01
Formula
Plants per acre = 43,560 ÷ (row inches × plant inches ÷ 144).
Population = plants per acre × acres. The plant population calculator is that second step. Both spacings are inches.
Apply for financingPlant spacing
Plant spacing calculator for population per acre
This plant spacing calculator divides an acre by the rectangle each plant occupies. Row spacing times plant spacing, in inches, is that rectangle. The plant population calculator multiplies the per-acre count by your acres. It does not recommend a spacing. It counts the plants the spacing will hold.
Population
26,136plants
Per acre26,136
Square feet each1.67
Acres1.00
Planning estimate from the numbers you enter. Coverage, density, waste and price are assumptions, not a supplier quote or an engineering specification.
How it works
Each plant owns row spacing times in-row spacing.
Square feet per plant equal the two spacings in inches, multiplied, then divided by 144. Plants per acre equal 43,560 divided by that area. Thirty inch rows and 8 inch plant spacing are 1.67 square feet per plant and 26,136 plants per acre. One acre at that spacing is 26,136 plants. The page multiplies by the acre field, which defaults to 1. Skip plants are not removed. Germination percent is not applied. If you want a seed drop rather than a stand, raise the population yourself or lower the spacing. Headlands and end rows are not subtracted.
02
Example
30 inch rows, 8 inch plants, 1 acre.
Each plant gets 1.67 square feet. Population is 26,136 plants. Two acres would be 52,272 plants at the same spacing. The plant spacing calculator does not change the spacing. You do.
03
Tips
Measure the spacing you can actually drive.
A planter that drifts from 30 inches to 32 inches changes the population. Use the spacing you will plant, not the spacing you wish the book used. Twin rows need a different area per plant than a single row. Add the bands yourself before you type one row spacing.
04
Equipment
The planter is the machine that holds the spacing.
Dengaro arranges financing for a planter or a tractor. Plant count is not a loan amount.
Important questions
Know what to expect.
Why 43,560?+
That is the number of square feet in an acre. The population is an acre of those small rectangles.
Does this include germination?+
No. It is a geometric count. A 90 percent stand is 90 percent of the result. Apply that after you read the page.
Can I enter centimeters?+
Not directly. Convert to inches first. The 144 in the formula is square inches per square foot.
What about a broadcast seeding?+
This form is for rows. A broadcast rate in pounds per acre belongs on the grass seed calculator or the fertilizer calculator, depending on what you are spreading.
Financing built into the sale