The formula is simple; the definition may not be
The worksheet uses one transparent equation: counted overnights divided by the number of days in the year, multiplied by 100. For 120 overnights in a 365-day year, the arithmetic is 120 ÷ 365 × 100 = 32.88%. The other parent’s remaining count is 245 overnights, or 67.12%.
That result is mathematically correct for the numbers entered. It does not establish that a court, child-support agency, or parenting plan uses overnights as its measurement. Some processes use overnights; others may define days, hours, extended visits, or shared-care thresholds differently.
Build the count from a full-year calendar
A repeating two-week schedule is only the starting point. School breaks, summer schedules, holidays, birthdays, travel, make-up time, and one-time changes can shift the annual count. Mark each overnight on a real calendar, resolve double-counted or missing dates, and then enter the total.
Do not turn a schedule percentage into a legal conclusion
A parenting-time percentage does not decide legal custody, decision-making authority, the best interests of a child, or a child-support amount. Even when a support worksheet uses parenting time, it may also use both parents’ incomes, health insurance, childcare, other dependants, deviations, and state-specific tables.
Normal years and leap years
A normal calendar year has 365 days and a leap year has 366. For broad schedule planning, the difference is small. For a form tied to a particular year, use the actual number of days and follow its rounding instruction. This page displays two decimal places but retains the underlying fraction for the complementary result.
Keep a copy of the calendar behind the percentage
The percentage is easier to review when the underlying calendar is available. Save the schedule, note actual deviations separately, and identify whether the total describes a proposed plan or what actually occurred. Those are different facts and should not be presented interchangeably.
Privacy
The page needs only an overnight count and year length. Do not enter children’s names, addresses, case numbers, or other identifying information. The calculation runs in the browser and is not sent to a LegalCalc calculation endpoint.