Free tools for co-parents

Calculators, planners, and templates for shared custody. No sign-up, no paywall, nothing leaves your browser — free to use and free to cite.

Calculators

Get the exact overnight percentage and days per year for any custody schedule — or build your own 14-day pattern.

Estimate a monthly child support figure from both incomes, number of children, and the overnight split. Educational estimate only.

Compare a 50/50 split against an income-proportional (pro-rata) split across every shared child expense.

Pick a schedule (2-2-3, 2-2-5-5, week-on/off…), a start date, and get a printable 12-month calendar in seconds.

Choose holidays and a rotation style, then get a printable three-year holiday grid both parents can agree to.

Printable and CSV templates: parenting plan, expense log, communication log, holiday worksheet, handoff sheet.

All 50 states and DC compared: the term each state uses for a parenting schedule, parent-education requirements, and where to file.

Looking for guides rather than tools? Browse the resource library, every custody schedule explained, or the custody glossary.