Tree Canopy Coverage Calculator

Using representative average radii for small, medium, and large trees lets you get a useful coverage estimate from a quick tree count rather than requiring you to measure every individual tree's actual canopy spread, which varies significantly even within a size category depending on species and age. If you know your trees' actual canopy diameters differ meaningfully from these averages, you can mentally adjust the estimate accordingly.

It reflects a commonly cited target in urban forestry and municipal tree-canopy planning programs, generally considered a healthy coverage level that delivers meaningful shading, stormwater absorption, and air quality benefits in many climates. Actual recommended targets vary by region, climate, and local urban forestry goals, so check whether your municipality publishes its own specific target if you're benchmarking against local policy.

Medium canopy size is used as a reasonable middle-ground planning assumption since it sits between the small and large tree categories, giving a workable estimate without requiring you to commit to a specific planting plan first. If you actually plan to plant large mature-canopy species instead, you'd need fewer of them to close the same coverage gap; more small trees would be needed to reach the same target.

It applies a flat, commonly cited planning rate per square foot of canopy that bundles several distinct benefits — stormwater management, air quality, carbon sequestration, and cooling — into one number, but real ecosystem service value varies significantly by climate, local utility rates, tree species, and regional environmental conditions. Treat it as a useful illustrative planning figure for comparing scenarios, not a precise dollar appraisal specific to your property.