Child Custody Days Calculator

Work out child custody days instantly with clear inputs, formula shown and shareable results.

About Child Custody Days Calculator

Care arrangements are usually counted in overnight stays, because nights rather than daytime contact drive both the practical routine and, in many jurisdictions, child maintenance bands. Routine nights across term time plus allocated holiday nights give the annual total.

Formulas

Routine nights

Routine = Nights per fortnight x (Weeks in the routine / 2)

Annual total

Total nights = Routine nights + Holiday nights

Worked example

With the default values below, Child Custody Days Calculator returns Nights per year with this parent of 136. Change any input above and every figure here is recalculated in your browser.

Inputs used

Nights with this parent per fortnight: 5
Additional holiday nights per year: 21
Weeks covered by the routine: 46

Results

Nights per year with this parent: 136
Share of the year: 37.26%
Nights from the term-time routine: 115
Nights with the other parent: 229

Step by step

1Values used
2Routine nights
3Annual total
4Nights per year with this parent= 136
5Share of the year= 37.26
6Nights from the term-time routine= 115
7Nights with the other parent= 229

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or fees or charges into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Indicative estimate only. Fees, entitlements, limits and formulas vary by jurisdiction, statute, policy wording and the facts of the case. This is not legal, tax, insurance or financial advice — confirm with a qualified professional or the relevant authority.

Frequently Asked Questions

Why are nights counted rather than hours?

Because overnight care is objectively verifiable and is the metric most maintenance formulas and court orders use.

Does a 50/50 split affect maintenance?

In many systems shared care reduces or eliminates the maintenance liability once nights pass a threshold. The thresholds vary considerably.