How to Calculate Food Cost the Right Way

Food cost is the single most important number in your restaurant. It determines whether you make money or lose it, whether your menu is sustainable, and whether your business can survive long-term.

Yet most restaurant owners either don't calculate it at all, or calculate it incorrectly. This guide will show you exactly how to do it right.

📊 What Is Food Cost?

Food cost is the percentage of your revenue that you spend on food ingredients. It is expressed as a percentage and calculated for individual dishes (dish food cost) and for your entire restaurant (overall food cost percentage).

The industry benchmark:

• Fine dining: 25–32%
• Casual dining: 28–35%
• Fast casual: 25–30%
• Catering: 25–35%

If you're above these benchmarks, you are losing money that should be going to your bottom line.

🧮 The Food Cost Formula

There are two calculations every restaurant operator needs to know:

1. Dish Food Cost Percentage

This tells you what percentage of a dish's selling price is spent on ingredients.

Food Cost % = (Cost of Ingredients ÷ Selling Price) × 100

Example:
Your grilled salmon dish costs $8.50 in ingredients and sells for $28.00.
Food Cost % = ($8.50 ÷ $28.00) × 100 = 30.4%

This is within the acceptable range for fine dining. If the same dish sold for $22.00, the food cost would be 38.6% — too high.

2. Overall Restaurant Food Cost Percentage

This tells you your total food cost across all dishes for a given period.

Food Cost % = (Cost of Food Used ÷ Total Food Revenue) × 100

To calculate Cost of Food Used:

Cost of Food Used = Opening Inventory + Purchases − Closing Inventory

Example:
Opening inventory: $12,000
Purchases during the month: $18,000
Closing inventory: $10,500
Cost of Food Used = $12,000 + $18,000 − $10,500 = $19,500

If your food revenue for the month was $65,000:
Food Cost % = ($19,500 ÷ $65,000) × 100 = 30% ✅

📝 How to Calculate Dish Cost Accurately

To calculate the ingredient cost of a dish correctly, you need a standardized recipe card for every item on your menu. This lists every ingredient with its exact quantity per portion and its cost per unit.

Example — Grilled Chicken Dish:

If this dish sells for $19.00:
Food Cost % = ($5.33 ÷ $19.00) × 100 = 28% ✅

⚠️ Common Mistakes That Inflate Your Food Cost

• Not accounting for waste and trim — if you buy 1kg of fish but only use 700g after trimming, your actual cost per usable gram is higher than you think
• Inconsistent portion sizes — if one cook plates 200g and another plates 260g, your food cost varies wildly between services
• Not updating costs when supplier prices change — ingredient prices fluctuate; your recipe costs should be reviewed monthly
• Ignoring staff meals and wastage — these should be tracked and included in your food cost calculation
• Calculating food cost only monthly — by the time you see the number, it's too late to act. Calculate weekly at minimum.

🎯 How to Use Food Cost to Set Menu Prices

Once you know your ingredient cost for a dish, you can work backwards to set the right selling price:

Selling Price = Ingredient Cost ÷ Target Food Cost %

Example:
Ingredient cost: $6.00
Target food cost: 30%
Selling Price = $6.00 ÷ 0.30 = $20.00

This ensures every dish you sell contributes the right margin to your business — regardless of what competitors charge.

💡 The Bottom Line

Calculating food cost correctly is not complicated — but it requires discipline, standardized recipes, and consistent tracking. Most restaurants that struggle with profitability are not failing because of lack of customers. They are failing because they don't know their numbers.

Know your food cost. Track it weekly. Act on it immediately when it rises above your target. That single habit will do more for your restaurant's profitability than any marketing campaign ever will.

🚀 Want Help Calculating and Fixing Your Food Cost?

Chef Tarek BouGhanam offers a free restaurant profitability audit that includes a full food cost analysis for your operation. No spreadsheets to build from scratch. No guesswork. Just clear numbers and a clear action plan.

📊 Get Your Free Food Cost Audit →

Free. No obligation. Personal review by Chef Tarek BouGhanam.

📱 WhatsApp Chef Tarek Now   |   📅 Book a Consultation