Family, Parenting & Custody Calculators

Care percentage, nights in care and shared-care tools.

10 tools · 100% Free · Works Offline

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Popular Calculators

Pregnancy Due Date CalculatorEstimate your baby's due date and current week of pregnancy from your last period or conception…

Ovulation CalculatorPredict your ovulation day and most fertile window based on your cycle length with this free…

Conception Date CalculatorEstimate your likely conception date from a due date or last period using this free conception…

Period CalculatorPredict your next period, cycle length and fertile days with this free period calculator that…

All Family, Parenting & Custody Calculators (10)

Guide to Family Calculators

This hub pulls together two jobs separated parents and expecting families keep running into: working out how care time is split across a year, and tracking the reproductive-health dates around pregnancy. The care-time side is where picking the right tool matters most, because "percentage of care" and "child support" both depend on how you count overnights versus days, and small differences in how a fortnight or holiday block is tallied can shift which care bracket you land in.

Working out the care split

Start with nights or custody-nights percentage if you already know the overnight pattern; use the care percentage tool when you want the figure expressed the way care assessments describe it, and the nights-per-year tool to convert a repeating roster into an annual total.

Care Percentage Calculator Nights in Care Calculator Custody Nights Percentage Calculator Parenting Nights Per Year Calculator

Estimating child support and family money

Once you have a care percentage, the child support estimator gives a rough Australian figure for planning; the pocket money tool is a simpler household job for showing kids how savings add up over time.

Child Support Estimator (Australia)Care Percentage Calculator Pocket Money Savings Calculator

Pregnancy and cycle dates

Use the due date or conception tools once a pregnancy is confirmed, and the ovulation or period tools when you are still tracking a cycle to plan or predict timing.

Pregnancy Due Date Calculator Conception Date Calculator Ovulation Calculator Period Calculator

Important calculation notice

These calculators are intended for education, estimation and preliminary checks. Verify all inputs, units, assumptions, material properties and applicable standards. Safety-critical or final engineering designs should be checked by a suitably qualified professional.

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