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Published by Saura ·

Raw vs cooked food weight: choose the matching nutrition entry

A bowl of cooked rice and the dry rice used to make it have different weights. Both can be logged sensibly when the weight and nutrition entry describe the same preparation.

Quick answer

Pair a raw or dry weight with a raw or dry entry, and a cooked weight with a cooked entry. For a shared recipe, total the ingredients before cooking, weigh the finished edible batch and allocate nutrients by the fraction you eat.

Why the number per 100 g changes

Rice, pasta and dried beans usually gain water during cooking. Meat and roasted vegetables often lose water, and meat may also lose fat into the pan. A cooked food can therefore have more or less energy per 100 g without nutrients appearing from nowhere.

There is no single conversion factor for every food. Grain variety, cooking time, draining and equipment affect the finished weight. A measured yield for your own batch is more useful than a universal raw-to-cooked multiplier.

Worked example: divide a finished batch

Suppose a hypothetical pot contains 600 kcal in all its ingredients and weighs 900 g after cooking. A 225 g serving is one quarter of the finished weight, so it contains an estimated 150 kcal. This is an arithmetic example, not a measured value for rice or another food.

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Illustrative batch calculation
StepCalculation
Serving fraction225 g ÷ 900 g = 0.25
Serving energy600 kcal × 0.25 = 150 kcal
Other nutrientsMultiply each batch total by 0.25

Choose one practical workflow

For a single packaged food, use its label and weigh it in the state described by that label. For a shared home-cooked dish, use a recipe and final yield. For a plated leftover, use the saved recipe or a matching cooked entry.

  • Dry couscous weight goes with a dry couscous entry.
  • Cooked drained brown rice weight goes with cooked brown rice.
  • A raw turkey-breast label should not be applied to a smaller cooked weight.
  • Bones, shells, peel and drained liquid belong outside edible weight when discarded.

Account for what leaves the pan

Ingredient totals are an estimate when fat, cooking liquid or solids are discarded. Record a reasonable assumption and keep it consistent. Do not subtract an invented amount simply to make a meal fit a target.

When saving leftovers, label the recipe with its preparation state and final weight. Cool and store food safely; weighing a batch does not replace food-safety guidance.

A practical next step

Choose one food you eat regularly, such as rice. Save its preparation state with the entry, then measure one batch's dry ingredient and finished cooked weight. Reuse that yield only when the preparation is comparable.

Nutrition values and photo results are estimates. Check ingredients and portions before saving a meal.

Keep exploring

Frequently asked questions

Should I weigh food raw or cooked?

Either can work. Choose the state that matches the entry or package label and use that method consistently for the same food.

Does cooking add calories to plain rice?

Water adds weight, not energy. Oil, butter or other added ingredients contribute energy and should be included.

Sources and method