this calculation includes tables and calculations for easy option of fits of machine parts and determination of their dimensional tolerances and deviations. application is developed in ms excel, is multi-language, supports imperial and metric units and solves the following main tasks: - selection of suitable fits of machine parts according to the international standard iso 286. - determination of dimensional tolerances and deviations of machine parts according to the international standard iso 286. - selection of preferred fits of machine parts and determination of their dimensional tolerances and deviations according to ansi b4.1. - determination of non-prescribed limit deviations of linear and angular dimensions according to iso 2768. - automatic design of a fit for the given clearance or fit interference respectively. the data, procedures, algorithms and specialized literature and standards ansi, iso, din and others were used in the calculations. used standards: ansi b4.1, ansi b4.2, iso 286, iso 1829, iso 2768, en 20286, jis b 0401this module is a part of mitcalc - mechanical and technical calculation package for gear, belt and chain drives, springs, beam, shaft, bolt connection, shaft connection, tolerances and many others.