Food Cost Formula: How to Calculate Food Cost Percentage
March 7, 2026 · 8 min read
28–32%
Industry target food cost
Every percentage point above this target costs a restaurant doing $1M/year in food sales roughly $10,000 annually. Here are the formulas to get it right.
Whether you're pricing a new menu item or figuring out why your margins shrunk last month, it all comes back to food cost formulas. This guide covers every calculation you need — from the basic percentage to actual-vs-theoretical variance — with real numbers from real kitchens. And when you're ready to run the math on your own dishes, the food cost calculator does it instantly.
The Basic Food Cost Formula
Every food cost calculation starts here. This formula tells you what percentage of your revenue goes to ingredients over a given period (typically weekly or monthly).
Formula
Food Cost % = (Cost of Goods Sold / Total Food Revenue) × 100
Worked Example
Beginning inventory: $14,200
+ Purchases this week: $6,800
- Ending inventory: $12,400
= COGS: $8,600
Total food sales: $28,500
Food cost: ($8,600 / $28,500) × 100 = 30.2%
Takeaway: Run this calculation weekly, not monthly. Monthly numbers hide problems — a bad week of waste gets averaged out and you miss it entirely.
Food Cost Percentage Formula (Per Dish)
The per-dish formula is what you use when pricing menu items. It tells you how much of each plate's price goes to ingredients.
Formula
Dish Food Cost % = (Ingredient Cost / Menu Price) × 100
Example: Grilled Salmon Plate
6oz Atlantic salmon fillet: $4.20
Asparagus (4 spears): $0.85
Lemon-butter sauce (2oz): $0.40
Rice pilaf (6oz): $0.30
Garnish & oil: $0.25
Total ingredient cost: $6.00
Menu price: $22.00
Food cost: ($6.00 / $22.00) × 100 = 27.3%
“Price your menu from the plate up, not from the competition down. Know your costs first, then decide what the market will bear.”
Try it yourself: Open the Food Cost Calculator
How to Calculate Food Cost Per Serving
Cost per serving breaks a bulk recipe down to what each individual plate actually costs you. This is essential for batch recipes like soups, sauces, and prep items.
Formula
Cost Per Serving = Total Recipe Cost / Number of Servings
Example: House Marinara (1 gallon batch)
28oz can San Marzano tomatoes (x2): $6.98
Yellow onion (1 large, diced): $0.75
Garlic (6 cloves): $0.30
Olive oil (3 tbsp): $0.45
Fresh basil (1/4 bunch): $0.60
Salt, pepper, red pepper flakes: $0.12
Total batch cost: $9.20
Yield: 16 servings (4oz each)
Cost per serving: $9.20 / 16 = $0.58
Takeaway: Always cost your sauces and prep items per serving, then add those costs to the plate they end up on. Skipping sub-recipe costing is the #1 reason food cost reports don't match reality. Use a recipe cost calculator to speed this up.
Actual vs. Theoretical Food Cost
Theoretical food cost is your ideal number — what you'd spend if every portion were perfect, nothing spoiled, and zero waste. Actual food cost is reality. The gap between them reveals how much money is leaking out of your kitchen.
Theoretical Food Cost
Sum of (recipe cost × units sold) / total food revenue
Based on standardized recipes and POS sales mix. Assumes perfect execution.
Actual Food Cost
(Beginning Inv. + Purchases - Ending Inv.) / total food revenue
Based on physical inventory counts. Includes all waste, theft, and portioning errors.
Variance Formula
Variance = Actual Food Cost % - Theoretical Food Cost %
| Variance | What It Means | Action |
|---|---|---|
| 0-2% | Excellent control | Maintain current systems |
| 2-5% | Normal but improvable | Review portioning and waste logs |
| 5-8% | Significant loss | Audit top 10 ingredients, check for theft |
| 8%+ | Critical problem | Shut down and retrain immediately |
“A 3% variance on $30,000 in weekly food sales costs you $900 a week — that's $46,800 a year walking out of your kitchen.”
Takeaway: Track your variance weekly. Start by costing your top 10 ingredients by volume — they typically account for 60-70% of total food spend. Run each through the food cost calculator to establish your theoretical baselines.
Ideal Food Cost Percentage by Restaurant Type
There is no single “correct” food cost. A steakhouse at 38% can be more profitable than a pizza shop at 26% because check averages, table turns, and beverage programs all factor in. Use these benchmarks as starting points, not gospel.
| Restaurant Type | Target Food Cost | Notes |
|---|---|---|
| Quick Service / Fast Food | 20-25% | High volume, simple menus, low-cost proteins |
| Fast Casual | 25-30% | Better ingredients, moderate check average |
| Casual Dining | 28-32% | Full service, balanced cost-to-price ratios |
| Fine Dining | 30-35% | Premium sourcing, higher labor offsets margin |
| Pizza | 18-24% | Flour/cheese are cheap; high perceived value |
| Steakhouse | 35-40% | Protein-heavy; compensate with beverage margins |
| Seafood | 30-35% | Volatile protein costs; price fluctuates weekly |
| Bar / Pub | 28-32% | Food cost offset by 18-24% beverage cost |
Industry Average
28-32%
Prime Cost Target
< 65%
food + labor combined
Profit Margin
3-9%
net, full-service avg
Warning: Don't compare your food cost to national averages without context. A 34% food cost is healthy for a steakhouse but a red flag for a pizza concept. Always benchmark against your restaurant type.
5 Common Food Cost Mistakes (and How to Fix Them)
These mistakes cost the average restaurant $20,000-$50,000 per year. Every one of them is fixable.
Stop guessing — calculate your real food cost now
Quick Reference Cheat Sheet
Bookmark this. Every formula you need in one place.
Food Cost Formulas — Cheat Sheet
Overall Food Cost %
(COGS / Total Food Revenue) x 100
COGS = Beginning Inv. + Purchases - Ending Inv.
Per-Dish Food Cost %
(Ingredient Cost / Menu Price) x 100
Sum all ingredient costs for one plate
Cost Per Serving
Total Recipe Cost / Number of Servings
Use for batch recipes (sauces, soups, prep)
Menu Price (from target %)
Ingredient Cost / Target Food Cost %
E.g., $4.50 / 0.30 = $15.00 minimum price
AvT Variance
Actual Food Cost % - Theoretical Food Cost %
Target: under 2%. Above 5% = investigate
Yield-Adjusted Cost
Purchase Price / Yield %
E.g., $12.99/lb / 0.82 yield = $15.84/lb real cost
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