Plant Spacing Calculator

How many plants fit in your bed?

Buying seedlings before you know how many you need is how gardens end up overcrowded or half-empty. This plant spacing calculator does the arithmetic for you: give it the width and length of your bed and the recommended spacing for one plant, and it counts how many fit. It divides the bed by the spacing along each side, multiplies columns by rows, and draws the layout so you can actually see the result before you dig.

Square grid vs. triangular offset

A square grid lines plants up in tidy rows and columns — simple to plant and easy to hoe between. A triangular (offset) layout shifts every other row by half a spacing, nestling plants into the gaps. Because the rows sit closer together, you usually squeeze in more plants for the same spacing, which is why intensive and square-foot gardeners favor it. Switch layouts above and the plant count and grid update instantly.

Getting spacing right

Use the on-center spacing from the seed packet or plant tag — that is the distance from the middle of one plant to the middle of the next, and it already accounts for mature spread. Keep every field in the same unit (all inches, or all feet). If your bed is measured in feet but spacing is in inches, convert first. These figures are planning estimates, not professional horticultural advice; real yields depend on soil, sun, variety, and climate.

How to use it

1. Enter your bed width and length.
2. Type the recommended plant spacing.
3. Pick your units and make sure all three match.
4. Choose square grid or triangular offset.
5. Read the plant count and check the live grid below.

FAQ

Does it round plant counts up or down?

Down. It only counts plants that fully fit, so you never over-buy for space that isn't there.

Should I use plant spacing or row spacing?

Use the plant (in-row) spacing. This tool applies it in both directions for even coverage.

Why does triangular give more plants?

Offset rows pack closer together vertically, fitting extra rows into the same length.

What if my bed is an odd shape?

Enter the largest rectangle that fits inside it, then subtract for any corners you can't plant.