The behavior and design of reinforced concrete members subjected to shear remain an area ofrnmuch concern and investigation. This is particularly due to the less knowledge on shearrnresistance mechanism of RC structures in one extent and also shear is affected by a number ofrnfactors which are not interdependent to eachother. In addition to this many structures were failedrndue to shear throughout the world. Several researches and proposals were developed forrnpredicting the shear strength of beams in different times by different scholars throughout thernengineering world. Most of them were empirical formulations designed to fit the limited set ofrnexperimental results for shear. rnAlso different countries adopted design codes based on test results and these codes arerncontinuously changing which necessitates a method that performs further checks on thernperformance of structures which were designed and constructed based on the previous codesrnwhich became outdated. Due to this it is very essential to adopt a theory which forms its basisrnmainly on the mechanics of members and which gets verified by experimental findings. One ofrnsuch method is modified compression field theory which is an extension of the compression fieldrntheory. It is an analytical model that is largely based on experimental results from University ofrnTorronto by Vecchio and Collins. rnParticularly, to Ethiopia, where a new code is adopted it is very important to have a tool to assessrnthe performance of structures subjected to shear. So this study presents a tool that can perform rnshear capacity check based on MCFT using Microsoft visual basic mathematical programming rnlanguage. The results from the tool are compared with the available codes of ACI and Euro code.rnWith this regard, the shear capacities of all sections obtained by modified compression fieldrntheory is greater than that of both the Euro code values and the ACI values as also indicatedrnin previous works of Surafel Tsegaye. Also, the Euro code values are the least values amongrnthe three because in Euro code the shear is assumed to be resisted by the shearrnreinforcements only. On the otherhand for continuous beam sections relatively consistentrnresults were obtained.