Recipe Conversion Calculator

Divide your desired number of servings by the recipe's original number of servings to get a scaling ratio, then multiply every ingredient quantity by that ratio. For example, scaling a 4-serving recipe to 6 servings uses a ratio of 6/4 = 1.5, so 2 cups of flour becomes 2 x 1.5 = 3 cups. This calculator does that math automatically for every ingredient you enter.

This calculator scales the quantity but keeps whatever unit you originally entered (cups, tablespoons, grams, ounces, etc.) - it doesn't convert between unit systems. If your recipe lists 'flour: 2, cups', scaling by 1.5x gives 'flour: 3, cups'. To convert between units (like cups to grams), use a dedicated tool such as our cups to grams calculator.

Set your desired servings to exactly twice your original servings (for example, original 4 and desired 8), and every ingredient quantity will be multiplied by 2. You can also directly double each quantity yourself, but using the calculator avoids arithmetic mistakes, especially with recipes that have many ingredients or fractional quantities.

Set your desired servings to half your original servings (for example, original 4 and desired 2), which applies a 0.5x scaling ratio to every ingredient. This is especially useful for ingredients measured in awkward fractions, like halving 3/4 teaspoon to 3/8 teaspoon (0.375) - the calculator handles the decimal math for you.

Scaling works reliably for most ingredients, but a few things don't scale linearly: baking times and pan sizes usually need separate adjustment (not a simple multiplication), leavening agents like baking powder or yeast can behave unpredictably at very large or small scales, and seasoning (salt, spices) is often best adjusted to taste rather than scaled exactly. Use the calculator as a strong starting point, then adjust seasoning and cook times based on the actual batch size and cookware.

Yes - it works for any recipe with a defined serving count, whether it's baking, general cooking, or meal prep. Just enter each ingredient with its quantity and unit, and the calculator scales the whole list based on your original and desired servings.

If servings aren't listed, estimate a reasonable number based on the total yield (for example, a recipe that fills one 9-inch cake pan might be treated as 8-10 servings). The scaling ratio only depends on the ratio between original and desired servings, so as long as you're consistent, the relative scaling will still be accurate even if the exact serving count is a rough estimate.

Scaled quantities are rounded to 2 decimal places for readability. For precise baking, you can round further to the nearest practical fraction (e.g. 0.33 cups is close to 1/3 cup) when actually measuring.