Biology
Find plants per acre and per hectare from row spacing and in-row spacing.
Your inputs
Change any value — everything updates instantly.
Distance between rows.
Distance between plants in a row.
Try an example
Plants per acre
34,848 plants/ac
This means each acre holds about 34,848 plants at this spacing.
What you are seeing
Rows are 30 in apart; plants are 6 in apart along each row.
Seeds drop into place one by one as the planter moves.
Each plant gets 1.25 ft² of space.
Plants per hectare
86,111 plants/ha
Metric equivalent.
Space per plant
1.25 ft²
Ground area each plant uses.
Result explanation: Stand density
34,848 plants per acre.
Real-life comparison: Corn is commonly planted around 30,000–36,000 seeds per acre.
Low, normal or high? Actual stands are lower when not every seed emerges.
Plants per acre against in-row spacing
How to read this chart: Closer spacing means many more plants. The red dot is yours.
Divides an acre by the space each plant occupies.
34,848 plants/ac.
86,111 plants/ha.
Order extra seed for germination losses.
Convert both spacings to feet, multiply, divide into an acre.
plants/acre = 43,560 ÷ ((row ÷ 12) × (in-row ÷ 12))
Symbols
Why this formula works
Each plant occupies one rectangle of row × in-row spacing.
Unit check
ft² ÷ ft² = plants ✓
Worked example
Common mistakes
About 34,848 plants per acre.
Divide plants per acre by expected germination (e.g. ÷ 0.95).
Use the average row spacing.
Shown as a separate card.
Not always; too dense competes for light and water.
Reviewed 2026-09-25 · Next review 2027-09-25
Important limitation. Planning estimate; follow local seeding recommendations.
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