Agroforestry Spacing Calculator
Plant Spacing and Seeding Rate Calculator works out Plants that fit and Seed rate required from Calculation, Row spacing and Spacing within the row. The default figures on this page give plants that fit of 0.555556; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- Each plant occupies 30 x 6 = 180 units of area.
- 100 / 180 = 0.5556 plants.
- At that spacing an acre holds 34848 plants.
Its 4 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
4 sources
What the Plant Spacing and Seeding Rate Calculator calculates
Works out how many plants fit an area at a given spacing, and the seeding rate and in-row spacing needed to reach a target established population.
How to use this Plant Spacing and Seeding Rate Calculator
Enter Calculation, Row spacing, Spacing within the row and Area to plant. Plants that fit updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Plants that fit, Seed rate required and Row length per acre or hectare.
The method follows Penn State Extension, Calculating the Price of Pure Live Seed, University of Minnesota Extension, seeding rate for small grains, Stand counts scale a sampled area to the whole field by the exact acre and hectare constants. and Row length per acre = 522,720 / row spacing in inches.
Research R215-GT-1: 2 by 2 spacing over 100 units of area example
With Calculation: population, Row spacing: 2, Spacing within the row: 2, Area to plant: 100, the calculator returns Plants that fit: 25. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Plants that fit, Seed rate required and Row length per acre or hectare. The inputs you can vary are Calculation, Row spacing, Spacing within the row, Area to plant, Target established population and Germination.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
What information do I need for the Plant Spacing and Seeding Rate Calculator?
You need Calculation, Row spacing, Spacing within the row, Area to plant, Target established population, Germination, Field establishment and Units. The page opens with default figures that give plants that fit of 0.555556, so you can see the scale before entering your own.
What does this Plant Spacing and Seeding Rate Calculator show?
It shows Plants that fit, Seed rate required, Row length per acre or hectare, Seeds per foot or metre of row, Spacing between seeds in the row and Plants per acre or hectare at this spacing, with the working and any warnings for your entries.
Can I check how the Plant Spacing and Seeding Rate Calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.