Arboriculture, DBH Calculator, SRZ Calculator, TPZ Calculator, Tree Canopy, Treetec DBH, TPZ and SRZ Calculator TPZ / SRZ CALCULATOR | ENCROACHMENT (Aligned with AS 4970-2009) DBH calculator Use the calculator below to determine the Diameter at Breast Height (DBH) of a multi-stemmed tree. Use the red boxes to input the measurements, always in metres e.g. 65 cm calliper - … Continue Reading ›› Melbourne Arborist Treetec Facebook Treetec Twitter Treetec Instagram