Grocery Budget

The defaults are pulled directly from the USDA's own published Food Plans (Cost of Food at Home, U.S. Average, December 2025) — the Moderate-Cost average for adults 19-50 and the Low-Cost average for school-age children 6-11 — but actual costs still vary by region, local grocery prices, and shopping habits (discount stores versus specialty grocers, for example). For the most accurate estimate, replace the defaults with your own recent grocery receipt totals divided by the number of weeks and people they covered.

Use a multiplier above 1.0 (for example 1.2-1.4) if your household regularly buys organic produce, premium proteins, or specialty dietary items that cost noticeably more than conventional groceries, and a multiplier below 1.0 (for example 0.8-0.9) if your household relies mainly on budget staples, store brands, and bulk purchasing. A multiplier of exactly 1.0 assumes a fairly typical, middle-of-the-road grocery basket.

A calendar month averages about 4.33 weeks (52 weeks divided by 12 months), not an even 4, so multiplying a weekly figure by 4 systematically understates true monthly spending by roughly 8%. Using 4.33 keeps the monthly and annual figures consistent with each other, since 4.33 weeks times 12 months equals the same 52 weeks used for the annual estimate.

USDA's own Food Plan data is calibrated to individuals in a 4-person household, and its published footnote directs an adjustment for every other size: +20% for a 1-person household, +10% for 2-person, +5% for 3-person, no change at 4-person, -5% for 5- or 6-person, and -10% for 7-or-more-person households (based on total Adults plus Children). Smaller households pay more per person because fixed waste and bulk-buying leverage don't scale down linearly, so this calculator applies that adjustment automatically rather than leaving you to do the math by hand.

Not by individual age — it applies one flat per-adult rate to every adult and one flat per-child rate to every child, so it won't distinguish between a toddler and a teenager, or between an adult who eats out often and one who cooks every meal at home. It does automatically apply the USDA's household-size adjustment based on your total headcount, but for a household with unusually varied eating patterns within those two groups, consider running the calculator with adjusted per-person rates that better reflect your specific mix.