How does the recipe servings scaler work?

Paste your ingredient list, set the original serving count and your target, then click Scale. The tool parses each line, detects quantities including fractions like 1/3 or 1½, multiplies them by the ratio, and displays results as clean cooking fractions.

Which fraction formats does the parser recognise?

It handles slash fractions (1/3, 3/4), Unicode vulgar fractions (½, ¼, ¾, ⅓, ⅔), whole numbers, decimals, and mixed numbers (1 1/2 or 1½). Results are rounded to the nearest common cooking fraction — eighths, thirds, and quarters — rather than long decimals.

Can I scale a recipe down as well as up?

Yes. Enter a target servings smaller than the original — for example, scaling a 12-serving cake recipe down to 3. The multiplier works in both directions.

Does my recipe text leave my device?

No. All parsing and calculation happens in your browser with JavaScript. Nothing is sent to a server.

What happens to lines without a quantity?

Lines without a recognisable number — such as "Salt to taste" or section headers like "For the sauce:" — are passed through unchanged so you do not lose any context.

食譜份數縮放器（貼上文字）

貼上食材清單並調整份數，自動解析 1/3 杯等分數，結果以常見廚房分數顯示，不輸出長串小數。

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Ingredient list

Original servings

→

Target servings

Paste ingredients above and click Scale to begin.

How to use

Paste your recipe's ingredient list into the text area — one ingredient per line.
Set Original servings to the yield the recipe makes, then set Target servings to how many you want.
Click Scale recipe. Every quantity is multiplied by the ratio and displayed as a clean cooking fraction (e.g. 2/3 instead of 0.6667).

Tips

Works with common paste-from-recipe formats: "2 cups flour", "1/3 cup sugar", "1½ tsp vanilla".
Lines without numbers (e.g. "Salt to taste", section headers) pass through unchanged.
You can use decimal servings — e.g. scale from 4 to 1.5 for a smaller batch.

Related cooking tools

Recipe Scaler — row-by-row ingredient entry with unit selector
Cooking Unit Converter — convert cups to ml, grams, and more
Shopping List Generator — extract a printable shopping list from a recipe
Recipe Calorie Calculator — add calorie counts alongside your ingredients

常見問題

How does the recipe servings scaler work?: Paste your ingredient list, set the original serving count and your target, then click Scale. The tool parses each line, detects quantities including fractions like 1/3 or 1½, multiplies them by the ratio, and displays results as clean cooking fractions.
Which fraction formats does the parser recognise?: It handles slash fractions (1/3, 3/4), Unicode vulgar fractions (½, ¼, ¾, ⅓, ⅔), whole numbers, decimals, and mixed numbers (1 1/2 or 1½). Results are rounded to the nearest common cooking fraction — eighths, thirds, and quarters — rather than long decimals.
Can I scale a recipe down as well as up?: Yes. Enter a target servings smaller than the original — for example, scaling a 12-serving cake recipe down to 3. The multiplier works in both directions.
Does my recipe text leave my device?: No. All parsing and calculation happens in your browser with JavaScript. Nothing is sent to a server.
What happens to lines without a quantity?: Lines without a recognisable number — such as "Salt to taste" or section headers like "For the sauce:" — are passed through unchanged so you do not lose any context.

Last updated: 2026-05-20 By jarvisbox