Parenting Time Percentage Calculator - Illinois

The standard model divides annual overnights by 365 and converts that to a percentage. This metric is widely used in custody and support worksheet contexts. It is a planning metric, not a custody order by itself.

Both states use UCCJEA-based frameworks, but implementation details differ through state statutes and local court practice. Texas Family Code § 152.201 is a key jurisdiction provision. California applies parallel Family Code jurisdiction concepts under its UCCJEA adoption.

Overnights often drive worksheet inputs that influence support calculations and parenting-plan evaluation. Small overnight changes can shift support transfers meaningfully when parental incomes are far apart.

No. It does not award conservatorship, legal custody, or decision-making rights. Courts evaluate best-interest factors and evidence under state law; this calculator only quantifies overnight allocation.

Yes, if you aggregate school-year, summer, holiday, and special-period schedules into annual overnights. One-period assumptions can misstate real yearly allocation and create avoidable worksheet disputes.

Track actual overnights with verifiable records. Courts and agencies may rely on documented practice where orders and reality diverge materially. Record quality is critical in enforcement or modification proceedings.

Not automatically, but it is often a major support input. Final support still depends on state guidelines, income evidence, add-ons, and judicial findings. Use this as an input component, not a final order proxy.

It is most vulnerable when overnight records are inaccurate, schedules are mid-transition, jurisdiction is contested, or orders contain non-standard time allocations. Worksheet assumptions should be validated against actual parenting patterns.