Food Cost Formula: How to Calculate Food Cost % and Price Every Menu Item

The food cost formula is: food cost % = cost of goods sold ÷ food sales × 100. For one dish, divide the plate cost by the menu price. To set a price, divide the plate cost by your target food cost %. A $3.80 plate at a 30% target sells for about $12.67. This guide shows every formula with worked numbers and a copyable costing template.

Most restaurant owners know their food cost matters. Fewer can say which of their 40 dishes loses money. The steps below fix that. You need a spreadsheet, a scale, and your last few supplier invoices.

1. Calculate Plate Cost for Every Dish

Plate cost (also called recipe cost or portion cost) is what the ingredients of one serving cost you. Count everything on the plate, including sauces, garnish, oil, and the side. Skipping the small items is the most common reason a dish looks more profitable than it is.

Plate cost formula: plate cost = sum of (quantity used × cost per unit) for every ingredient.

Here is a worked example for a chicken burger with fries:

To get cost per ounce, divide the price per pound by 16. The cheddar is $6.40 ÷ 16 = $0.40 per oz, so 0.75 oz costs $0.30. The fries are $1.60 ÷ 16 = $0.10 per oz, so 5 oz costs $0.50.

Adjust for yield (trim and cooking loss)

You pay for the product as purchased (AP). You serve the edible portion (EP). If you lose 20% to trim, your usable cost is higher than the invoice price.

Yield formula: usable cost per lb = purchase price per lb ÷ yield %.

Example: beef tenderloin costs $18.00 per lb and trims to an 80% yield. Usable cost is $18.00 ÷ 0.80 = $22.50 per lb. A 6 oz portion is 0.375 lb × $22.50 = $8.44. Without the yield adjustment you would write $6.75 and underprice the dish by $1.69.

2. Calculate Food Cost % for Each Menu Item

Item food cost % shows what share of the menu price goes to ingredients.

Formula: item food cost % = plate cost ÷ menu price × 100.

The chicken burger costs $3.80 to make and sells for $13.00. That gives $3.80 ÷ $13.00 × 100 = 29.2%. The gross profit is $13.00 - $3.80 = $9.20 per burger.

Run this for every item and sort the list from highest to lowest. The top of the list needs attention first.

3. Set the Price From a Target Food Cost %

This is the core of menu pricing. Pick a target food cost % for the dish, then work backward.

Formula: menu price = plate cost ÷ target food cost %.

The same $3.80 burger at different targets:

A shortcut is the multiplier. Divide 1 by your target: 1 ÷ 0.30 = 3.33. Multiply the plate cost by 3.33 to get the price. A 4x multiplier equals a 25% target.

Why the formula is a starting point, not the answer

• Market price. If the burger place down the street charges $11, a $12.95 price needs a reason: bigger portion, better bun, a photo that sells it.
• Different targets per category. Pasta and pizza usually carry lower food cost % than steak. Pricing every dish at one flat percentage can make the premium items too expensive and leave margin on the table elsewhere.
• Psychological price points. Round to prices that feel natural in your market ($12.95, $13, or $12.50), then recheck the real percentage.

Use a menu pricing calculator or spreadsheet for the arithmetic, but make the final call yourself. The formula does not know your neighborhood.

4. Calculate Period Food Cost From Inventory

Item costs are theoretical. Period food cost tells you what you actually spent. Run it weekly or monthly, using the same inventory dates every time.

Formula:

• Cost of goods sold (COGS) = beginning inventory + purchases - ending inventory
• Food cost % = COGS ÷ food sales × 100

Worked example for one month:

Compare actual with theoretical (ideal) food cost

Theoretical food cost uses your plate costs and your sales mix. Multiply units sold by plate cost for every item, add them up, and divide by food sales. Suppose this gives $21,240.

