Plant Spacing & Density Calculator
Calculate plant density per hectare and total plant count from row spacing, in-row spacing, and field area.
Results
What is it?
Plant density is the number of plants per unit area, determined by row spacing and in-row spacing. Optimal density maximises yield by balancing light interception, nutrient competition, and root space. Density (plants/m²) = 10,000 ÷ (row spacing cm × plant spacing cm).
How to use
Enter the row spacing and within-row plant spacing in centimetres. Select the field area and unit. The calculator returns density per hectare, per acre, and total plant count for the field.
Example scenario
Corn planted at 75 cm rows with 20 cm in-row spacing: density = 10,000 / (75 × 20) = 6.67 plants/m² = 66,667 plants/ha. This is within the typical corn density range of 60,000–80,000 plants/ha for most hybrids.
Pro tip
Narrower row spacing often increases yield by improving light interception early in the season. Shifting from 76 cm to 38 cm rows in soybeans typically delivers 5–10% yield gain. However, narrow rows require compatible equipment. Optimal density is cultivar-specific — always consult the seed company agronomist's recommendation.