--- title: "Meal Cost & Food Waste Calculator for Restaurants — Worked Example | GoSufra" description: "How to calculate the true cost of a meal after waste and yield, with a worked example on a chicken wrap: why the cost in your head is seven points too low, and how GoSufra's recipe costing updates it by itself with every ingredient price." url: "https://gosufra.com/en/blog/meal-cost-and-waste/" language: "en" source: "https://gosufra.com" --- # Meal cost calculator with waste: know your real profit on every plate How to calculate the true cost of a meal after waste and yield, with a worked example on a chicken wrap: why the cost in your head is seven points too low, and how GoSufra's recipe costing updates it by itself with every ingredient price. 2026-09-30 · 9 min read ![A plate, a scale and an arrow showing cost before and after waste](https://gosufra.com/blog/meal-cost-and-waste.svg) ## Key points - True ingredient cost = purchase price ÷ yield. A kilo of chicken that gives 700 g usable really costs 43% more than the invoice says. - In the example, a wrap its owner thinks costs 31% of the price really costs 39% after waste — over $900 a month on one item. - Waste comes in three kinds: prep waste, spoilage, and food sent back. Each needs a different fix. - GoSufra puts yield inside the recipe, deducts ingredients with every sale, and updates each plate's cost and margin when any ingredient price changes. Most owners know what a dish costs “roughly”. The trouble is that the rough figure is always **lower than the truth**, because it prices ingredients at what you paid, not at the amount that actually reaches the plate after trimming, cooking and spoilage. That gap is waste, and it is where many restaurants’ profit quietly disappears. This article shows, with numbers, how to calculate the **true cost of a meal**, what waste does to it, and how [recipe costing software](https://gosufra.com/en/features/recipe-costing/) does this for you. ## The formula that matters: yield **Yield** is the share of an ingredient that is still usable after preparation. A kilo of chicken breast, trimmed and grilled, might give only 700 g — a 70% yield. > **True cost per kilo = purchase price per kilo ÷ yield** If chicken costs $8 a kilo at 70% yield: 8 ÷ 0.70 = **$11.43** per usable kilo — 43% more than the figure on the invoice. ## A full example: a chicken wrap | Ingredient | Quantity | Cost at purchase price | Cost after yield | | --- | --- | --- | --- | | Chicken ($8/kg, 70% yield) | 150 g cooked | $1.20 | $1.71 | | Flatbread | 1 | $0.30 | $0.30 | | Garlic sauce | 30 g | $0.25 | $0.25 | | Salad and pickles | — | $0.20 | $0.20 | | Packaging | 1 | $0.25 | $0.25 | | **Total** | | **$2.20** | **$2.71** | With a selling price of $7.00 before tax: - **Food cost % in your head:** 2.20 ÷ 7.00 = **31.4%** - **True food cost %:** 2.71 ÷ 7.00 = **38.8%** That is $0.51 per wrap. Sell 60 a day and: 0.51 × 60 × 30 = **over $900 a month** on a single item, invisible in every report because it was “eaten” by waste. ## So what do you do? Three options To bring food cost back to around 32%: 1. **Adjust the price:** 2.71 ÷ 0.32 ≈ $8.50. The market may not accept that in one step — see [raising menu prices when costs rise](https://gosufra.com/en/blog/raising-menu-prices/). 2. **Improve the yield:** a supplier with better-trimmed breasts, knife training, or tighter cooking time and temperature. Every five points of yield changes the plate cost. 3. **Adjust the portion:** 150 g may become 130 g without the guest noticing, if the plate is balanced. Usually the answer is a mix of all three. What matters is that you **decide on the true numbers**, not the rough ones. ## The three kinds of restaurant waste ### 1. Prep waste Bones, skin, fat, peel and weight lost in cooking. This is expected waste, and it belongs **inside the recipe** as a yield percentage. ### 2. Spoilage and expiry Ingredients past their date, stored badly, or prepared in excess and not sold. This is the waste that **must be logged** to be seen. Tracking stock by batch and expiry reduces it. ### 3. Food sent back Plates returned from the floor, or orders made wrong. This tells you something about portion, quality or order accuracy. The first belongs in your cost; the second and third belong in your **waste log**. More detail in [waste and