Plant Spacing Calculator
Find how many plants fit in a bed at a given spacing, in a square grid or a triangular (offset) grid.
Change the values and press Calculate to work out your own figures.
Enter the bed's length and width and the spacing.
Show the working
- square grid: ⌊length ÷ spacing⌋ × ⌊width ÷ spacing⌋
- triangular grid: rows spacing × √3 ÷ 2 apart, alternate rows offset by half a spacing
How to use it
Enter the bed's length and width and the spacing.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
square grid: ⌊length ÷ s⌋ × ⌊width ÷ s⌋ triangular grid: rows s × √3 ÷ 2 apart, alternate rows offset by s ÷ 2
Which grid?
A triangular grid fits about 15% more plants in a large bed and covers ground faster; a square grid is easier to lay out.
Questions
How many plants 12 in apart in a 10 × 10 ft bed?
100 in a square grid, 105 in a triangular grid.
Formulas
square grid: ⌊length ÷ s⌋ × ⌊width ÷ s⌋ triangular grid: rows s × √3 ÷ 2 apart, alternate rows offset by s ÷ 2
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.