How to use the Recipe Serving Size Calculator.
Serving-size scaling multiplies ingredient quantities by a stated factor. Cooking time, pan size and seasoning may need separate adjustment, so do not scale those mechanically.
Make the workflow fit your task.
Calculate the target-to-original serving ratio and apply it to ingredient quantities with consistent units. Keep awkward fractions visible or explain practical rounding. Review pan capacity, method and seasoning separately rather than scaling time automatically.
- What you provide
- Original quantities and desired servings.
- What you get
- Deterministically scaled ingredient list.
See the input and the result.
Illustrative input and output · a teaching example, not a live WebAct run
Example input
Recipe serves 4 and uses 200 g rice, 400 ml water and 1 onion; target is 6 servings.
Completed example
Scale factor: 6 ÷ 4 = 1.5. Rice: 300 g. Water: 600 ml. Onion: 1.5. Check the cooking method and vessel rather than multiplying cooking time by 1.5.
Load this input into the prompt, then copy it to WebAct to try the task. Your result may differ from the illustration.
Decisions and troubleshooting.
Should doubling a recipe also double its cooking time?
No. Geometry, equipment and method affect timing. Follow suitable guidance and check the food using the appropriate method.
Why does the scaled recipe require one and a half onions?
The arithmetic reflects the requested ratio. Convert to a practical measured quantity if the recipe provides a usable size or weight.
Try it with your own source.
Replace the example with your material in the task prompt. Keep the requirements you need, then copy the task into WebAct.
Customize and copy the task ↑