About ToolSite
Free, accurate parenting time calculations for parents, mediators, and family law attorneys — built on the overnight-based standard used by U.S. family courts.
Why This Calculator Exists
Calculating parenting time percentages by hand is tedious and error-prone. You need to account for regular overnights, holiday provisions, and summer weeks — then convert the total into a percentage that matches your state's child support worksheet format. Most parents get this wrong, sometimes by enough to affect support obligations by hundreds of dollars per month.
We built this calculator to give parents, attorneys, and mediators a fast, accurate, and free way to run these numbers. It uses the overnight-based percentage formula recommended by the American Bar Association and referenced in child support guidelines published by the National Conference of State Legislatures. No paywalls, no sign-ups, no ads tracking your searches.
The results match what you'd get from completing most state child support worksheets manually. We verify our calculations against published state guidelines and update the tool when guidelines change.
How We Approach Content
Every article on this site is written to answer real questions from parents navigating custody and parenting schedules. We cite sources — the ABA, NCSL, American Psychological Association, and state family court guidelines — and we flag where laws differ by state. We don't give legal advice; we give you the numbers and the context to have informed conversations with your attorney or mediator.
If you find an error in any calculation or article, please reach out. We take accuracy seriously and correct mistakes promptly.
Legal Standard Formula
Our calculator uses the overnight-based percentage formula that aligns with U.S. state child support guidelines — the same calculation attorneys and courts use.
No Paywalls
Every feature of this calculator is free. No account required, no premium tier, no time limits. Parents deserve access to accurate calculations without barriers.
Cited Sources
Every calculation methodology and article cites specific standards from the ABA, NCSL, APA, and state guidelines. You can verify everything we say.
Editorial Process
Calculator formulas are verified against published state guidelines before publication. Articles are reviewed for factual accuracy and updated when standards change.
Get in Touch
Found a calculation error, have a question about a schedule, or want to suggest an improvement?
contact@example.com