Parenting Nights Per Year Calculator
Turn a weekly or fortnightly parenting schedule into total nights and percentage of care per year with this free custody calculator in your browser.
Your weekly care pattern
Pick the year, then turn on each day of the week the child is in your care. We count those days across the whole year.
Days in your care
Results
Choose a year and your care days, then press Calculate.
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Pick the year.
- Toggle each day of the week the child stays with you to “Yes”.
- Press Calculate for your nights per year, care percentage and the other parent's share.
How it works
For a fixed weekly routine, your nights for the year are simply how many times your chosen weekdays fall in that year. The calculator counts every one from 1 January to 31 December, then divides by the days in the year for your percentage.
Worked example
Friday and Saturday nights in 2026. Each occurs 52 times, so 104 nights ÷ 365 ≈ 28.5% — regular care.
Frequently asked questions
Is this a legal determination of care?
No — it's an arithmetic estimate of nights for a fixed weekly pattern. Care arrangements and any child-support effect are decided by agreement, a court or the relevant agency.
How are holidays or changeovers handled?
This counts a fixed weekly routine only. For one-off holidays or alternating weeks, adjust the count manually or use a detailed care-pattern tool.
Related tools
- Care Percentage Calculator
- Nights in Care Calculator
- Child Support Estimator (Australia)
- Custody Nights Percentage Calculator
- Pocket Money Savings Calculator
- Conception Date Calculator
Explore more in Family, Parenting & Custody.
Cite this tool
Zerdly. (2026). Parenting Nights Per Year Calculator. Retrieved from https://www.zerdly.com/tools/parenting-nights-per-year-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.