• Theoretical food cost = $21,240 ÷ $72,000 = 29.5%
• Actual food cost = 31.9%
• Gap = 2.4 percentage points, or $1,760 of food that left the building without being sold

That gap is waste, over-portioning, theft, spoilage, comps, or recipe costs that are out of date. Toast explains that actual cost will always run above theoretical, because theory assumes no breakage or shrinkage. A small gap is normal. A growing gap is a signal to investigate.

5. Compare With Benchmarks, Including Prime Cost

Benchmarks help you check your numbers. They do not replace your own costs and concept.

The same UpMenu page says: "No single number is ideal, but industry medians are a useful reality check." A steakhouse, a taqueria, and a pizzeria will land in different places. Compare against your own history first.

Prime cost: the number that includes labor

Food cost alone hides a trap. You can cut food cost by buying cheaper product and then pay for it in prep labor or lower quality. Prime cost combines both.

Formula: prime cost = cost of goods sold + total labor cost. Prime cost % = prime cost ÷ total sales × 100.

Example: a month with $80,000 in net sales, $25,400 in COGS (food and beverage), and $22,600 in labor (wages, taxes, benefits). Prime cost is $48,000. Prime cost % is $48,000 ÷ $80,000 = 60.0%. That sits at the low end of the full-service range above.

6. Use Menu Engineering to Rank Your Dishes

Food cost % tells you how much of the price is ingredients. It does not tell you how many dollars the dish earns. Menu engineering adds popularity to the picture. The framework was developed by Michael Kasavana and Donald Smith at Michigan State University in the 1980s. It sorts each dish by units sold and by contribution margin (menu price minus plate cost, in dollars). Dishes that sell well with a high margin are Stars. Dishes that sell well with a low margin are Plowhorses. Dishes with a high margin that sell little are Puzzles. Dishes weak on both are Dogs.

Use this only as a ranking aid. A dish with a high food cost % can still earn the most dollars, so do not cut a dish on food cost % alone. Test one change at a time and watch the next month's sales mix.

7. Copy the Recipe Costing Template

Paste this table into a spreadsheet. Make one sheet per dish. Fill in purchase data and quantity, and let the formulas do the rest.

Spreadsheet formulas, assuming purchase price in column C and yield in column D:

• Usable cost per unit: =C2/D2 (enter yield as 0.80)
• Line cost: =E2*F2
• Plate cost: =SUM(G2:G10)
• Calculated price: =PlateCost/TargetPct
• Actual food cost %: =PlateCost/MenuPrice

Keep an "invoice date" column on the sheet. Costs are only as good as the last invoice you checked.

8. Update Prices When Ingredient Costs Move

Costing is not a one-time job. Ingredient prices change, and a stale menu quietly eats margin.

Example: chicken thigh rises 10%, from $4.80 to $5.28 per lb. The chicken line goes from $1.80 to $1.98 and plate cost from $3.80 to $3.98. At the $12.95 price, food cost % moves from 29.3% to $3.98 ÷ $12.95 = 30.7%. To get back near 29.3%, the price would need to be about $13.56. Rounded to $13.50, the item sits at 29.5%.

A simple routine

1. Weekly: update prices for your 10 highest-cost ingredients (proteins, dairy, oil, produce that swings).
2. Monthly: recalculate plate costs and re-rank dishes by contribution margin and units sold.
3. Quarterly: decide on price changes. Change a few items at a time and favor Stars and Puzzles, where guests are less price-sensitive than on a Plowhorse everyone orders.
4. Any big swing: reprice the affected dishes now, not at the next reprint.

The bottleneck is often the menu itself. A printed or PDF menu can take days to update, so prices stay wrong for weeks. An editable QR menu removes that delay: you change the price in a dashboard and guests see it the moment they scan. See also what traditional paper menus cost and how much reprinting adds up to over a year.

Bottom line: cost every plate, price from a target, check the result against real inventory, and rank dishes by dollars of margin. Then keep the numbers fresh. Exact figures in this guide are examples; use your own invoices and sales data.