Calculate parenting time percentages across a custody schedule.
Overnights rather than hours are the standard measure because they capture responsibility for meals, bedtime and mornings. Support formulas frequently step at thresholds such as 35 or 40 per cent, so small changes can matter greatly. Because support can change sharply at a threshold, the difference between five and six overnights a fortnight can have financial consequences out of proportion to the time involved.
Parenting Time/Custody
Share of overnights = annual overnights ÷ 365, the usual basis for support calculations
This is a general illustrative estimate and is not legal advice. Laws, formulas and guidelines vary substantially by jurisdiction and change over time, and courts retain discretion. Consult a qualified lawyer in your jurisdiction before relying on any figure here.
Share of overnights = annual overnights ÷ 365, the usual basis for support calculations Overnights rather than hours are the standard measure because they capture responsibility for meals, bedtime and mornings. Support formulas frequently step at thresholds such as 35 or 40 per cent, so small changes can matter greatly.
Because support can change sharply at a threshold, the difference between five and six overnights a fortnight can have financial consequences out of proportion to the time involved.
This calculator takes 3 inputs: Overnights per fortnight with parent A, Additional holiday nights with parent A, Additional daytime hours with parent A. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.