Recipe Yield and Portion Size: Calculate Unequal Servings

Updated 17 October 2026 · Reviewed by Tools by Layna Editorial Team · General information only

“Makes six” is a recipe instruction, not a measurement of the food on your plate. Once a batch is cooked, its actual yield provides a useful denominator for portions that are larger or smaller than the average.

Start with the batch you will actually eat

First estimate energy from all ingredients, including oils, sauces and toppings that stay in the finished food. Weigh the empty container, then the container holding the cooked batch. Subtract the empty-container weight. Use the edible batch, excluding bones, discarded liquid or other parts that are not being eaten.

Keep a note of when you weigh it. A simmered sauce can continue losing water, so portions taken at different stages may not have the same density. FSANZ explains why final recipe weight matters when food gains or loses water during preparation.

Convert total energy into energy per gram

Consider a hypothetical, well-mixed batch with 1,800 kcal and a final edible weight of 1,500 g. Energy density is 1,800 ÷ 1,500 = 1.2 kcal/g, or 120 kcal per 100 g. Multiply that density by each portion’s weight.

Dividing the whole batch into six equal 250 g portions also gives 300 kcal each. Calling a 375 g portion “one serving” does not preserve that 300 kcal estimate.

Check whether the food is evenly distributed

The per-gram method assumes a representative mixture. A scoop of curry containing mostly sauce may differ from one containing several pieces of meat. Stir a mixed dish before portioning where practical. For separate components, such as rice, chicken and dressing, calculate or weigh each component separately rather than assigning the same density to the whole plate.

If a topping is added afterwards, keep its estimate separate. Including all the cheese in the batch total and then counting it again on each portion would double-count it.

Use the equal-serving tool only for equal servings

The Recipe Calorie Calculator accepts a total in kcal and a serving count. It does not measure cooked yield or recognise unequal portions. Enter 1,800 kcal and six servings for the equal-portion example; use the weight calculation above when portions differ. The full recipe-calorie guide explains how to build the ingredient total first.

Save the denominator with the recipe

Record both “1,800 kcal per batch” and “1,500 g cooked yield”. Keeping only “300 kcal per serve” hides the assumption that every serve is 250 g. Reweigh a new batch rather than assuming its water content is identical.