Grocery Budget Calculator

This builds a grocery budget from one figure you already have, which is what a week of food costs for one adult in your house. Enter that, say how many adults, teenagers, children and under fours you are feeding, and it returns the weekly, monthly and yearly budget along with the cost per person per day. The share each age group eats relative to an adult is a rule of thumb, and every one of those shares is a box you can change. A second mode works the other way round, taking a few weeks of receipts and showing what you actually spend against your income and your target. No national average or published food plan is used anywhere here, so the answer is only ever as good as the figure you start from.

Calculator Type

Start from what a week of food costs one adult in your house, then say who else you are feeding.

Adults (19 and over) *

Teenagers (12 to 18)

Children (4 to 11)

Under Four

Weekly Groceries per Adult ($) *

Your own figure. Take a few recent receipts, divide by the adults they fed, and use that.

A Teenager Eats This Share of an Adult (%)

A rule of thumb you can change. Teenagers often eat more than the adults do.

A Child Eats This Share of an Adult (%)

An Under Four Eats This Share of an Adult (%)

Formula and nappies are not food and are better entered as household items below.

Household Items, per Month ($)

Cleaning, paper goods, pet food, toiletries, whatever else lands on the grocery bill. Leave at zero for food only.

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