Custody Schedule Calculator

A multi-week summer arrangement typically supersedes the regular weekly schedule entirely for that stretch of the calendar, so simply adding summer weeks on top of the regular annualized total would double-count days the regular schedule already accounted for during that period. The calculator instead nets the actual summer days against what the regular pattern would have produced over those same weeks, only counting a net gain once the summer arrangement clearly exceeds that baseline.

No — this field is collected for context about how many holiday days total are being divided, but the calculation adds Holiday Days with Parent 1 directly on top of the regular annualized schedule without netting it against a proportional regular-schedule baseline the way summer weeks are. If your holidays substitute for what the regular schedule would have given a parent anyway, treat the resulting percentage as a rough approximation rather than an exact accounting.

They express what share of annual overnights each parent has under the schedule you entered, which many courts and co-parenting agreements use as shorthand — for example, distinguishing a joint physical custody arrangement (generally near 50/50, sometimes defined as anywhere from 35% up) from sole or primary custody with the other parent exercising visitation. The exact percentage thresholds that matter legally vary by state, so check your jurisdiction's specific definitions before relying on a single number.

Not directly — while many states' child support formulas do factor in parenting time percentage, often through an income-shares or percentage-of-income model with its own specific rules, the exact calculation typically requires additional inputs like each parent's income and state-specific guideline tables. Use the parenting time percentage from this calculator as one input into a dedicated child support calculator rather than a stand-in for the full formula.