For an evenly mixed dish, multiply the whole recipe’s nutrition by your portion’s share of the finished weight. Dividing by the number of containers only works when each container gets an equal share.
Start with the ingredient totals using matching preparation and serving bases. FDA’s label guide explains the serving basis those ingredient values refer to. The division below is an original worked example.
Five containers, two sizes
A hypothetical evenly mixed recipe totals 2,000 calories and 100 g protein. It weighs 1,000 g after cooking. You fill two 150 g containers, two 200 g containers and one 300 g container.
| Container | Share of batch | Calories | Protein |
|---|---|---|---|
| 150 g, each of two | 15% | 300 | 15 g |
| 200 g, each of two | 20% | 400 | 20 g |
| 300 g, one | 30% | 600 | 30 g |
| All five | 100% | 2,000 | 100 g |
For the 150 g container: 150 ÷ 1,000 × 2,000 = 300 calories. The same fraction gives 150 ÷ 1,000 × 100 = 15 g protein.
Weigh the food, not the pot
Record the empty container’s weight or use the scale’s tare function before adding food. Use the total finished edible batch as the denominator. Keep the portion and batch weights in the same unit.
If the dish continues drying or you add more ingredients, its finished weight and composition have changed. Record the batch at a consistent point rather than combining an earlier total weight with later portions.
When weight shares are not enough
A container with mostly rice and another with mostly chicken do not have identical nutrition per gram. For separate components, divide each component individually. For a mixed dish with large pieces, distribute those pieces deliberately or describe the result as an estimate.
The recipe scaler’s equal-portion result is useful for equal shares. For unequal shares, apply the fraction above to the verified whole-recipe totals. Use the recipe portion tool and keep your finished-weight note with the recipe.
Sources and scope
These sources support the factual explanations above. Worked label examples are illustrative where stated. Restaurant comparisons use the listed U.S. portions; availability and local recipes may differ.