How it works
Scale one ingredient in direct proportion to servings. Cooking time and temperature do not generally scale by the same factor.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Original servings | 4 | Enter a numeric value. Must be greater than zero. |
| Desired servings | 10 | Enter a numeric value. Must be greater than zero. |
| Original ingredient amount | 200 | Enter a numeric value. Use a non-negative value. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Original servings
- 4
- Desired servings
- 10
- Original ingredient amount
- 200
Complete example results
- Scaled amount
- 500
- Scale factor
- 2.5
Reading the result
Convert measurements to the same unit and use the net area to cover. Replace any package, waste or efficiency input with your product information. A quantity estimate alone does not determine installation conditions.
How do I double or halve a recipe?
Divide the desired servings by the original servings to get the scale factor. For 4 original servings, 2 servings use half the ingredient, 8 servings use twice as much and 12 servings use three times as much. Repeat the calculation for each ingredient using its original amount.
Keep the same ingredient unit
If the original ingredient is entered in grams, the output is in grams; cups remain cups. This tool scales an amount and does not convert volume to mass or infer ingredient density. Cooking temperature and time are not multiplied by the serving factor.
Compare different scenarios
Inputs held constant: Original servings: 4 · Original ingredient amount: 200.
| Desired servings | Scaled amount |
|---|---|
| 2 | 100 |
| 8 | 400 |
| 12 | 600 |
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
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.