Yield percentage is the share of a raw ingredient that survives trimming and cooking to reach the plate. If you buy a 1 kg item at ₹200 but only 700 g is usable, your real cost is ₹286 per usable kg, not ₹200 — a 43% jump. Costing on purchase weight instead of edible yield is one of the most common reasons a menu looks profitable on paper but is not in the till.
The gap between what you buy and what you serve
You pay for a whole cauliflower, a whole fish, a full crate of tomatoes. You do not serve all of it. Stalks, bones, skin, trim, peel, and the shrinkage that happens when things cook — all of it is money you paid for that never reaches a plate. That gap is measured by yield percentage, and ignoring it is why so many carefully costed menus still miss their margin.
How to calculate yield percentage
Yield % = (edible weight ÷ purchased weight) × 100. Weigh the raw item, prep it as you normally would, weigh what is actually usable, and divide.
A 1 kg cauliflower that gives 650 g of florets has a 65% yield. A whole chicken might yield 70–75% after boning; leafy greens can drop below 60% once stalks and wilt are gone. These are not edge cases — they are every day, on every prep list.
Turning yield into a true cost
Once you know the yield, the real cost per usable kilo is simple: edible-portion cost = purchase price ÷ yield %.
Buy that cauliflower at ₹40/kg with a 65% yield and your usable cost is ₹40 ÷ 0.65 = ₹61.5 per usable kilo. The number you feed into recipe costing should be ₹61.5, not ₹40 — otherwise every dish using it is under-costed by a third and you never find out why the month came up short.
Standard portions: the other half of the equation
Yield controls the input; portion control controls the output. If one cook plates 180 g of a curry and another plates 240 g, the same dish costs you wildly different amounts depending on who is on the line — and your careful plate cost is fiction.
- Weigh, don't eyeball. A portion scale on the pass pays for itself in weeks. Ladles, scoops and pre-portioned proteins standardise the rest.
- Write the spec down. A portion is only "standard" if it is documented. Put gram weights on your recipe cards.
- Audit occasionally. Weigh a few plates during service now and then. Portion creep is gradual and invisible until you measure it.
Why a percentage point here is worth chasing
Food cost in a healthy kitchen runs on tight margins — a few points of food-cost percentage is the difference between a good month and a break-even one. Trim loss and portion creep are exactly where those points leak, silently, because nothing on your P&L is labelled "over-portioning." Standardising yield assumptions and portion sizes is unglamorous, but it is often the fastest lever a kitchen has to move its food cost percentage without touching a single menu price.
Portion Control & Yield Calculator
Find true edible yield after trimming and waste, and the real cost per edible kg. Essential for accurate recipe costing.
Step by step
Find the true cost of an ingredient after yield loss.
- Weigh the raw purchased item. Note the weight and the price you paid.
- Prep it as you normally would. Trim, bone, peel or clean exactly as your kitchen does in service.
- Weigh the usable, edible portion. Weigh only what actually reaches the plate.
- Calculate yield % and edible cost. Yield % = edible ÷ purchased. Edible cost = purchase price ÷ yield %. Use that higher cost in recipe costing.
Frequently asked questions
What is yield percentage in a kitchen?
Yield percentage is the proportion of a raw ingredient that remains usable after trimming, cleaning and cooking. It equals edible weight divided by purchased weight, times 100. A 1 kg item giving 700 g usable has a 70% yield.
How does yield affect food cost?
Costing on purchase weight instead of edible yield understates your true ingredient cost. An item bought at ₹200/kg with a 70% yield actually costs ₹286 per usable kilo. Ignore it and every dish using that ingredient is under-costed, quietly inflating your real food cost.
How do I standardise portion sizes?
Document gram weights on recipe cards, use portion scales, ladles and scoops on the pass, and audit a few plates during service periodically to catch portion creep before it moves your food cost.
Keep reading
How to Cost a Recipe and Price a Plate: The Indian Restaurant Guide
A step-by-step guide to costing any recipe ingredient-by-ingredient, finding your true cost per portion, and setting a menu price at the food-cost % you actually want.
Food Cost Percentage: The Number That Quietly Decides Your Month
What food cost percentage is, how to calculate it with a stock-take, the benchmark bands for Indian restaurants and cloud kitchens, and why weekly beats monthly.