Plant Population Calculator
Calculate plant population (plants per acre) using row spacing and in-row plant spacing.
Inputs
How It Works
Plant population is calculated using:
Population = 43,560 ÷ (Row Spacing × Plant Spacing in feet)
Since spacing is entered in inches, we convert inches to feet before calculating.
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FAQ
Why is 43,560 used?
There are 43,560 square feet in one acre. This constant converts spacing into plants per acre.
Does this account for germination?
No. This calculates theoretical plant population. Use the Seed Rate Calculator to account for emergence and survival.
What is typical corn population?
Many growers target 28,000 to 36,000 plants per acre depending on region and hybrid.
Understanding Plant Population per Acre
Plant population is one of the most important yield-driving factors in crop production. This plant population calculator helps you determine the number of plants per acre based on row spacing and in-row plant spacing. Whether you are planting corn, soybeans, sorghum, or other row crops, achieving the correct population ensures optimal light interception, nutrient use, and yield potential.
In most modern row-crop systems, population is determined by dividing the total square feet in an acre (43,560) by the square footage occupied by each plant. By entering your row spacing and plant spacing in inches, this calculator converts spacing into feet and instantly calculates plants per acre.
Typical corn populations range from 28,000 to 36,000 plants per acre, depending on hybrid selection, soil productivity, irrigation, and regional climate. Soybean populations often range from 100,000 to 160,000 plants per acre, depending on row width and management practices.
If you need to adjust for germination, emergence loss, or seed survival percentage, be sure to use the Seed Rate Calculator to determine how many seeds per acre should be planted to achieve your desired final stand.