Split a grocery bill between adults and children fairly.
Children generally eat a fraction of an adult portion, so the bill is split into adult-equivalent units rather than evenly by head. Dividing a child's weekly share across twenty-one meals gives the cost per meal. Knowing per-person and per-meal costs turns a vague grocery bill into a per-child number that reveals how much eating out or school meals can add.
Meal Cost per Child
Cost per adult = groceries / (adults + children x child share); per child = adult cost x child share
Cost per adult = groceries / (adults + children x child share); per child = adult cost x child share Children generally eat a fraction of an adult portion, so the bill is split into adult-equivalent units rather than evenly by head. Dividing a child's weekly share across twenty-one meals gives the cost per meal.
Knowing per-person and per-meal costs turns a vague grocery bill into a per-child number that reveals how much eating out or school meals can add.
This calculator takes 4 inputs: Weekly grocery cost, Number of adults, Number of children, Child share of an adult. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.