For Joint Custody only, How many overnights will the children from Question 5 stay with each parent? See how parenting time affects the total.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. To calculate the amount of support under Utah's current child support guidelines, you can use the official Utah Child Support Calculator. You may use this worksheet and instructions to MANUALLY CALCULATE the child support obligation using the table found in Utah Code 81-6-304. The following calculator provides an estimate of a potential alimony award in the State of Utah. The following Utah child support obligation calculators can give you some guidance on "how much I have to pay for child support". New 2022 Utah Maintenance Calculator. This 2022 Utah alimony calculator makes Utah alimony calculations.