Parenting Time Calculator
Parenting time calculator works out Parent A overnights and Parent B overnights from Rotation, Your own pattern and First night of the cycle. The default figures on this page give parent A share of 50.00 %; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Rotation: 2-2-3 rotation, written as AABBAAABBAABBB from 2026-01-05 (a Monday).
- Within one 14-night cycle the split is 7 to 7.
- 2026-01-05 to 2027-01-04 spans 364 days, which is 364 overnights - the night beginning on the end date is not counted.
- Counting each night against the pattern gives 182 for parent A and 182 for parent B, or 50% / 50%.
Its 4 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the parenting time calculator calculates
Counts each parent’s overnights over a period under a repeating custody rotation - week on/week off, 2-2-3, 2-2-5-5, 3-4-4-3, every other weekend, or a pattern you write out - and reports the split as a percentage and as overnights a year. Overnights are the unit because child-support guidelines are written in overnights, not hours, and a period from the 1st to the 8th contains seven of them.
How to use this parenting time calculator
Enter Rotation, Your own pattern, First night of the cycle and Count from. Parent A overnights updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Parent A overnights, Parent B overnights and Overnights in the period.
The method follows US Office of Child Support Services, "Child Support and Parenting Time" and state guideline reviews and Arizona Supreme Court, Parenting Time Guidelines (worked examples of the standard rotations).
A 2-2-3 fortnight is an even split example
With Rotation: 2-2-3, First night of the cycle: 2026-01-05, Count from: 2026-01-05, Count to: 2026-01-19, the calculator returns Parent A overnights: 7, Parent B overnights: 7, Overnights in the period: 14. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Parent A overnights, Parent B overnights and Overnights in the period. The inputs you can vary are Rotation, Your own pattern, First night of the cycle, Count from and Count to.
Understanding Parent A overnights, Parent B overnights and Overnights in the period
This counts a schedule; it does not apply any state’s support formula or account for holidays and vacation time, which most parenting plans allocate separately.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
What are the 2026 parenting time guidelines in Indiana?
On the figures this page opens with, the parent A share is 50%. No single number fits everyone: it follows Rotation, Your own pattern and First night of the cycle, so enter your own above and the answer updates as you type.
What information do I need for the parenting time calculator?
You need Rotation, Your own pattern, First night of the cycle, Count from and Count to. The page opens with default figures that give parent A share of 50.00 %, so you can see the scale before entering your own.
What does this parenting time calculator show?
It shows Parent A overnights, Parent B overnights, Overnights in the period, Parent A share, Parent B share, Parent A overnights a year, Parent B overnights a year and Length of the cycle, with the working and any warnings for your entries.
Can I check how the parenting time calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.