Use the below Example to determine Tree Size Diameter. Place this information on the Architectural change form.
Measure the circumference of the tree with a tape measure then take that number and divide by Pi (3.14).
Take the Circumference of the tree and divide it by Pi (3.14) to compute the diameter breast height (DBH)
Read the number, in inches, where the measuring tape reaches the starting point and end of the tape. This is the tree's circumference at breast height.
Divide the circumference by 3.14, or Pi. The resulting number is the tree's DBH.