By Heidi Macomber · July 10, 2026 (updated July 28, 2026)

How to Cost a Plate of Food: The Complete Guide

Cost a plate of food by listing every ingredient, converting purchase units to recipe units, adjusting for yield, and dividing by servings. A chicken plate that costs $3.40 to make should sell for $12-14 to hit a 25-28% food cost. Here is exactly how to get there, step by step.

If you have ever stared at a menu wondering whether you are actually making money on a dish, you already know why plate costing matters. The problem is that most food business owners either skip it entirely or do it once and never update it. Ingredient prices change constantly -- eggs spiked 40% in early 2025, and if you did not update your recipes, your margins quietly disappeared.

This guide walks through the full process with real numbers so you can cost any plate in your business.

What Does "Cost a Plate" Mean?

Costing a plate means calculating the exact ingredient cost of one serving of a dish. It does not include labor, rent, or utilities -- just the food. This is different from menu price, which is what the customer pays, and it is different from food cost percentage, which is the ratio between the two.

The relationship is simple:

Plate Cost / Menu Price = Food Cost Percentage

If your plate cost is $3.40 and your menu price is $12.00, your food cost percentage is 28.3%.

Step 1: Write Down Every Ingredient

Start with a single recipe. Write down every ingredient that goes into the dish, no matter how small. People frequently forget:

  • Cooking oil (2 tablespoons of canola = about 4 cents)
  • Salt and pepper (negligible per dish, but track it if you use large amounts)
  • Garnishes (a sprig of cilantro, a lime wedge)
  • Condiments (ketchup, hot sauce, sour cream at a self-serve station)
  • Packaging for takeout (containers, lids, bags)

For our example, let us cost a chicken rice bowl that serves 4.

Step 2: Convert Purchase Units to Recipe Units

This is the step where most spreadsheets break down. You buy ingredients in one unit but use them in another. Here is the conversion table you need:

Dry Conversions

To Convert Multiply By Example
Cups to ounces (flour) 4.5 oz/cup 2 cups flour = 9 oz
Cups to ounces (sugar) 7 oz/cup 1 cup sugar = 7 oz
Tablespoons to ounces 0.5 oz/tbsp 3 tbsp = 1.5 oz

Liquid Conversions

To Convert Equivalent Example
1 cup 8 fl oz / 237 ml 2 cups = 16 fl oz
1 tablespoon 0.5 fl oz / 15 ml 4 tbsp = 2 fl oz
1 teaspoon 0.17 fl oz / 5 ml 3 tsp = 1 tbsp

Weight-to-Count

Some ingredients are bought by weight but used by count. A single large egg weighs about 2 oz (50g). A slice of cheese is about 0.7 oz (20g).

Step 3: Calculate Cost Per Ingredient

For each ingredient, multiply the recipe quantity (converted to purchase units) by the price per unit you paid.

Chicken Rice Bowl (serves 4) -- Full Breakdown:

Ingredient Purchase Price Recipe Amount Converted Cost
Chicken breast $3.49/lb 1.5 lb raw 1.5 lb $5.24
Long grain rice $1.20/lb 2 cups dry 0.94 lb $1.13
Chicken broth $2.50/32oz 3 cups 24 oz $1.88
Yellow onion $0.89/lb 1 medium 0.5 lb $0.45
Garlic $4.00/lb 3 cloves 0.05 lb $0.20
Olive oil $14.00/750ml 2 tbsp 30 ml $0.56
Soy sauce $3.50/20oz 3 tbsp 1.5 oz $0.26
Frozen peas $1.50/lb 1 cup 0.35 lb $0.53
Sesame oil $8.00/8.5oz 1 tsp 0.17 oz $0.16
Green onion $0.99/bunch 2 stalks 0.1 bunch $0.10
Total recipe cost $10.51

Plate cost per serving: $10.51 / 4 = $2.63 per bowl

Step 4: Adjust for Yield

Raw ingredients lose weight during cooking and prep. If you skip this step, your plate cost is artificially low.

Common yield percentages:

Ingredient Yield % Why
Chicken breast (raw to cooked) 75-80% Moisture loss
Onions (peeled) 90% Skin removal
Potatoes (peeled) 80% Peel loss
Carrots (trimmed) 82% Top and tip removed
Rice (dry to cooked) 300% yield (gains weight) Water absorption

For our chicken: 1.5 lb raw at 78% yield gives us 1.17 lb usable cooked chicken. The effective cost per usable pound is $3.49 / 0.78 = $4.47. For 1.5 lb raw, usable output costs the same ($5.24), but the per-serving yield is smaller, meaning you might need to buy more to hit the same portion size.

Step 5: Set Your Menu Price

Now apply your target food cost percentage:

Menu Price = Plate Cost / Target Food Cost %

At 28% target: $2.63 / 0.28 = $9.39

At 25% target: $2.63 / 0.25 = $10.52

Round to a menu-friendly price: $10.50. At that price, your food cost percentage is $2.63 / $10.50 = 25% -- excellent.

How Often Should You Re-Cost Plates?

The answer depends on how volatile your ingredient prices are:

  • Proteins (chicken, beef, pork, seafood): Monthly. Prices swing 10-20% in a single quarter.
  • Dairy: Monthly. Eggs and butter are notoriously volatile.
  • Produce: Seasonally. Check prices at the start of each season.
  • Dry goods (flour, sugar, rice): Quarterly. More stable but still drifts.

The biggest mistake is setting prices once and never revisiting. A 10% increase in your top ingredient can quietly push a profitable dish into the red.

The Spreadsheet Trap

Most food businesses start plate costing with a spreadsheet. It works for a week or two, then becomes unmaintainable because:

  • Every supplier price change requires manual updates across multiple recipes
  • Unit conversions are error-prone when done by hand
  • There is no easy way to see how a price change ripples across your whole menu
  • Nobody remembers to update it

That is exactly the problem Percy Plate solves. You enter each ingredient once with its supplier price. Every recipe using that ingredient recalculates automatically when prices change. You see plate costs, food cost percentages, and suggested menu prices in real time.

Cost your first plate free at percyplate.com -- takes under 2 minutes.

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