ISO 5660 cone calorimeter experiments were simulated using Fire Dynamics Simulator (FDS) in the present study. PMMA (Poly Methyl-Methacrylate) which does not produce Char during pyrolysis process was used as solid fuel. The experimentally measured mass loss rate and heat release rate in the ISO 5660 cone calorimeter experiments were then compared with those numerically calculated from the FDS simulation.