The calculator gives an annual child support estimate. Orders are paid weekly, biweekly, monthly, or bimonthly.Worksheets to calculate guideline amounts of maintenance and child support. Optional tools to help with calculations are below. A calculator for determining temporary maintenance and child support payments in New York State. Both parents' incomes are used to figure out how much child support the father has to pay because both parents have to support their children. Read on to find out how child support is calculated in New York. If you are going through a divorce in New York, one question you may be asking is how to calculate alimony. One of the first steps in the child support process is identifying the child's parents. The formula uses the parties' incomes and salary, as well as whether or not child support is being paid to perform a calculation.