Weekly Meal Plan Cost Calculator
Add up breakfast, lunch, dinner and snacks per person to get a real weekly, monthly and yearly food-plan cost for your whole household, with children, meals eaten out, pantry staples, food waste and sales tax, and see how it compares with the USDA Thrifty, Low-Cost, Moderate-Cost and Liberal food plans.
How it works
Per person per day = breakfast + lunch + dinner + snacks · Home food = per person per day × days × people (children count as a share of an adult) − meals out × average main-meal cost · Groceries = (home food + waste allowance + pantry staples) × (1 + sales tax) · Eating out = meals out × cost per meal × people · Weekly = groceries + eating out · Monthly = weekly × 52 ÷ 12 · Yearly = weekly × 52
Building a food budget from the meal up is far more accurate than guessing a weekly total, because each meal has a stable per-person cost you can actually observe. Multiplying by the days on the plan and by everyone in the household turns those per-meal figures into the number that hits your account; children can be counted at a share of an adult’s cost, 60% by default. If some meals are eaten out, they come off the home plan at the average cost of a main meal and are added back at the restaurant price, which shows how much eating out adds. Optional extras cover what meal-by-meal budgets usually miss: pantry staples that are not part of any one meal, food that is bought but thrown away, and sales tax where groceries are taxed. Converting to a monthly average uses 52 weeks ÷ 12 months rather than a flat ×4, which quietly undercounts by roughly a week of groceries a year. Finally, the calculator sets your grocery spending against the USDA’s four food plans for a household of your size, from the Thrifty plan used for SNAP benefits to the Liberal plan, using the latest monthly U.S. average prices.
Worked example
Breakfast $2, lunch $4, dinner $6 and $2 of snacks is $14 per person per day. For 2 people that is 14 × 2 × 7 = $196 a week, and 196 × 52 ÷ 12 ≈ $849 a month or $10,192 a year. The USDA plans for two adults aged 19–50 (with the 10% small-household adjustment) cost about $145 (Thrifty), $150 (Low-Cost), $186 (Moderate-Cost) and $232 (Liberal) a week, so this plan sits between Moderate-Cost and Liberal. If each person eats out twice a week at $15, those 4 meals replace $16 of home food and add $60, for $240 a week.
Sources: USDA Food Plans: Monthly Cost of Food Reports (August 2026) · USDA — Food waste FAQs
Frequently asked questions
Why multiply the weekly cost by 52 ÷ 12 instead of 4?
A month averages about 4.33 weeks, not 4. Using ×4 undercounts by roughly one extra week of groceries every three months, so the 52 ÷ 12 conversion gives a monthly figure that matches a full year of spending.
How do I handle meals eaten out?
Enter how many meals each person eats out in a week and what one costs. The calculator takes those meals off the home plan at your average breakfast, lunch and dinner cost and adds the restaurant price instead, then shows the eating-out share of the total.
Can I use this for meal-prep planning?
Yes. Estimate each prepped meal’s cost per serving and put it in the matching slot, and set the days a week (for example 5 for weekday lunches and dinners). The weekly total is the budget you need to buy that week of prepped food.
How much does a typical household spend on food?
The USDA prices four healthy home-cooked food plans each month. In August 2026 they ran from about $236 a week (Thrifty) to about $387 (Liberal) for a family of two adults and two school-age children. The calculator shows these plans for your own household size so you can see where your plan lands.
How should I count children?
Enter how many of the people are children under More options. Their food is counted at 60% of an adult’s by default; raise it for teenagers, who often eat as much as adults or more.
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This calculator is for educational purposes. Double-check important results before acting on them.