Hong Life CalculatorsUnderstanding the food cost percentage calculator — concept and principle
Food cost percentage is the share of a dish's selling price that is spent on its ingredients. Restaurant owners, chefs and caterers use it to set menu prices, to check whether an existing price still works after supplier prices change, and to compare dishes on the same menu.
How it is calculated
- Price for target = plate cost ÷ (target food cost % ÷ 100).
- Current food cost % = plate cost ÷ current menu price × 100.
- Gross profit per plate = current menu price − plate cost.
Plate cost is the cost of every ingredient that goes onto one portion, including garnish, sauce and cooking oil, measured in the same currency as the price.
The principle
Food cost % is a simple ratio of cost to revenue. If you decide that ingredients should take 30% of every sale, the remaining 70% is left to pay for labour, rent, utilities and profit. Rearranging cost ÷ price = target gives price = cost ÷ target, so a lower target percentage means a higher price for the same plate. The gross profit per plate (often called contribution margin) shows the money each sale actually contributes; a dish with a higher food cost % can still bring in more money per plate if its price is high.
Worked example
- Inputs: plate cost $3.20, target 30%, current price $12.
- Price for target = 3.20 ÷ 0.30 = $10.67.
- Current food cost % = 3.20 ÷ 12 × 100 = 26.67%.
- Gross profit per plate = 12 − 3.20 = $8.80.
- The current price is already above the target price, so the dish meets the 30% goal with some room.
| Target food cost (%) | Price for target |
|---|---|
| 7.5 | $42.67 |
| 15 | $21.33 |
| 22.5 | $14.22 |
| 30 | $10.67 |
| 37.5 | $8.53 |
| 45 | $7.11 |
| 60 | $5.33 |
How to read the result
Targets of roughly 25–35% are often quoted for full-service restaurants, but the right figure depends on the concept: dishes that need a lot of labour usually need a lower food cost %, while items with little preparation can carry a higher one. If the current percentage is above your target, you can raise the price, reduce the portion, or change the recipe. Round the target price to a sensible menu price rather than printing $10.67.
Common mistakes
- Using the purchase price of ingredients without allowing for trimming, bones and cooking loss (yield).
- Leaving out small items such as oil, butter, garnish and bread.
- Confusing markup with margin: a 30% food cost is a markup of about 233% on cost, not 30%.
- Comparing a price that includes sales tax or VAT with a cost that does not.
Frequently asked questions
What is a good food cost percentage?
There is no single right number. Many operators aim for the high 20s to low 30s, and check the actual figure monthly from inventory and sales.
How do I calculate food cost for a whole month?
Use (opening inventory + purchases − closing inventory) ÷ food sales × 100 for the same period.
What is the difference between food cost % and gross profit?
The percentage is a ratio, gross profit is an amount of money per plate. Both are useful: one controls efficiency, the other shows earnings.
Sources: Jack E. Miller, David K. Hayes, Lea R. Dopson, Food and Beverage Cost Control, John Wiley & Sons