The Indiana Supreme Court has an online child support calculator and we encourage current and potential clients to experiment with the calculator. To progress through the site to the calculator, click the red 'Select a Child Support Calculator' button. We recommend that you pick the first option: Online Step-by-Step Calculator. Of course, please keep in mind that the results provided by the calculator are not official until approved by a judge. Child support situations can fit into the guidelines neatly, but often there are special circumstances that mean a parent may need to deviate from the guidelines.