What is DBH ?

DBH is defined as the average stem diameter outside bark at the point of 1.3m or 1.37m (FAO) above the ground as measured.

• It is a convenient height for taking measurement as it does not require bending down or stretching up to reach a lower or higher point.


• It is a place on a tree stem, which is free from obstructions from thorny shrubs  and abnormalities like root swell, etc.


• It gives uniform point of measurement and therefore standardizes measurement.


• It shows strong correlation to the volume or weight of the stem for most tree species.