Restaurant Food Cost Calculator: How to Actually Use It (With Examples)

Every restaurant owner knows the food cost formula. Almost none of them use it correctly. The reason is simple: the standard "food cost calculator" you find online asks you to type in numbers you don't actually have to hand — which means you guess, and the answer is wrong. Here is the formula, how to use it properly, and why connecting it to your real sales and stock data changes everything. THE FOOD COST FORMULA Food Cost % = (Cost of Goods Sold ÷ Total Sales) × 100 Cost of Goods Sold (COGS) = Starting Inventory + Purchases − Ending Inventory Example: - Starting inventory: €3,000 - Purchases this month: €8,000 - Ending inventory: €2,500 - Total sales: €30,000 COGS = 3,000 + 8,000 − 2,500 = €8,500 Food Cost % = (8,500 ÷ 30,000) × 100 = 28.3% WHAT'S A GOOD FOOD COST PERCENTAGE? - Fine dining: 28-32% - Casual restaurants: 28-35% - Pizzerias: 20-28% - Bars (food): 30-35% - Cafes: 25-30% Anything above 35% and you're almost certainly losing money once wages and rent are added. WHY MOST CALCULATORS GIVE THE WRONG ANSWER Standalone calculators assume you can type in your inventory, purchases and sales accurately. In reality: - You don't know exact purchases unless someone manually adds up every supplier invoice. - You don't track wastage, so "ending inventory" is actually inflated. - Sales come from the till but nobody copies them into the calculator daily. Result: the percentage you calculate once a month is too low because wastage is hidden inside it. HOW A CONNECTED SYSTEM FIXES THIS When your supplier invoices, stock prices, food wastage and daily sales all live in one system, the food cost percentage calculates itself — every single day. In Restauranteur: - Supplier invoices auto-sum into purchases. - Food wastage is tracked per item and pulled into COGS separately so you can see how much you're losing to spoilage. - Daily sales feed straight into the denominator. - Stock price history shows you the moment a supplier pushes prices up so you can react in days, not months. The dashboard then shows your real food cost percentage today, this week, this month — and against your target. THE ONE THING THAT MOVES THE NEEDLE If your food cost is too high, the fastest fix is almost never "use cheaper ingredients". It's catching the supplier price change you didn't notice. A 7% jump in chicken price over three months will quietly cost a 30-cover restaurant €4-6k a year. A system that logs every price change the moment it happens pays for itself the first time it catches one. Try it free at restauranteur.app.