Tree Diameter Calculator

Find tree diameter from its circumference.

Diameter 12.096

Formula: diameter = circumference ÷ π

Step-by-step with your numbers:

1. Values used:

2. Circumference = 38

4. Diameter = 12.096

Did we solve your problem today?

Convert a tape-measured trunk circumference into diameter (DBH).

The math behind it

diameter = circumference ÷ π.

38 in around → 12.1 in DBH.

Where to measure?

At breast height — 4.5 ft above the ground.