Planting Density Calculator — Rectangular Rows

Calculate how many regularly spaced planting positions correspond to a net planted area. The model uses straight, equally spaced rows and a constant distance between positions along each row. It reports positions per square metre, hectare and acre, plus the continuous area-based total.

How to use this tool

1. Measure row-centre spacing and spacing along a row.
2. Choose the common unit used by both distances.
3. Enter net planted area after excluding paths and headlands.
4. Review density and the theoretical position total before laying out the actual field.

Formula

Area per position = row spacing × within-row spacing; density = 1 / area per position; positions = net area × density

Distances are converted to metres and area to square metres. This is a rectangular-grid model with one planting position per cell. It does not assume staggered triangles, multiple seeds in a hole or a survival percentage.

Example

Rows 50 cm apart with positions 20 cm apart allocate 0.5 × 0.2 = 0.1 m² per position. Density is 10 positions/m². Across 100 m² of net planted area, the theoretical total is 1,000 positions.