When to use this calculator
Cooking can change water and fat content, so portion comparisons should use a consistent raw or cooked basis.
Explore the recipes & portions calculators for other questions in this topic. For a related calculation, use the Cups to Grams Calculator: Convert cup volume to ingredient mass using an explicit cup convention and density.
PUTTING IT INTO PRACTICE
Cooking Weight Loss: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Raw weight (g) | 1,000 |
| Cooked weight (g) | 750 |
| Result | 25 % |
- Check the input labels and enter the example values above.
- Apply the relationship: Weight loss (%) = (raw − cooked)/raw × 100.
- The result is 25 %, rounded for display.
How to interpret your result
A negative value indicates weight gain, such as water absorption. This does not directly measure nutrient loss.
Raw, cooked and trimmed weights are different measurement stages. An edible-yield percentage describes the remaining share after preparation. Scaling ingredient amounts does not automatically scale cooking time.
Frequently asked questions
Should portion weights use raw or cooked food?
Use whichever basis your recipe or serving plan requires, and state it consistently. Do not compare raw weights directly with cooked weights.
When is the cooking weight loss calculator useful?
Cooking can change water and fat content, so portion comparisons should use a consistent raw or cooked basis.
How do I use the cooking weight loss calculator?
Enter raw weight (g), cooked weight (g). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Weight loss (%) = (raw − cooked)/raw × 100.
What should I check before using the result?
A negative value indicates weight gain, such as water absorption. This does not directly measure nutrient loss.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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