The topic of concern in this project is room fire growth to flashover. The objective is to develop scaling rules for flashover time and to apply these rules to certain existing room fire flashover test data. In this report, the scaling rules are deduced from first principles of energy and mass conservation describing the physics of fire growth. The nondimensional scaling parameters are all obtained in the desirable terms of fundamental combustion properties. Collection, estimation, and deduction of these fundamental properties for the materials involved in the concerned fire tests has to be done in the immediate future to evaluate the scaling parameters for correlating the test data.