There is no recommended density preset.

Area study

Your room, in proportion.

Top view
Room area allocationThe room outline follows the entered length and width. A solid canopy area and hatched reserved area divide it by the entered percentage. This does not show plant placement or actual aisle geometry. 24 ft16 ft
Usable canopy70%
Aisles & work space30%

Room proportions are scaled. The strip arrangement illustrates area only; it is not an aisle or plant-placement plan.

Read the result correctly

Positions are an area quotient, not a fitted layout. This does not place individual plants, test door or aisle clearance, or check legal plant limits. More positions does not establish a better growing density.

What it calculates

Use the result as a scenario, not a black box

This calculator keeps the two decisions separate: how much of the room is truly usable canopy, and how densely you intend to allocate that canopy. That makes it useful for testing layouts without assuming a particular cultivation method or claiming one spacing number is universally correct.

How the math works

Floor area = length × width. Usable canopy = floor area × (1 − aisle percentage). Reserved work area = floor area − canopy area. Plant positions = floor(canopy area ÷ square feet per plant).

Example

A 24 × 16 foot room has 384 square feet of floor area. Reserving 30% for aisles and work space leaves about 269 square feet of canopy. At four square feet per position, the planning estimate is 67 positions.

FAQ

Questions about this calculator

Is canopy area the same as room area?

Usually not. Canopy is the area actively used for cultivation, while the room also needs circulation, equipment and work space.

Why use square feet per plant?

It lets you test your own operating model instead of embedding one cultivation style in the calculator.

Does this check legal plant limits?

No. Legal plant and canopy limits vary by jurisdiction and license type and must be checked separately.

Keep calculating

Complete the room plan.

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