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Plant Population Per Acre Calculator

Work out plant population per acre instantly with clear inputs, formula shown and shareable results.

About Plant Population Per Acre Calculator

Plant population is decided entirely by geometry: each plant occupies row spacing x plant spacing, so a hectare holds 10,000 / (row x plant) plants in metres. Subtracting expected gaps and mortality converts the theoretical population into the stand you can expect to harvest.

Formulas

Plant population

Plants per hectare = 10,000 / (row spacing (m) x plant spacing (m))

Standing plants

Standing = population x area x (1 - gap %)

Worked example

With the default values below, Plant Population Per Acre Calculator returns Plant Population Per Acre of 44,965. Change any input above and every figure here is recalculated in your browser.

Inputs used

Row To Row Spacingminimum 1 cm
45 cm
Plant To Plant Spacingminimum 1 cm
20 cm
Areaminimum 0.01 acre
1 acre
Expected Gaps / Mortalityaccepts 0–50 %
5 %

Results

Plant Population Per Acre
44,965
Plants Per Hectare
111,111
Expected Standing Plants
42,717
Area Per Plant
900.0

Step by step

  1. 1Values used
  2. 2Plant population
  3. 3Standing plants
  4. 4Plant Population Per Acre= 44,965
  5. 5Plants Per Hectare= 111,111
  6. 6Expected Standing Plants= 42,717
  7. 7Area Per Plant= 900.0

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why does population matter more than seed rate?

Yield responds to plants per unit area, not kilograms of seed. Two lots with different seed size and germination need different seed rates to reach the same population.

How do paired or skip rows change this?

Use the average of the narrow and wide row spacings as the effective row spacing, then apply the same formula.

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