Food cost percentage, gross margin and markup describe different relationships. Using the same percentage in all three pricing methods produces different menu prices. Start with the cost of a saleable serving, choose the target you actually use, and recalculate your result after any practical price rounding.
Start with cost per serving
Suppose a batch costs $36 in ingredients and yields 12 saleable portions. Ingredient cost per portion is $36 ÷ 12 = $3. If the stated yield includes portions you cannot actually sell, revise the denominator before pricing. Packaging or included sides must also be included if they belong to the cost basis you are comparing.
Three targets, three answers
At a 30% food cost target, price is $3 ÷ 0.30 = $10. The food cost percentage is $3 ÷ $10 × 100 = 30%. The amount remaining after this entered cost is $7, which is not net profit: labor, rent and other expenses still exist.
At a 30% gross margin target after that same entered cost, price is $3 ÷ (1 − 0.30) ≈ $4.29. At a 30% markup on cost, price is $3 × 1.30 = $3.90. Margin divides the dollars remaining by selling price; markup divides them by cost. The denominator is why the three answers differ.
Check a rounded menu price
If a $10 target is rounded upward to $10.50, the achieved food cost percentage is $3 ÷ $10.50 × 100 ≈ 28.57%. Do not continue reporting 30% as the achieved percentage. Use the Menu Price Calculator to compare target methods and price increments, and the Food Cost Percentage Calculator to check an existing item or a full inventory period.
For a period result, opening inventory + purchases − ending inventory estimates food used; divide by food sales for the same period. A one-serving recipe cost and a month of inventory and sales have different scopes. Keep ingredient costs, yield and sales periods aligned before drawing conclusions about the restaurant.
Price is still a business decision
The calculator can show a price that meets a chosen ingredient-cost percentage, but it cannot establish what customers will pay or whether that item contributes enough dollars after staffing, delivery fees and overhead. Consider comparing both the percentage and the dollar amount left after the entered food cost. A cheaper side item may hit the target percentage while leaving fewer dollars for the rest of the operation than a higher-priced main course.
Use the same currency and portion basis throughout. If the $36 batch includes 12 portions but your price includes two portions, the cost basis for that sale is $6, not $3. Recalculate when supplier prices or actual saleable yield change; an old percentage based on old costs can become misleading without any menu-price change.