Use this worksheet when (a) Parents share custody of all the children for whom support is being determined, or (b) when one parent has primary physical custody. This calculator determines the value of child support to be paid based on income, days the children spend in your custody, and other child-related expenses.Our North Carolina Child Support Calculator will automatically calculate your standard child support and allow you to download it in pdf format. Use our child support calculator to provide an estimate of the child support payments the court may order you to pay in NC.. Call us today at . Use this worksheet when one parent (or a third party) has primary physical custody of all of the children for whom support is being determined. See how parenting time affects the total. This calculation is based on North Carolina Child Support Guidelines and will calculate child support based on a primary, shared or split custody arrangement. Use our free child support calculator to calculate the estimated order for your NC child support regardless of whether you have sole, joint, or split custody. The NC child support calculator is another resource intended to help parents determine how much money they will pay in monthly child support. Alimony (sometimes called "spousal support") is meant to provide financial assistance for a spouse who may need it before and after divorce.