Biology
Find how many trees fit per acre at a chosen row and in-row spacing.
Your inputs
Change any value — everything updates instantly.
Distance between rows.
Distance between trees in a row.
Planting area.
Try an example
Trees per acre
363 trees
This means you can plant about 363 trees across your area.
What you are seeing
Each green dot is a tree planted along a row.
Rows are 12 ft apart, trees 10 ft apart.
Each tree gets 120 ft² of ground.
For your area
363 trees
Rounded down to whole trees.
Per hectare
897 trees
Metric density.
Space per tree
120 ft²
Row × in-row spacing.
Result explanation: Planting density
363 trees per acre.
Real-life comparison: At 14 ft rows: 311 per acre.
Low, normal or high? A typical spacing for orchards or timber.
Trees per acre against in-row spacing
How to read this chart: Closer spacing sharply increases the tree count.
Divides an acre by the ground each tree occupies.
363 trees per acre.
Mature crown size should guide spacing.
Edges and paths reduce the real count.
Acre area divided by space per tree.
TPA = 43,560 ÷ (row × in-row)
Symbols
Why this formula works
Each tree occupies one rectangle of ground.
Unit check
ft² ÷ ft² = trees ✓
Worked example
Common mistakes
Plant about 363 trees.
Roughly the expected mature crown width, less for windbreaks.
An offset layout fits about 15% more trees; this tool uses a square/rectangular grid.
Some growers add 5–10% to replace losses.
The per-hectare figure is shown in the cards.
Important limitation. Does not subtract roads, edges or obstacles.
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
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