In powder bed fusion additive manufacturing properties of the melt pool are of deep interest to ensure the structure of the nal product is as desired. Speci cally of concern in this work is estimating the melt pool with regards to width and depth considering also maximum temperature. Because analytic estimation formulas require simpli ed assumptions, OpenFOAM is used to numerically simulate the melt pool as well. The approximation formulas are compared to the numerical simulations and experiment data to validate.