Custody Overnight Split Calculator
Many child support formulas and parenting plans hinge on the percentage of overnights each parent has. Enter your custody cycle details to calculate the annual overnight split.
About this calculator
Calculate the percentage split of overnights between parents over a custom schedule cycle to support parenting time and support calculations.
Frequently Asked Questions
Why does the overnight percentage matter for child support?
Many states use overnight percentage as a factor in child support guideline calculations, since more overnight time generally corresponds to more direct expenses for that parent.
How do holidays and vacations factor in?
Most parenting plans include special holiday and vacation schedules that override the regular cycle. This calculator lets you add net extra nights from those arrangements to the base cycle count.
Is 50/50 always exactly 182.5 nights each?
In a 365-day year, an exact 50/50 split isn't always possible since you can't split a night; many schedules alternate which parent gets the extra night each year.