Worksheets to calculate guideline amounts of maintenance and child support. Optional tools to help with calculations are below.Couples and the courts can use NYS spousal maintenance calculators to decide on the amount to be paid. Use this free calculator to calculate spousal support according to the Canadian Spousal Support Advisory Guidelines, as well as child support (if applicable). You should keep in mind that this free online calculator only considers employment income and can only do simple calculations. 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. "Spousal support" is the money that one spouse may have to pay to the other spouse for their financial support following a separation or divorce. To determine how much spousal support is required, calculate your gross income. This is the amount of money you make after taxes and other deductions. The Divorce Act applies to married couples who are divorcing.