A software “Crop Coefficient Estimator and Irrigation Scheduler (CCEIS)” was developed for crop coefficient estimation and irrigation scheduling of wheat, maize, soybean and mustard crop using JAVA programming language. The background data base of the software comprised of crop coefficients of mustard, wheat, maize and soybean acquired from lysimeter experiment. It was developed using water budgeting protocol in which irrigation scheduling is suggested based on crop evapotranspiration and soil moisture information. The CCEIS software comprised of a computational module, graphic user interface (GUI) and background databases. Computational module includes calculation methods for estimation of crop coefficient values and preparation of irrigation schedules which uses soil parameters, crop parameters, climatic parameters and irrigation methods as input data. CCEIS software was tested under different scenario to predict crop evapotranspiration and irrigation scheduling of selected crops. Developed software is user-friendly having flexibility of periodic updation which can be used for judicious irrigation scheduling for enhancing water productivity of crops and cropping system of the region.