Free garden calculator
Plant Spacing Calculator
Estimate how many plants fit in a rectangular bed using grid or offset spacing and an optional border.
Estimated capacity16plant positions
The diagram shows all 16 calculated positions. Real beds lose efficiency to supports, edges, and imperfect geometry.
How it works
The method
Gardiv divides usable width into rows and usable length into positions. Offset mode adds an extra position only where half-spacing geometry allows it.
Worked example
A 4 × 4 foot bed with 12-inch spacing in both directions holds about 16 grid positions before a border allowance.
Remember: Garden outputs are planning ranges. Weather, cultivar, soil, pests, sunlight, and care can materially change the result.
Read Gardiv’s full calculation methodology →
Common questions
Before you act on the number
Is this square-foot gardening?
It can model a square grid, but it also accepts separate in-row and between-row spacing.
Why is the answer conservative?
Real rectangles, borders, supports, and access do not always pack perfectly.
Can I use seed-packet spacing?
Yes. Packet spacing for the cultivar and harvest stage is often the best local input.
