Forests on the campuses of Griffith University contribute a range of ecosystem services and functions including sequestering carbon, and hence are an important component of Griffith University’s Sustainability Goals including United Nations Sustainable Development Goal (UNSDG) 13: Climate Action and UNSDG 15: Life on Land. This includes the 5.2 ha Arboretum at the Logan campus of Griffith University. To estimate the carbon sequestered in the Arboretum over the initial nine years of growth, field work was undertaken in 2023. Specifically, Above Ground Biomass was estimated by converting measurements of the height and width of all woody plants and standing dead trees with a Diameter at Breast Height (DBH) of at least 5 cm in 10m by 15m randomly located quadrats in each of 28 blocks of forest in the Arboretum using standard allometric calculations. These field values were then converted to tons of Above Ground Carbon per ha (38.9 t C ha‐1 ) which was then combined with area of the Arboretum (5.2 ha trees) to give a final estimate of the amount of Above Ground Carbon (192.5 t carbon) as well as both Above and Below (in roots) Ground Carbon in woody plants (240 t carbon). These results demonstrate the importance of the Arboretum where an open area of grass has been turned into a high biodiverse urban forest consisting of over 3,500 trees in 2023 representing 56 species that is cooling the Logan campus, conserving soil, providing habitat for wildlife and wellbeing benefitsfor staff,students and visitors. It has also already sequestered about 29% (Gold Coast) or 27% (Nathan) of the carbon in the native forests on the other campuses. Ongoing management of Arboretum and other wood vegetation on the Logan campus including trees in the Slakes Creek restoration forests, formal gardens and the small area remnant forest at the Logan Campus of Griffith University will ensure they continue to provide benefits including carbon sequestration.