What Is a Recipe Scaling Calculator?
A recipe scaling calculator adjusts ingredient quantities when you want to cook more or fewer servings than a recipe was written for. Instead of fiddling with fractions in your head, you enter one ingredient amount, the recipe's original yield, and your target yield — the calculator returns the new amount and the overall scale factor you can apply to every other ingredient.
How to Use It
Enter the original amount of an ingredient (in whatever unit you like — cups, grams, tablespoons), the original servings the recipe makes, and the desired servings you want to make. The result shows the scaled amount. The scale factor at the bottom is universal: multiply every ingredient in the recipe by it to convert the whole dish.
The Formula Explained
The math is a simple proportion. First find the scale factor by dividing desired servings by original servings. Then multiply each ingredient by that factor:
$$\text{New Amount} = \text{Original Amount} \times \frac{\text{Desired Servings}}{\text{Original Servings}}$$
If a recipe makes 4 servings and you want 6, the scale factor is \(6 \div 4 = 1.5\), so everything increases by 50%.
Worked Example
A cookie recipe for 4 servings calls for 2 cups of flour. You want to make 6 servings. Scale factor = \(6 \div 4 = 1.5\). New flour = \(2 \times 1.5 = 3\) cups. Apply the same 1.5× factor to sugar, butter, and eggs.
FAQ
Can I scale down a recipe? Yes — enter fewer desired servings than the original and the scale factor drops below 1.
Does this work for any unit? Yes. The ratio is unitless, so it works for cups, grams, ounces, or any measurement.
Should I scale cooking time too? Not by the same factor — pan size and depth matter more. Keep an eye on doneness rather than scaling the time linearly.
