Raw Weight Is Not Cooked Weight: A Measured Batch-Yield and Portion Workbook
SHUPA editorial · 27 October 2026 · Measured kitchen planning, not a nutrition prescription.
Your recipe starts with dry rice. Your lunch box contains cooked rice. Those are not interchangeable weights. Rather than borrow a universal conversion factor, weigh one batch in the form you actually use and record its yield. This workbook connects that batch to cooked portions and ingredient cost.
Unlike our recipe-scaling tool, this starts with an observed result—not the number of servings you hope to make. It does not calculate calories, nutrient retention, safe cooking or a recommended portion size.
1. Define the batch before touching the calculator
Use one food or one consistently defined batch. “Raw weight” here means the prepared edible input you choose to track: for example, dry rice before cooking, or vegetables after trimming. “Cooked weight” means the edible result in a stated condition, such as drained and ready to portion. Use grams for both. Do not subtract a volume in millilitres from a mass in grams.
Tare the empty weighing container. Keep bones, packaging and inedible trimmings out of one side if you have excluded them from the other. Write down whether sauce or other ingredients are included. Added ingredients make the ratio a whole-batch allocation, not a conversion for each ingredient.
The USDA Food Buying Guide distinguishes food as purchased from its edible prepared form and treats yield information as a planning aid. Its reference yields are not a promise that your cooking method will produce the same result. The calculator below uses your own measured inputs; it is not a USDA tool.
2. Calculate the measured yield and portions
3. Read the numbers correctly
All numbers here are fictional teaching examples, not cooking-test results. In that example, yield is 560 ÷ 200 = 2.8 times the raw weight, or 280%. Each 140 g portion is one quarter of the cooked batch, so it is allocated one quarter of the original input: 50 g. At a batch ingredient cost of 1.60 currency units, each portion is allocated 0.40.
A ratio above 100% is not an error when the cooked food has gained water or other included mass. Nor does a lower ratio automatically mean waste. The calculator describes your defined mass relationship; it does not explain every change in the food.
| Fictional batch | Raw → cooked | Cooked portion | Allocation |
|---|---|---|---|
| Hydrated grain example | 200 g → 560 g | 140 g | 4 full portions; 50 g raw input allocated to each |
| Roasted-food example | 600 g → 450 g | 150 g | 3 full portions; 200 g raw input allocated to each |
“Raw input allocated” is not a nutritional equivalence. It divides the starting quantity across your finished batch. Do not use it to convert a cooked-food nutrition entry into a raw-food entry or to assume that every nutrient stayed in the food. Oil, sauces, drainage and mixed ingredients require their own accounting.
4. Keep the remainder visible
Suppose a different fictional batch weighs 900 g and you choose 200 g portions. That makes four full portions and 100 g left over, not five full portions. Allocate a use for the remainder rather than quietly increasing every container and continuing to record 200 g.
If you enter a desired portion larger than the entire batch, the tool reports zero full portions. It does not recommend a smaller meal or silently scale up the recipe. Choose an appropriate portion for your needs or plan a different batch; this workbook does not set dietary targets.
5. Use three observations before changing the shopping plan
| Batch | Food and measured condition | Raw / cooked grams | Method difference to investigate |
|---|---|---|---|
| 1 | ____ | ____ / ____ | ____ |
| 2 | ____ | ____ / ____ | ____ |
| 3 | ____ | ____ / ____ | ____ |
Keep the food, trimming rule and weighing condition comparable. If one batch includes sauce and another does not, do not average them as though the only difference were cooking loss. Three observations are a practical starting exercise, not statistical validation or a guaranteed conversion factor. For the next shop, use a cautious planning range and measure again.
Food handling takes priority over completing a worksheet. Do not leave perishable food out to finish the arithmetic. Follow the cooling, storage and reheating checklist separately; neither the ratio nor the clock proves safe doneness.
Use recipe scaling and pack-size planning before purchasing, and the recipe cost calculator to allocate ingredient spend. This yield workbook then checks what the actual batch produced. Return to all practical food guides.
Formulas: yield = cooked ÷ raw; raw allocation = raw × portion ÷ cooked; full portions = whole-number part of cooked ÷ portion; remainder = cooked − full portions × portion; allocated portion cost = batch cost × portion ÷ cooked. SHUPA designed the worksheet and examples; no household trial or health outcome is claimed. USDA source checked 27 October 2026. Featured photograph: Pille R. Priske / Unsplash licence. Corrections: contact SHUPA.