This page will help you calculate the figures a New York judge would consider in determining how much should be paid in maintenance and child support. Worksheets to calculate guideline amounts of maintenance and child support.Optional tools to help with calculations are below. Many people across New York state use the Maintenance and Child Support Calculator we offer on our website (the "Calculator"). Calculate temporary or post-divorce spousal alimony as well as child support. This calculator is courtesy of Joy S. Rosenthal, Esq. New York Alimony or Maintenance Calculator that calculates alimony or maintenance payable based on a state formula. This calculator provides an estimate for a single source of income. Fill in your income, the number of children, and custody arrangements for child support. The amount of child support that either parent may have to pay following a divorce is based on several factors, and one of those factors is alimony.