Per person, per month
$266.67
Per person, per week
$61.54
Per person, per month
$266.67
Quick answer: To calculate grocery cost per person, divide your total grocery spend by the number of people it feeds: a household spending $800 a month for 3 people costs about $267 per person per month. For context, the USDA moderate plan costs about $337 to $399 a month per adult inside a family, and roughly $405 to $478 a month for an adult living alone, since one-person households carry a 20 percent upward adjustment (July 2026 report) - the Grocery Cost Per Person Calculator shows where your household lands.
Evergreen method
Build a budget from your own baseline
Use observed household spending and an explicit adjustment instead of treating a national average as a personal target.
Formula
monthly budget = weekly baseline × 52 ÷ 12Reproducible steps
- 1.Average at least four normal shopping weeks.
- 2.Separate groceries from restaurants and household supplies.
- 3.Apply one realistic adjustment, then review the result against actual receipts.
Data note — Evergreen model: The formula works with your own inputs and does not depend on a specific price or year.
FAQ
Questions, answered
How much should one person spend on groceries a month?
Roughly $305 to $585 a month. On the USDA July 2026 report, one adult living alone costs about $305 to $383 a month on the Thrifty plan and about $405 to $478 on the moderate plan, after the 20 percent one-person household adjustment.
What is the average grocery cost per person per week?
About $59 to $80 a week per person for the USDA reference family of four (Thrifty to moderate plan, July 2026 report), though this varies by diet, region, age, and household size.
How do I calculate my grocery cost per person?
Divide your total grocery spend by the number of people it feeds. A household spending $800 a month for 3 people costs about $267 per person per month.
Related
Keep going
Grocery Budget Calculator
Estimate a weekly and monthly grocery planning budget from household size, income, and a broad cost-of-living adjustment. Free, instant, and no sign-up.
Weekly Grocery Budget Calculator
Set a realistic weekly grocery budget for your household in seconds, with a per-person weekly breakdown based on thrifty-to-moderate USDA benchmarks.
Monthly Grocery Budget Calculator
Turn your weekly grocery spend into an accurate monthly grocery budget and yearly total, using true 4.33 weeks-per-month math instead of a rough guess.
Family Grocery Budget Calculator
Build a dated grocery planning estimate from transparent household profiles and USDA-derived reference rates; use the USDA tool for exact age and sex rows.
How Much Should You Spend on Groceries a Month?
Read guideAverage Grocery Bill by Household Size (1 to 5 People)
Read guideGrocery Budget for a Family of 4
Read guide