Grocery Cost per Person Calculator
Split a grocery receipt by household size to see cost per person and monthly food budget.
Compares to USDA thrifty, low-cost, moderate, and liberal food plans.
Knowing your grocery cost per person per week is the foundation of any realistic household budget. It gives you a benchmark to measure against, reveals whether you’re over-spending, and helps you plan for changes — a new baby, a college student moving out, or hosting guests.
Formula: Cost Per Person Per Week = Total Weekly Grocery Spend ÷ Number of People
Monthly equivalent: Monthly per Person = Cost Per Person Per Week × 4.33 (average weeks per month)
What each variable means:
- Total Weekly Grocery Spend — include all grocery store purchases: food, beverages, toiletries, cleaning supplies. Exclude restaurant meals and takeout — those belong in a separate “dining out” budget line.
- Number of People — use whole-person equivalents. Children under 5 eat about half as much as adults; teens often eat as much as adults or more.
Worked example: A family of 4 (2 adults, 2 children age 8 and 12) spends $480/month on groceries.
Weekly spend = $480 ÷ 4.33 = $110.86/week Per person per week = $110.86 ÷ 4 = $27.71/person/week
USDA monthly food plan benchmarks (2024, per person):
- Thrifty plan: $200–$270/month
- Low-cost plan: $260–$340/month
- Moderate plan: $320–$420/month
- Liberal plan: $420–$550/month
Ways to reduce cost per person:
- Meal planning before shopping (reduces impulse buys by 20–30%)
- Buying staples in bulk (rice, beans, pasta, canned goods)
- Using a store loyalty card and checking weekly specials
- Reducing food waste — the average household wastes 30–40% of food purchased