Recipe Scaler
Paste your ingredient list, set the original and new serving counts, and every amount is rescaled instantly — fractions and all. Results update as you type, and nothing is uploaded.
Your recipe stays in your browser — nothing is sent anywhere.
How to use the recipe scaler
Enter the servings the recipe is written for, then the number you actually want to make. Paste your ingredients one per line — the scaled list appears beside them as you type. Use the presets to halve (½×), double (2×), or triple (3×) without doing the math yourself.
How the scaling works. The tool divides your new serving count by the original to get a scale factor — six servings from a four-serving recipe is a factor of 1.5 — then multiplies the amount at the start of each line by it.
Fractions are handled. Whole numbers, decimals, simple fractions like 3/4, mixed numbers like 1 1/2, and symbols like ½ or ⅓ all parse, and the result is written back as a readable fraction such as 1 1/8 cups rather than a long decimal.
Non-numeric lines stay put. Anything without a leading amount — "a pinch of salt", "salt to taste" — is left exactly as written, because there is nothing to multiply.
Everything runs in your browser — the recipe you paste is never uploaded.
Common questions
How do I scale a recipe to a different number of servings? Divide the new serving count by the original to get a scale factor, then multiply every ingredient amount by it. Taking a 4-serving recipe to 6 gives 6 ÷ 4 = 1.5, so each amount goes up by half — and this tool does the whole list at once.
How do I halve or double a recipe? To halve, multiply every amount by 0.5; to double, multiply by 2. Paste your ingredients and tap the ½× or 2× preset and all the amounts, fractions included, are rewritten instantly.
Does it handle fractions like 3/4 cup or 1 1/2 cups? Yes. It reads whole numbers, decimals, simple fractions, mixed numbers, and fraction symbols, then writes the scaled result back as a friendly fraction instead of a long decimal.
What about lines like "salt to taste"? Lines without a number at the start are left exactly as written. Only the amount at the front of a line is scaled; the unit and ingredient name stay the same.
Is anything saved or uploaded? No. The tool is fully client-side — your recipe never leaves your browser and nothing is stored.