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Recipe Scaler / Multiplier

Scale any recipe up or down by a factor or by servings — quantities re-render as clean fractions.


      
About this tool
Recipe Scaler / Multiplier is a free, in-browser tool that resizes a whole ingredient list at once. Paste your ingredients one per line, choose a multiplier or a servings change, and every leading quantity is rescaled while the rest of each line stays exactly as written. Nothing is uploaded — the parsing and math run entirely on your device.
Each line's leading quantity is parsed into a decimal: whole numbers, decimals like 1.5, ASCII fractions such as "3/4" or mixed numbers like "1 1/2", and unicode fractions (½ ¼ ¾ ⅓ ⅔ ⅛ ⅜ ⅝ ⅞) are all recognized. The value is multiplied by the scale factor — for servings mode the factor is desired ÷ original — then rounded to the nearest one-eighth and rendered back as a tidy whole number or fraction, so "1 1/2 cups flour" doubled becomes "3 cups flour".
Lines with no leading number (like "salt to taste" or a section header) pass through untouched. Use the copy button to grab the rescaled list. The tool is fully deterministic: the same input and factor always produce the same output.

        
Frequently asked questions
What quantity formats does it understand?
Whole numbers, decimals (1.5), ASCII fractions and mixed numbers (3/4, 1 1/2), and unicode fractions (½, ¼, ¾, ⅓, ⅔, ⅛, ⅜, ⅝, ⅞). Only the quantity at the very start of a line is scaled; the unit and ingredient text are left unchanged.
How does servings mode compute the factor?
It divides the desired servings by the original servings. Going from 4 to 6 servings gives a factor of 1.5; going from 8 to 4 gives 0.5, which halves every quantity.
Why are results shown as eighths?
Scaled amounts are rounded to the nearest 1/8 and written as a whole number or a common kitchen fraction (like 2 1/4), because measuring spoons and cups work in those steps. Very small amounts fall back to a short decimal instead of rounding to zero.
Is my recipe uploaded anywhere?
No. The ingredient text is parsed and rescaled entirely in your browser — nothing is sent to a server, and the tool works offline.

        
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