How to Calculate Food Cost Percentage for a Restaurant

Food cost percentage is the cost of the food you used divided by the food you sold, multiplied by 100. That is the whole formula. The part that trips people up is working out "the food you used", and doing it at two different levels: the whole restaurant for a period, and a single plate.

This guide covers both, with worked numbers, then shows the mistakes that make the percentage lie to you. All dollar figures below are illustrative examples, not industry benchmarks.

The formula in one line

Food cost % = (cost of food used ÷ food sales) × 100

If you spent $3.50 in ingredients on a plate that sells for $16.00, the plate runs at 21.9%. If your restaurant used $29,500 of food in a period and sold $98,000 of food, the restaurant runs at 30.1%.

The two numbers answer different questions. The plate number tells you whether a dish is priced right. The restaurant number tells you what actually happened in the walk-in, including waste, theft, over-portioning and mistakes.

Step 1: Calculate food cost for the whole restaurant

You cannot use purchases alone. Whatever you bought but did not use is still sitting on your shelves, and whatever you used might have been bought last period. The standard approach adjusts for inventory:

Food used = beginning inventory + purchases − ending inventory

Illustrative example for one four-week period:

Three practical notes:

• Use food sales only, not total sales including alcohol, unless you are deliberately calculating a blended figure.
• Use pre-tax sales. Sales tax is not revenue.
• Your inventory valuation is only as good as your counts and your prices. A sloppy count produces a confident wrong answer.

Step 2: Calculate the cost of a single plate

List every ingredient on the plate, cost it at the price you actually pay, and add it up. Illustrative pan-roasted chicken plate:

At a menu price of $16.00, the food cost is $3.50 ÷ $16.00 = 21.9%, and gross profit per plate before labour and overheads is $12.50.

Account for yield and trim

The price on the invoice is for the product as purchased, not as served. If carrots cost $1.60/kg and you lose 15% to peeling and trimming, you pay $1.60 ÷ 0.85 = $1.88 per usable kilogram. Skip this step and every plate containing trimmed produce, butchered meat or whole fish is costed too low.

The same logic applies to cooked yield: a kilogram of dried beans or raw rice is not the same as a kilogram on the plate.

Step 3: Compare theoretical and actual

Your plate costs, multiplied by what you sold, give a theoretical food cost: what it should have been if every plate was made to recipe with no waste. Your inventory-based figure is the actual. The gap between them is where the problems hide.

If theoretical is 28% and actual is 31%, you have a three-point gap. On $98,000 of food sales that is about $2,940 for the period. It might be waste, over-portioning, unrecorded staff meals, receiving errors, supplier price changes not yet reflected in your recipe costs, or counting mistakes. The point is that you now know to look, and roughly how much it is worth.

What is a "good" food cost percentage?

There is no single answer. A widely quoted rule of thumb is 30% to 35%. Toast, citing National Restaurant Association 2024 data, reports median food and non-alcoholic beverage cost of about 32% for both full-service and limited-service restaurants. Other vendors publish concept-by-concept ranges, but those are usually target ranges, not measured averages.

Use benchmarks as a sanity check and then compare yourself to your own history and your own menu. A rising trend in your own number matters more than whether you are above or below a published median.

Percentage is not profit

A dish with a higher food cost percentage can still earn you more money per plate. Illustrative comparison:

The steak runs at a worse percentage and earns twice as much per plate. This is why chasing a single target percentage across every item can backfire. Look at percentage and gross profit together, and keep in mind that food cost and gross profit are not net profit: labour, rent, utilities and everything else still has to come out of it.

Common mistakes that make the number wrong

• Using purchases instead of usage. Without an inventory adjustment you are measuring ordering, not consumption.
• Costing recipes once and never again. A plate costed last spring may be wrong by now. Re-cost when a major ingredient moves.
• Ignoring yield. See the carrot example above.
• Leaving out the small stuff. Oil, butter, garnish, bread and sauces add up across hundreds of covers.
• Not tracking comps, staff meals and spoilage. Food that leaves the kitchen without a sale still counts as food used.
• Mixing food and beverage. Different margins, different problems.
• Counting inconsistently. Different people counting different ways each week makes the trend unreadable.

What to do when the number drifts

Start with the cheapest checks first.

1. Check prices. Did a supplier raise a major item? Update your recipe costs and see which plates moved. See how to compare restaurant supplier prices.
2. Check counts. Recount your top-cost items. A wrong count is the most common cause of a sudden jump.
3. Check portions. Weigh a few plates during service.
4. Check waste. Run a waste log for two weeks to find out where food is going.
5. Check the menu. If a plate is structurally too expensive, change the recipe, the portion or the price.

If your inventory process is the weak link, start with the practical inventory management guide.

Try it on one recipe

Pick one dish and cost it properly this week, with yield. The free food cost calculator works through ingredients, portions and selling price without needing an account.

If you would rather not rebuild the sums by hand every time a price changes, ChefMind AI's recipe costing pulls ingredient costs from your inventory and shows the food cost percentage per recipe.

The short version

• Restaurant food cost % = (beginning inventory + purchases − ending inventory) ÷ food sales.
• Plate food cost % = plate cost ÷ menu price, with yield included.
• Compare theoretical to actual; the gap is the work list.
• Look at percentage and gross profit together.