About this tool
Tree Spacing Calculator is a free, in-browser tool for planning an orchard, vineyard row or windbreak. Enter the distance between rows and the distance between trees within a row and it returns the planting density in trees per acre, or switch to plot mode to see how many trees fit a rectangle you measure. Nothing is uploaded — every figure is computed on your device as you type.
Trees per acre is 43,560 ÷ (row spacing × in-row spacing), because an acre is 43,560 square feet and each tree occupies a rectangle of those two dimensions. In plot mode the tool counts whole rows and whole trees: rows = floor(width ÷ row spacing), trees per row = floor(length ÷ in-row spacing), and total = rows × trees per row, so partial rows are never counted. Spacing presets fill in typical values for dwarf, semi-dwarf and standard fruit trees.
Use the per-acre figure to compare layouts and order stock for a large block, and use plot mode to lay out a specific garden bed or backyard row. Wider spacing lowers the count but gives each mature tree more light, root room and airflow.