Enter your original serving size and desired serving size (or a custom multiplier), then paste your ingredient list — one ingredient per line with quantities at the start. The Recipe Converter calculates your scaling factor and outputs scaled quantities alongside each ingredient, so you can cook for any crowd without manual math.
Conversion Factor (CF)
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Original Servings
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Scaled Servings
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Scaled Ingredient List
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The conversion factor (CF) is simply your desired servings divided by the original servings. For example, if your recipe makes 4 servings and you need 10, the CF is 10 ÷ 4 = 2.5. Every ingredient quantity is then multiplied by this factor to give you the scaled amount.
Yes — just enter a desired serving count lower than the original. For instance, scaling a 12-serving recipe down to 3 gives a CF of 0.25, meaning every ingredient quantity is quartered. You can also choose the 'Half (½x)' preset for a quick halving.
Use the Quick Scale Preset dropdown to pick a common multiplier such as Double (2x) or Triple (3x). Selecting a preset overrides the serving-count fields and applies that multiplier directly to all ingredient quantities.
Start each line with the numeric quantity (e.g. 2, 1.5, 0.25), followed by the unit and ingredient name — for example '2 cups flour' or '1.5 tsp vanilla extract'. The converter identifies the leading number on each line and scales it; text without a leading number is left unchanged.
For best results, enter quantities as decimals (0.5 instead of ½, 0.75 instead of ¾). The tool multiplies the decimal value by the conversion factor and displays the result rounded to three decimal places. Many cooks then round to the nearest practical cooking measure.
Ingredient quantities scale proportionally for both cooking and baking. However, baking times, temperatures, and pan sizes do not scale linearly — a doubled batch may need only 10–15% more oven time. Always check doneness by touch or a toothpick rather than relying solely on the original bake time.
The converter scales the number the same way — 3 eggs at 2x becomes 6 eggs. In practice, some bakers round to the nearest whole egg for very small fractions. The tool will show the mathematically correct scaled number, and you can apply your own rounding judgment.
This tool is designed to scale ingredient quantities only. Cooking and baking times depend on factors like pan size, heat distribution, and food thickness — these do not scale with a simple multiplier. Consult recipe-specific guidance or professional culinary resources for time adjustments.