The diameter-at-breast-height (DBH) of a tree’s trunk is measured 4.5 feet above the ground. To find the diameter of a tree, first measure the circumference as shown in the first image below. Then divide the circumference by 3.14. The result will equal the diameter of the tree. Refer to the second image below for reference of these terms.
In cases where trees have multiple trunks, use the image below for guidance on how to measure these trees.