Recipe Scaler Calculator
Scale any recipe up or down instantly. Enter original servings, desired servings, and get the exact amounts.
How to Scale a Recipe
Scaling a recipe is straightforward multiplication — but bakers often struggle with awkward fractions and forgotten ingredients. This calculator handles the math so you can focus on the cooking.
The scale factor is simply: Desired Servings ÷ Original Servings. A recipe for 4 that you need for 10: scale factor = 2.5×. Every ingredient amount gets multiplied by that factor.
What Doesn't Scale Linearly
While ingredient amounts scale proportionally, some things don't: cooking time (a larger casserole needs more time), spices and salt (scale to 75% when doubling — you can always add more), and leavening agents (baking soda/powder should scale to about 80% when doubling to avoid metallic taste).
Tips for Large Batches
When scaling above 3× the original, consider: using weight (grams) instead of volume for accuracy, mixing in batches if your bowl is too small, and adjusting oven temperature down 25°F for larger pans that need more time to cook through.
Pro bakers always use weight (grams) rather than volume (cups) because weight is consistent regardless of how densely you pack the ingredient. A cup of flour can vary by 30% depending on whether you scoop or spoon it.
