Office of Recovery Services Child Support Calculator. The following worksheets are intended only as a guideline for estimating child support.You can calculate your possible child support payment amount two ways: online, using our Child Support Calculator, or on paper, using worksheets. Child support is calculated using the gross monthly income of both parents and the number of overnights the child spends in each household. See how parenting time affects the total. To calculate the amount of support under Utah's current child support guidelines, you can use the official Utah Child Support Calculator. The following calculator provides an estimate of a potential alimony award in the State of Utah. 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 Utah child support obligation calculators can give you some guidance on "how much I have to pay for child support". The Utah Child Support Calculator lets you know your child support award or obligation.