Plant spacing calculator

Type the size of your bed and the spacing from the seed packet or plant tag. You get the number of rows, plants per row and the total that fit.

Units
ft
ft
in
in
Plants that fit16
Rows
2
Plants per row
8
Bed area
32 ft²

Runs in your browser: nothing you enter is sent anywhere.

How to use it

  1. Choose metric or US units.
  2. Enter the bed length (the direction of the rows) and width.
  3. Enter the spacing within a row and between rows.

How it works

Plants per row = ⌊length ÷ in-row spacing⌋, rows = ⌊width ÷ row spacing⌋, total = plants per row × rows.

Worked example

A bed 3 m long and 1.2 m wide, plants 30 cm apart, rows 40 cm apart: 300 ÷ 30 = 10 plants per row and 120 ÷ 40 = 3 rows, so 30 plants.

Tips

  • Leave a path or reach width: most people can reach about 1.2 m (4 ft) into a bed from one side.
  • Stagger rows in a triangular pattern to fit slightly more plants than this grid count.

Frequently asked questions

Which spacing should I use?

Use the numbers on the seed packet or plant tag. They usually list the distance between plants in a row and the distance between rows. Square-foot gardening uses the same distance in both directions.

How are the plants counted?

Each plant gets a cell of in-row spacing × row spacing. The calculator counts how many whole cells fit along the length and across the width, so partial cells at the edge are not counted.

Can I plant closer than the packet says?

You can, but plants then compete for light, water and nutrients. Closer planting is common for leafy crops you pick young, and a bad idea for tomatoes or squash.

Does it work for flowers and shrubs?

Yes. Any plant that is grown in a regular grid works; enter its spread as the spacing.

More in Hobbies

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