What Is the Tree Spacing Calculator?
The Tree Spacing Calculator estimates how many trees you can plant per acre based on the distance between rows and the distance between trees within each row. It is widely used in orchards, vineyards, plantation forestry, and reforestation projects to plan planting density, order seedlings, and budget land use.
How to Use It
Enter your row spacing (the distance between planting rows, in feet) and your tree spacing (the distance between trees along a row, in feet). Optionally enter your total planting area in acres. The calculator returns the trees per acre and the total number of trees needed for your area.
The Formula Explained
One acre equals 43,560 square feet. Each tree occupies a rectangle of land equal to its row spacing multiplied by its in-row spacing. Dividing 43,560 by that rectangle gives the number of trees that fit in an acre:
$$\text{Trees per Acre} = \dfrac{43{,}560}{\text{Row Spacing} \times \text{Tree Spacing}}$$
This is a square/rectangular grid estimate. Triangular (offset) layouts can fit roughly 15% more trees, and edge effects in small plots reduce the count slightly.
Worked Example
Suppose you plant rows 12 ft apart with trees 10 ft apart in the row. Each tree occupies \(12 \times 10 = 120\) ft². Trees per acre = $$43{,}560 \div 120 = 363 \text{ trees}.$$ On a 5-acre block you would need about \(363 \times 5 = 1{,}815\) trees.
FAQ
Does this account for triangular spacing? No — it assumes a rectangular grid. For offset/staggered layouts, multiply the result by about 1.15.
What about borders and roads? The formula uses the full acre. Subtract space for headlands, roads, and drainage to get a practical figure.
Can I use metric units? This tool uses feet and acres. Convert meters to feet (1 m ≈ 3.281 ft) before entering values, or use a metric planting-density tool.
