Plant and flower calculator

Count plant positions on a rectangular grid using your chosen center spacing and edge margins.

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Plant and flower calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Bed length

Bed width

More inputs and assumptions

Spacing between centers

Margin at each edge

Answer

…

Count plant positions on a rectangular grid using your chosen center spacing and edge margins.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Each direction has floor((length − 2 × margin)/spacing) + 1 positions. Spacing and margins are your inputs; no species-specific planting recommendation or triangular packing is supplied.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Plant and flower calculator

Count plant positions on a rectangular grid using your chosen center spacing and edge margins.

Each direction has floor((length − 2 × margin)/spacing) + 1 positions. Spacing and margins are your inputs; no species-specific planting recommendation or triangular packing is supplied.

Next: Rectangle calculator

A worked example

Example inputs: bed length = 3, bed width = 2, spacing between centers = 0.5, margin at each edge = 0.25. Plant positions = 24.

Before you use the result

Each direction has floor((length − 2 × margin)/spacing) + 1 positions. Spacing and margins are your inputs; no species-specific planting recommendation or triangular packing is supplied.

Example results for bed length

These examples use Bed width: 2; Spacing between centers: 0.5; Margin at each edge: 0.25. They are reference calculations, not recommended settings.

Bed length	Plant positions
1.5	12
3	24
6	48

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ToolOctopus. “Plant and flower calculator.” Updated 2026-09-26. https://tooloctopus.com/plant-and-flower-calculator.

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