How Many Trees Per Acre? The Complete Spacing Reference
2.5m × 2.5m → 647 trees per acre (1,600 per hectare). 3m × 3m → 450 per acre (1,111/ha). 2m × 2m → 1,012 per acre (2,500/ha). 10ft × 10ft → 436 per acre.
The formula for any spacing: trees per acre = 4,046.86 ÷ (spacing A × spacing B in metres). For hectares, divide 10,000 by the same figure.
The Answer, By Spacing
| Spacing (metric) | Trees / acre | Trees / hectare | m² per tree |
|---|---|---|---|
| 1m × 1m | 4,047 | 10,000 | 1.00 |
| 1.5m × 1.5m | 1,799 | 4,444 | 2.25 |
| 2m × 2m | 1,012 | 2,500 | 4.00 |
| 2m × 2.5m | 809 | 2,000 | 5.00 |
| 2m × 3m | 674 | 1,667 | 6.00 |
| 2.5m × 2.5m | 647 | 1,600 | 6.25 |
| 2.5m × 3m | 540 | 1,333 | 7.50 |
| 3m × 3m | 450 | 1,111 | 9.00 |
| 3m × 4m | 337 | 833 | 12.00 |
| 4m × 4m | 253 | 625 | 16.00 |
| 5m × 5m | 162 | 400 | 25.00 |
| 6m × 6m | 112 | 278 | 36.00 |
| 8m × 8m | 63 | 156 | 64.00 |
| 10m × 10m | 40 | 100 | 100.00 |
The Formula
Two lines of arithmetic
- Area per tree = spacing A × spacing B (in metres)
- Trees per acre = 4,046.86 ÷ area per tree
- Trees per hectare = 10,000 ÷ area per tree
- Worked: at 2.5m × 2.5m, area per tree = 6.25 m². 4,046.86 ÷ 6.25 = 647. 10,000 ÷ 6.25 = 1,600.
- Imperial version: trees per acre = 43,560 ÷ (spacing A × spacing B in feet). At 10ft × 10ft: 43,560 ÷ 100 = 436.
Imperial Spacings
| Spacing (feet) | Trees / acre | Trees / hectare | Metric equivalent |
|---|---|---|---|
| 4ft × 4ft | 2,723 | 6,727 | 1.22m × 1.22m |
| 6ft × 6ft | 1,210 | 2,990 | 1.83m × 1.83m |
| 8ft × 8ft | 681 | 1,682 | 2.44m × 2.44m |
| 10ft × 10ft | 436 | 1,076 | 3.05m × 3.05m |
| 12ft × 12ft | 302 | 747 | 3.66m × 3.66m |
| 15ft × 15ft | 194 | 478 | 4.57m × 4.57m |
| 20ft × 20ft | 109 | 269 | 6.10m × 6.10m |
| 6ft × 8ft | 908 | 2,243 | 1.83m × 2.44m |
| 8ft × 10ft | 545 | 1,345 | 2.44m × 3.05m |
Triangular Layouts Fit About 15% More
A square grid places every tree at the corner of a square. A triangular (offset or quincunx) layout shifts alternate rows by half a spacing so each tree sits in the gap of the row beside it.
- Area per tree = A × B × 0.866 for equilateral triangular spacing.
- At 2.5m that is 5.41 m² per tree instead of 6.25 — about 748 trees per acre instead of 647.
- More even canopy closure and better ground utilisation.
- Harder to set out and harder to run machinery through in straight lines, which is why most commercial plantations still use square grids.
Working out a real block, not just a number? We assess sites worldwide.
How Many to Actually Order
The chart assumes ground that is 100% plantable. It never is. Before ordering:
- Deduct 5–15% for firebreaks, access and extraction roads, boundary setbacks, and unplantable ground — rock, gullies, waterlogged hollows, structures.
- Add back about 5% as replacement stock for seedlings that fail in the first weeks. Filling gaps promptly is the difference between roughly 80% and 95% final stocking.
Worked example. One acre at 2.5m × 2.5m: chart says 647. Less 10% unplantable = 582. Plus 5% replacements = order about 610.
