What Is Yield Percentage?
A kilo on the supplier’s bill is never a kilo in the pan.
Yield percentage is the share of a raw ingredient that survives trimming, peeling and deboning. It compares usable weight with the weight you paid for, and it is the number that turns a purchase rate into what the food really costs. In an Indian kitchen buying whole chicken, mutton on the bone or unpeeled vegetables, those two weights are rarely close.
Trim loss like this is not unusual. Almost every kitchen gives up weight to bone, skin, peel or stalk, and that loss is a cost whether or not anyone measures it.
How to Work Out Yield Percentage
The formula is short:
Yield % = (usable weight ÷ purchased weight) × 100
A yield test is how you get the usable weight honestly:
- Weigh it whole, as it arrives, before anything is cut
- Prepare it the way your kitchen actually does, not the way a book says
- Weigh the usable part that is left, before any cooking
- Weigh the trim too, so the two parts add back to the start
- Repeat it across a few deliveries, because one bad crate proves nothing
Published tables exist. The ICMR National Institute of Nutrition’s Indian Food Composition Tables publish edible-portion figures for Indian foods and are a fair starting point, though your own test will still be closer, because your supplier, your cuts and your chef are in nobody’s table.
Yield Percentage vs Food Cost Percentage
Yield and food cost are both percentages about food, and they get muddled constantly.
| Aspect | Yield percentage | Food cost percentage |
|---|---|---|
| Measures | Weight that stays usable | Cost as a share of sales |
| Applies to | One ingredient | A dish, or the whole menu |
| Moves with | Supplier and trimming | Price, portion and menu mix |
| Good result | Higher | Lower |
| Feeds into | Recipe costing | Your food cost line |
Yield comes first. Get it wrong and every recipe cost built on top of it leans the same way, always in the direction that flatters your margin.
Yield Percentage Example
Take a chicken-forward kitchen in Thrissur, Kerala, testing a delivery in June 2026.
| Line | Figure |
|---|---|
| Bought | 10 kg whole chicken |
| Rate | Rs.182 per kg |
| Paid | Rs.1,820 |
| Usable | 6.4 kg after bone and trim |
| Trim | 3.6 kg, which adds back to 10 kg |
| Yield | 6.4 ÷ 10 × 100 = 64% |
| Real cost | Rs.284.38 per usable kg |
Note: this is an invented example for illustration only. The figures show the method, not a real supplier’s rates.
The kitchen believed its chicken cost Rs.182. It cost Rs.284.38, which is 56% more. Price a dish off the bill rate and the margin you think you are earning does not exist.
Where a Low Yield Quietly Eats Margin
Nobody notices yield, because nothing looks wrong. The stock arrives, the dish sells, the bill is paid.
What you cannot see is the gap between what the menu should have consumed and what actually left the store. A recipe costing calculator will price a dish properly once you feed it the real usable cost, and this food cost calculator template does the same job in a sheet.
Say a menu costs a portion at 150 g of boneless chicken, while the kitchen quietly works from a yield nobody ever measured. The shortfall never shows up as a missing ingredient. It surfaces months later as a consumption report that will not reconcile against sales, by which point nobody remembers which delivery started it.
Across the kitchens we work with, yield is the figure most often assumed rather than tested. It also moves: a monsoon crate of vegetables and a January one do not trim the same way, which is why material consumption can drift without a single price changing.
Start From a Yield You Measured
Any deduction from stock quietly assumes a yield. Measure yours, and everything built on top of it starts meaning something.
Petpooja POSS puts inventory on item-wise auto deduction, sends low-stock alerts and produces day-end inventory reports, so every dish sold moves stock without anyone keying it in. That deduction is only ever as good as the quantities sitting behind it, which is why the weighing comes first. There is more on tightening the whole loop in this restaurant inventory management guide.
Weigh one delivery this week and see how close your assumed cost was.
Frequently Asked Questions
No. Yield is weight, measured on one ingredient before cooking, while food cost percentage is money, measured across dishes after they sell. If a 64% yield turns a Rs.182 rate into Rs.284.38, that is yield doing the work, not food cost.
Once per ingredient to start, then again whenever the supplier, the season or the cut changes. Most kitchens find quarterly is enough for staples and more often for fresh produce.
Easily. The same vegetable from two suppliers, at one rate, can trim out several percentage points apart. On a 10 kg delivery, five points is half a kilo you paid for and cannot serve.
Keep them separate. Yield normally covers preparation loss up to the pan, and cooking loss is measured after, so mixing the two hides which step is costing you.
