Food Cost Formula

Two core formulas cover most restaurant needs:

Per-dish food cost %: (Ingredient Cost ÷ Menu Price) × 100. A dish that costs $4.50 in ingredients and sells for $15 has a 30% food cost.

Actual (overall) food cost %: (Beginning Inventory + Purchases − Ending Inventory) ÷ Total Food Sales × 100. This shows what you actually spent across your entire operation, including waste and overportioning.

For a step-by-step walkthrough of both, see our guide to calculating food cost.

Divide the cost of ingredients by the selling price, then multiply by 100. The formula: Food Cost % = (Food Cost ÷ Selling Price) × 100.

Per dish: a $5 ingredient cost on a $16 menu item = 31.3% food cost. For your whole operation: divide total food purchases for a period by total food revenue. Our food cost percentage calculator handles both approaches, and our food cost percentage formula guide covers every variation.

Benchmarks by restaurant type:

Pizzerias: 18-22% — dough, sauce, and cheese are inexpensive.
Fast casual/QSR: 25-28% — high volume, simpler prep.
Full-service casual: 28-32% — the most common target.
Fine dining: 35-40% — premium ingredients like fresh seafood and wagyu.

If you are consistently above 35% outside fine dining, review pricing, portions, and waste. The key is that your overall prime cost (food + labor) stays below 60-65% of revenue.

Ideal (theoretical) food cost is what you should spend based on standardized recipes and your sales mix — every dish portioned perfectly, zero waste.

Actual food cost is what you really spent, calculated from inventory and invoices.

The gap between them is called "variance" and it reveals operational problems:
Under 2%: Tight operation — your kitchen runs to spec.
2-5%: Investigate portioning, waste, and unrecorded comps.
Over 5%: Needs immediate attention. Audit your highest-volume items first.

For strategies to close the gap, read our guide on how to control food cost.

No. Food cost only covers raw ingredients. Labor is tracked separately. Food cost + labor cost = "prime cost," which most restaurants keep under 60-65% of revenue.

Tracking them separately makes it easier to identify which area needs improvement. Use our restaurant labor cost calculator for the labor side, and our restaurant profit margin calculator to see the full picture.

Weekly is ideal — every time you receive supplier invoices. At minimum, do a full actual vs. ideal comparison monthly using physical inventory counts.

Ingredient prices change with seasons and supply disruptions. A 10% increase in chicken price can silently erode margins across multiple dishes. Restaurants that track weekly catch problems within days. Those that wait until month-end lose 3-4 weeks of profit before they notice.

Use the pricing formula: Menu Price = Cost per Serving ÷ Target Food Cost %.

If a dish costs $5.00 in ingredients and you target 30% food cost: $5.00 ÷ 0.30 = $16.67 minimum menu price. Round up to $17 and adjust based on your market.

This formula gives you a floor, not a ceiling. Factor in perceived value, competitor pricing, and demand. Our menu pricing calculator and selling price calculator automate this. For menu-wide strategy, see our menu engineering guide.

Food cost variance is the difference between your actual food cost percentage and your ideal food cost percentage. It isolates operational problems (waste, theft, overportioning) from pricing problems.

Example: a restaurant with 30% ideal food cost but 36% actual food cost has a 6-point variance. That means roughly 6 cents of every dollar in food sales is lost to operational issues — not bad pricing.

To fix variance, start with your highest-volume items. A 1-oz overportioning on chicken across 200 plates/week at $0.35/oz = $70/week or $3,640/year wasted on a single ingredient. Use our food cost calculator to recost your top sellers and identify the biggest offenders.