Worksheets to calculate guideline amounts of maintenance and child support. Optional tools to help with calculations are below.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. Existing child support orders must be protected when calculating alimony in a subsequent marriage. Use our calculator to get a quick, approximate estimate for child support and maintenance payments in New York. New York Alimony or Maintenance Calculator that calculates alimony or maintenance payable based on a state formula. Calculating Debt Payoff. If you have unpaid child support debt, you can figure out how long it will take to pay it off with our Arrears Payoff Calculator. This article and video explain spousal maintenance (alimony) in Washington State. They also explain undifferentiated family support.