Square-Foot Gardening Calculator — Plants per Square
Square-foot gardening divides a bed into 1-foot squares. Enter the total number of square feet in your bed and either the plant spacing (inches) or the number of plants per square foot from your reference. The calculator estimates the total plant count.
What this calculator determines
It estimates total plants for a square-foot bed from the bed area and either plant spacing or a plants-per-square-foot value.
Related calculators
Plant Spacing Calculator
How many plants fit in a garden area at a given spacing (row or grid)
Garden Plant Quantity Calculator
How many plants fill a garden area at a chosen spacing
Row Spacing Calculator
Number of rows and total row length from bed dimensions and row spacing
Seed Quantity Calculator
Estimate seeds needed from row length or area and seed spacing
Garden Size Calculator
Calculate total garden area from length × width in feet, inches, or meters
Examples
16 sq ft, 4 in spacing
16 sq ft, 4 in apart
Calculation
- Plants per sq ft: 144 ÷ 4² = 9
- Total: 16 × 9 = 144 plants
144 plants
Assumptions & Conventions
- Input method
- Spacing mode converts inches to plants per square foot (144 ÷ spacing²); plants-per-square mode uses your reference value directly.
- Rounding
- Total plants is floored to a whole number; it does not add a buffer.
- Plants per square
- There is no universal plants-per-square number — use the recommendation for your specific crop.