Grocery Cost per Person Calculator

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