The calophyllum inophyllum is a potential source of non-edible vegetable oil for producing biodiesel because of its ability to grow in a wide range of climate conditions, easy cultivation, high fruit production rate, and the high oil content in the seed. The biodiesel is extracted through transesterification process with methanol and NaOH as catalyst. The biodiesel was blended with diesel by various percentages such as B0, B25, B50, B75 and B100. The blends were prepared on a volume basis. Density, kinematic viscosity, flash point and fire point, these are the four main fuel properties that were investigated. The results showed that the density, viscosity, flash point and fire point of diesel fuels (B0) are lower than the calophyllum inophyllum biodiesel (B100). Therefore, the density, viscosity, flash point and fire point of the blend increases with the increase of biodiesel concentration.