yield](https://gosufra.com/en/blog/waste-and-yield/) . ## How GoSufra’s meal costing handles it - **A recipe per item and per size:** a small and a large wrap have two recipes, not one multiplied by a guess. - **Yield and waste inside the cost:** enter an ingredient’s yield once and every recipe that uses it is costed correctly. - **Plate cost and margin update themselves:** record a purchase at a new chicken price and every dish containing chicken gets a new cost and margin. - **Automatic deduction with every sale:** each wrap sold takes 150 g of chicken, a flatbread and sauce out of [the branch’s inventory](https://gosufra.com/en/features/inventory-management/), so you see shortages before they happen. - **A waste and surplus log:** record spoilage with a reason, and sell surplus rather than binning it. - **Ingredient substitutions:** if one runs out and you use another, cost and stock follow the substitute. - **Allergens and nutrition** per dish. Recipes, waste, surplus and inventory are **all on the free plan**, so you can cost your whole menu today. ## Your stocktake tells you if the recipe is right After a week of sales, count the stock. If the freezer is short more chicken than the recipes deducted, it is one of three things: the kitchen is portioning bigger than the recipe, the yield is lower than you entered, or something is walking out of the door. The gap between **theoretical and actual usage** is the most important number in the kitchen — see [spotting theft in a restaurant’s reports](https://gosufra.com/en/blog/spotting-theft-in-a-restaurant/) . ## Frequently asked questions ### How do you calculate the cost of a meal in a restaurant? Add up the cost of each ingredient at the quantity on the plate, after dividing each ingredient’s price by its yield, and add packaging. Divide by the selling price before tax to get the food cost percentage. ### What is a good food cost percentage? It varies by concept, but many restaurants aim for roughly 28% to 35%. What matters is calculating it on true cost after waste. See [food cost percentage](https://gosufra.com/en/blog/food-cost-percentage/) . ### Does the software update costs automatically? Yes. On GoSufra, when an ingredient’s purchase price changes, the cost and margin of every dish containing it update. ### Where should I start? With your ten best-selling items. They are often most of your sales, and costing them correctly matters more than anything else. - meal cost calculator - recipe costing software - food waste cost - yield percentage - plate cost ## In the product ### [Recipes & Plate Costing](https://gosufra.com/en/features/recipe-costing/) Explore ### [Inventory & Purchasing](https://gosufra.com/en/features/inventory-management/) Explore ## Run all of this from one system POS, kitchen, inventory, recipe costing, staff and accounting — connected, and free to start. [Create your free account](https://app.gosufra.com/register?lang=en) ## Related articles ![Illustration of a plate divided into recipe components with a price tag](https://gosufra.com/blog/plate-costing.svg) Costing 2026-06-01 · 8 min read ### [Plate costing: work it out from the recipe, not from a hunch](https://gosufra.com/en/blog/plate-costing/) A practical guide to costing every dish on your menu — from unit price to yield and waste, ending in a sell price that actually protects your margin. Read article ![Illustration of a funnel narrowing from top to bottom](https://gosufra.com/blog/waste-and-yield.svg) Inventory 2026-06-29 · 6 min read ### [Waste and yield: the gap between the kilo you buy and the kilo you serve](https://gosufra.com/en/blog/waste-and-yield/) How to measure yield per ingredient, separate the four kinds of waste, and turn shrinkage from a vague month-end number into something you manage weekly. Read article ![Illustration of a percentage ring beside report lines](https://gosufra.com/blog/food-cost-percentage.svg) Costing 2026-06-15 · 7 min read ### [Food cost percentage: the one number that reads your health](https://gosufra.com/en/blog/food-cost-percentage/) How to calculate food cost percentage properly from stocktakes rather than invoices, what separates theoretical from actual, and what to do when the gap widens. Read article [← All articles](https://gosufra.com/en/blog/) [Contact us](https://t.me/GoSufraSupport)