This diploma thesis ,,Optimization of the parking plannig and calculation“ is focused to the problem of determining the number of parking spaces. The goal of this thesis is to update purpose units in the selected buildings and optimization of factors in calculating the parking spaces. The fírst part of  work consist of compared calculation car parking  spaces to the Czech standards with standards in other countries. The second part of work is focused of comparison of calculated parking places according to standards with real number of parking places. The last part of diploma thesis is concentrated to optimizing the reduction factors.