Office of Recovery Services Child Support Calculator. The following worksheets are intended only as a guideline for estimating child support.Unlike child support in Utah, there is no formula for judges to use to calculate alimony in a divorce. Child support is calculated using the gross monthly income of both parents and the number of overnights the child spends in each household. You can calculate your possible child support payment amount two ways: online, using our Child Support Calculator, or on paper, using worksheets. See how parenting time affects the total. Alimony, sometimes referred to as spousal support, is the court-ordered money that one party pays to the other party for support while they are separated. The following calculator provides an estimate of a potential alimony award in the State of Utah. Our tool will calculate how much spousal support a judge may order. Complete the fields to calculate and estimate.