Enter the total number of adults and children in the household to estimate your monthly groceries cost.

Average Groceries Cost Per Month Calculator

Enter any 2 values to calculate the missing variable

Note: This calculator uses a simple rule-of-thumb estimate of $345 per adult and $135 per child per month (USD). Actual grocery costs vary by location, diet, and prices.

Average Groceries Cost Per Month Formula

The following equation is used by this calculator to estimate monthly groceries cost using fixed per-person amounts.

FC = A*345 + C*135
  • Where FC is the estimated groceries cost per month (USD)
  • A is the number of adults in the household
  • C is the number of children in the household
  • 345 is the assumed monthly cost per adult (USD per adult per month)
  • 135 is the assumed monthly cost per child (USD per child per month)

What is the Average Groceries Cost Per Month?

Definition:

Average monthly groceries (food-at-home) spending varies widely based on household size, location, prices, and diet. The USDA publishes monthly “Food Plans” (Thrifty, Low-Cost, Moderate-Cost, and Liberal) that estimate the cost of a nutritious market basket by age and sex, which many people use as a budgeting benchmark.

For broader context, USDA Economic Research Service data show that, in recent years, U.S. consumers have spent roughly around 5% of disposable personal income on food at home (groceries). (Total food spending, including restaurants, is typically closer to about 10%.)

As an illustration, if a household earns around $80,000 per year, spending about 5% on groceries would be approximately $333 per month (0.05 × 80,000 ÷ 12). Actual spending can be meaningfully higher or lower depending on circumstances, and “income” measures differ from “disposable personal income,” so this should be treated as a rough comparison rather than a precise estimate.

The USDA’s Food Plan estimates vary by age and sex because calorie needs and typical food patterns differ across life stages. Teenagers and many young adults often have higher estimated food costs than younger children and many older adults largely due to higher energy needs.

FAQ

How does the number of people in a household affect the average groceries cost per month?
In general, grocery costs rise as you add more people to the household. This calculator estimates that change using fixed per-person amounts ($345 per adult and $135 per child). In real life, the cost per person can be lower in larger households due to shared staples and bulk purchasing, or higher due to dietary preferences, allergies, and local prices.

Why do grocery expenses vary between different age groups?
Grocery expenses can vary by age because calorie needs and eating patterns change (for example, many teens and young adults need more calories than younger children or some older adults). Costs also differ based on diet quality, special dietary needs, and whether someone eats more meals at home versus away from home.

How does the USDA calculate the average groceries cost, and why is it important?
The USDA publishes monthly “Food Plans” that price a standardized market basket of foods intended to represent a nutritious diet at different cost levels (Thrifty through Liberal) and for different age/sex groups. These estimates are useful as a budgeting benchmark and are also used in policy contexts (for example, the Thrifty Food Plan is used in setting SNAP benefit levels).