How it works
Scale one ingredient in direct proportion to servings. Cooking time and temperature do not generally scale by the same factor.
new amount = original amount × desired/original servings
Worked example
Show example inputs and result
Original servings: 4 · Desired servings: 10 · Original ingredient amount: 200.
- Scaled amount
- 500
- Scale factor
- 2.5
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy