We present the computer program FeynCalc for automatic algebraic calculation of Feynman amplitudes. The purpose of the package is to facilitate the process of calculating radiative creections in renormalizable gauge theories. We have use th eporgram to calculate tree level diagrams as well as 1- and 2- loop corrections in the Standard model. The package is written in the computer algebra languages Macsyma as well as Mathematica allowing the necessary degree of generality.