Choosing Your Spacing
| Objective | Typical spacing | Reasoning |
|---|---|---|
| Biomass, firewood, charcoal | 1.5–2m | Selling volume and weight; individual stem quality is irrelevant |
| Pulpwood | 2–2.5m | High stem count, short rotation |
| Poles | 2.5m | Fast canopy closure suppresses weeds; straight stems at pole diameter |
| Sawlogs | 3–4m plus thinning | Diameter needs growing space and time |
| Agroforestry / intercropping | 3×4m or wider | Workable alleys for two to three seasons of crops |
| Orchards / nut crops | 5–10m | Full crown development and harvesting access |
| Poor or shallow soil | Wider than the book says | The site cannot carry full stocking to merchantable size |
Tighter is not more valuable. Beyond what a site can carry, extra stems compete rather than add volume, and you finish with a dense stand of thin stems that buyers discount heavily. This is the most expensive misconception in smallholder forestry worldwide.
Typical Spacing by Species
| Species | Common spacing | Trees / acre | Grown for |
|---|---|---|---|
| Eucalyptus (poles) | 2.5m × 2.5m | 647 | Building and transmission poles |
| Eucalyptus (fuelwood) | 2m × 2m | 1,012 | Firewood, charcoal |
| Pine (sawlogs) | 3m × 3m | 450 | Construction timber, with thinning |
| Teak | 3m × 3m | 450 | Premium timber, pruned |
| Poplar | 4–6m | 112–253 | Veneer, board |
| Oak / slow hardwood | 2–3m then heavy thinning | 450–1,012 | Quality timber over long rotation |
| Coffee (shade system) | 2m × 2.5m | 809 | With scattered shade trees at 8–12m |
| Oil palm | ~9m triangular | ~57 | Fruit bunches |
These are starting points, not prescriptions. Local yield tables and species trials always beat a generic figure — and site quality moves the right answer more than species does.
Frequently Asked Questions
How many trees can you plant on one acre?
It depends entirely on spacing. At 2.5m × 2.5m you fit about 647 trees per acre; at 3m × 3m about 450; at 2m × 2m about 1,012; at 10ft × 10ft about 436.
The formula for any spacing: divide 4,046.86 (square metres in an acre) by the area each tree occupies in square metres.
How many trees per hectare at 3m x 3m?
1,111 trees per hectare, which is about 450 per acre. Each tree occupies 9 square metres, and 10,000 ÷ 9 = 1,111.
This is a common spacing for pine sawlogs and for teak, both of which need room to put on diameter.
What is the formula for trees per acre?
Trees per acre = 4,046.86 ÷ (spacing A × spacing B in metres). In imperial units: 43,560 ÷ (spacing A × spacing B in feet).
For triangular or offset rows, multiply the area per tree by 0.866 first — that layout fits about 15% more stems at the same tree-to-tree distance.
Should I plant trees closer together to get more timber?
More stems, but not necessarily more value. Beyond what a site can carry, trees compete with each other and you end up with a dense stand of thin stems that buyers discount heavily or refuse outright.
Value comes from stems reaching saleable diameter. On poorer soils in particular, wider spacing produces a more valuable crop.
How many seedlings should I order per acre?
Take the chart figure, deduct 5–15% for firebreaks, roads, boundary setbacks and unplantable ground, then add back about 5% as replacement stock for early failures.
On one acre at 2.5m × 2.5m that means ordering roughly 610 plants rather than 647.
Does this work for fruit trees and orchards too?
The geometry is identical for any plant grown in a grid — timber, fruit, nuts, coffee, oil palm.
What changes is the appropriate spacing, which for orchards is far wider (5–10m) because you need full crown development and harvesting access rather than straight stems.
From a Number to a Planting Plan
The arithmetic is the easy part. Matching species to soil, laying out firebreaks and access, and timing the planting is where blocks succeed or fail.
Over a decade establishing, measuring and managing eucalyptus, pine and indigenous plantations across Uganda. Based in Wakiso, Kampala. Reviewed and updated September 6, 2026.
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