The calculation
Food cost percentage formulas
For one dish, divide the ingredient cost per serving by its menu price. For a whole period, first calculate the food inventory used, then divide that amount by food sales from the same period.
Menu itemIngredient cost ÷ Menu price × 100
Period food costBeginning inventory + Purchases − Ending inventory
Period percentageFood cost ÷ Food sales × 100
Formula references: Toast’s restaurant food-cost guide and the National Restaurant Association Educational Foundation’s restaurant-management materials.
Match the inputs
Menu-item cost versus period food cost
These two modes answer related but different questions. The menu-item mode shows how much of one item’s price goes to its ingredients. The period mode estimates what the restaurant actually used after accounting for the change in food inventory.
- Menu item: total the recipe quantities used for one serving at current ingredient prices.
- Whole period: value beginning and ending inventory consistently and use purchases received during the same period.
- Food sales: use the sales generated during those exact dates; separate drinks if their inventory is excluded.
Worked example
A $4.20 plate cost on a $14 menu price
Dividing $4.20 by $14 gives a 30% food cost. The item leaves $9.80, or a 70% gross margin, before labor, packaging, rent, utilities and other operating costs. At a 30% target food cost, the formula also returns a $14 target menu price.
Interpret the number
Food cost percentage is not total profitability
A lower food cost percentage leaves a larger share of each sale after ingredients, but it does not include the rest of the cost of running a restaurant. A higher-percentage item can also produce more gross-profit dollars than a cheaper item, so review both the percentage and the dollars left per sale.
Use the target field for your own operation. Menu mix, service model, labor needs and occupancy costs differ, so the calculator does not label one percentage as universally good or bad.
Avoid misleading results
Common food cost calculation mistakes
- Using purchases alone. Purchases do not show how much inventory remains unused at the end of the period.
- Mixing time periods. Monthly inventory usage divided by weekly sales produces a meaningless percentage.
- Mixing food and beverage figures. Include the same categories in both cost and sales.
- Treating gross profit as net profit. Labor, occupancy and other expenses still have to be paid.