What is the Recipe Scaler?
Scale every ingredient in a recipe up or down to a new number of servings. Quick, everyday math — splitting the bill, checking a sale, comparing prices at the store or scaling a recipe — shouldn’t need a spreadsheet. These calculators answer it in a second.
How to use the Recipe Scaler
- Enter your original servings, your new servings, your ingredients.
- Results update automatically as you type; you can also press Calculate.
- Read the output: scaled recipe, scale factor.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With original servings = 4, new servings = 6, the Recipe Scaler returns scale factor: 1.500×.
Tips for better results
- Stacked discounts multiply rather than add: 30% + 20% off is 44% off, not 50%.
- Compare unit prices, not package prices, to find the real deal.
- Bookmark the tools you use often — every page works offline once loaded.
Frequently asked questions
What does the Recipe Scaler do?
Scale every ingredient in a recipe up or down to a new number of servings.
How is it calculated?
The Recipe Scaler uses this method: Each quantity × (new servings ÷ original servings).
Can you show an example?
With original servings = 4, new servings = 6, the Recipe Scaler returns scale factor: 1.500×.
Is the Recipe Scaler accurate?
Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.
Is this tool free and private?
Yes — the Recipe Scaler is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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