Custody Time Calculator

Calculate parenting time percentages for custody schedules.

Parent A

14.25% (52.00 nights)

Parent B

85.75% (313.00 nights)

Custody Breakdown

Parent A Overnights52 nights
Parent B Overnights313 nights
Parent A Percentage14.25%

Use the Custody Time Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Our Custody Time Calculator helps divorced or separated parents accurately determine parenting time percentages for various custody schedules. This tool is crucial for understanding each parent's share of overnight stays, which is often a key factor in child support calculations and legal agreements, especially in 2026.

The calculator operates by tallying the number of overnights each parent has with the child(ren) within a specified period (e.g., a year). It then divides each parent's total overnights by the total number of overnights in that period (365 days in 2026 for a standard year), expressing the result as a percentage.

Ensure you account for all holidays, school breaks, and special events. A common mistake is only counting regular weekly schedules and overlooking these significant deviations, which can dramatically alter the final percentages. Always double-check your input for accuracy.

Example: 50/50 Custody Schedule (Alternating Weeks)

  1. 1 Input: Parent A has the child for 26 weeks (182 overnights), Parent B has the child for 26 weeks (183 overnights) in 2026 (leap year).
  2. 2 Calculation: Parent A percentage = (182 / 366) * 100 = 49.73%. Parent B percentage = (183 / 366) * 100 = 50.27%.
  3. 3 Result: Parent A has 49.73% of parenting time, Parent B has 50.27% of parenting time.
  4. 4 Context: This slight difference is due to the odd number of days in a year (366 in 2026). This precise breakdown is valuable for child support calculations and ensuring compliance with court orders.

Source: U.S. Courts (uscourts.gov) · Last updated: April 2026

Frequently Asked Questions

What does 50/50 custody look like?
Common 50/50 schedules include alternating weeks, 2-2-3 rotation (two days with each parent then three with one, alternating), or 3-4-4-3 schedules. The best arrangement depends on the children's ages, school logistics, and parents' work schedules.
How is parenting time percentage calculated?
Count the number of overnights each parent has per year and divide by 365. For example, 182 overnights equals approximately 49.9% parenting time. This percentage often determines child support calculations in most states.
Does custody percentage affect child support?
Yes. In most states, the more time a parent spends with the child, the lower their child support obligation because they are directly providing for the child during that time. The threshold varies by state, typically around 30-40% parenting time.

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