Worksheets to calculate guideline amounts of maintenance and child support. Optional tools to help with calculations are below.New York Alimony or Maintenance Calculator that calculates alimony or maintenance payable based on a state formula. Specific factors are determined in calculating spousal support in New York including income of both parties and the duration of marriage. Basic Calculation: DETERMINE WHICH FORMULA APPLIES BY CHECKING THE BOXES BELOW: QUESTION A: Will child support be paid for childrenof the marriage? And Family Court Act 412. 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. How is it calculated? Your divorce lawyer in New York will explain the two main methods for calculating alimony. Your divorce lawyer in New York will explain the two main methods for calculating alimony.