About the Serving Size Calculator
Portion size per person from a total quantity, or the total needed for a group.
Also known as: portion calculator, how much per person, servings calculator, portion size per person.
How to use this calculator
- Enter calculate, number of people, extra allowance and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
total = people × per-person portion × (1 + allowance)
Worked example
Using the values pre-filled in the calculator above:
- Calculate: Total needed
- Number of people = 8
- Amount per person = 180 g
- Extra allowance = 10 %
the calculator returns:
- Total needed: 1,584 g
- In kilograms: 1.584
- In pounds: 3.49
- Per person: 180 g