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. New York Alimony or Maintenance Calculator that calculates alimony or maintenance payable based on a state formula. The New York government website offers an online calculator that can help you determine how much child support you will be responsible for. A spouse can file a petition in New York Family Court for the other spouse to pay spousal support even if they have not yet filed for divorce. New York uses a specific percentage calculation for child support. It takes the incomes of both parents into account. In New York State, a married person may file a petition in Family Court seeking spousal support from a current husband or wife. The formula uses the parties' incomes and salary, as well as whether or not child support is being paid to perform a calculation.