Custody Overnight Split Calculator
Enter the number of overnights each parent has in a typical two-week cycle to see the annualized percentage split and total nights per year.
About this calculator
Calculate each parent's percentage of overnights per year based on a custody schedule to help understand parenting time splits and support implications.
Frequently Asked Questions
Why does overnight percentage matter?
Many states use the percentage of overnights each parent has as a key factor in calculating child support and determining custody classifications like joint or primary physical custody.
How is the cycle length used?
Custody schedules often repeat on a set cycle (e.g., every 14 days). This calculator annualizes that cycle to estimate total nights per year for each parent.
Should I include holiday and vacation time separately?
Yes, use the extra nights field to account for holiday or summer schedules that differ from your regular rotation, since these can shift the overall percentage split.