Family Grocery Budget Calculator

What should a family grocery budget be?

Groceries are the budget line families argue about most, because nobody knows what "normal" is. The USDA has quietly answered that question for decades: it publishes monthly food plans at four spending levels, from thrifty to liberal, based on what it actually costs to feed people of different ages a nutritious diet at home. Adjusted to 2026 prices, a typical family of four lands around $1,638 a month on the moderate plan, roughly $378 a week.

Your own number moves with three things: how many people you feed, how old the kids are, and how you shop. The calculator above adjusts for all three, using the same relationships the USDA found, so you get a realistic target rather than a guilt trip.

How the family grocery budget calculator works

1. Pick a spending style. The four USDA plans, adjusted to 2026 dollars, cost roughly $290, $370, $460, and $560 per adult per month. Thrifty assumes disciplined lists, store brands, and minimal waste; liberal assumes convenience items and premium picks.
2. Count the adults. Each adult adds a full share at your chosen tier.
3. Count the children and set their average age. Kids eat less than adults, until they don't. Under 6, a child costs about 62 percent of an adult; 6 to 11, about 78 percent; teenagers about 95 percent.
4. Economies of scale. Bigger households waste less and buy bigger packages, so we scale the total: singles pay about 20 percent more per person, couples 10 percent more, and households of five or more save 5 to 10 percent.

The result is groceries only, all meals prepared at home. Restaurants, takeout, and coffee runs are a separate line, and for many families a surprisingly large one.

A worked example

Take the defaults: two adults and two children with an average age of 8, on the moderate plan. The adults cost 2 times $460, or $920 a month. The kids cost 2 times $460 times the 78 percent school-age factor, about $718. A four-person household gets no size adjustment, so the total is $1,638 a month, which is $378 a week or roughly $19,650 a year.

Now tap thrifty. The same family drops to about $1,032 a month, saving over $600 monthly, more than $7,200 a year, mostly through store brands, planned menus, and cutting waste. Slide the children's average age up to 15 instead, back on moderate, and the total climbs to about $1,795: two teenagers eat nearly as much as two more adults. Neither number is right or wrong; the point is to pick a tier deliberately instead of discovering it at the register.

Five ways to move your number down a tier

• Plan the week before you shop. A menu plus a list is the single biggest difference between thrifty and moderate spending.
• Let store brands win. Pantry staples, dairy, and frozen vegetables are commodity products; the label premium is mostly marketing.
• Cook once, eat twice. Doubling recipes turns tonight's dinner into tomorrow's lunch and beats any coupon.
• Audit the waste. American families throw out roughly a quarter of the food they buy. Shrinking that gap is invisible savings.
• Watch unit prices on kid staples. Snacks, cereal, and juice have wild per-ounce swings between package sizes and brands.

Assumptions and methodology

• Default values. The tool loads with the moderate plan, two adults, two children, and an average child age of 8, producing the default target of $1,638 a month. Change any control to personalize it.
• Per-adult tier costs reflect USDA food plan levels adjusted to 2026 dollars using published food-at-home inflation.
• Child factors (62, 78, and 95 percent of an adult by age band) and household-size adjustments follow the relationships in USDA food plan tables.
• A month is treated as 4.33 weeks for the weekly figure.
• The target covers food prepared at home only, and assumes no special diets, which can move costs meaningfully.
• Currency display. The "Show results in" menu only changes the currency symbol and number formatting shown; it does not convert any figure. Defaults are US averages regardless of the currency selected.

Frequently asked questions