Recipe Scaler

Divide the servings you want by the servings the recipe makes — that ratio is your scale factor. To take a 4-serving recipe to 6, the factor is 6 ÷ 4, or 1.5, so every ingredient is multiplied by 1.5. This calculator does that for each ingredient at once and rounds the result to a fraction you can measure with standard cups and spoons.

Most do — flour, sugar, liquids, and butter scale linearly with the factor. A few do not behave as cleanly. Eggs come in whole units, salt and spices are a matter of taste, and leavening agents can need a small tweak in very large or very small batches. The calculator scales every amount mathematically; use the kitchen notes above to fine-tune the tricky ones.

When scaling gives you a fraction of an egg, the simplest fix is to round to the nearest whole egg. If the recipe is sensitive — a delicate cake, for instance — crack one egg into a bowl, beat it lightly, and measure out the fraction you need. A large egg is roughly 3 tablespoons (about 50 mL) of beaten egg.

Less than people expect. Baking time depends mostly on how thick the food is, not how much of it there is. If you scale a recipe but keep the same pan depth, the time barely moves. If a larger batch makes a deeper pan of batter, add a few minutes and test for doneness. The oven temperature itself stays the same.

Scale them with everything else as a starting point, but treat the result as a guide rather than a rule. Strong seasonings — salt, garlic, chili, and bold spices — often taste stronger than a straight multiplication suggests, especially when scaling up. Add most of the scaled amount, then taste and adjust at the end.

Yes — and that is a different calculation. When you change the pan rather than the servings, you scale by the ratio of the pan areas. Our Pan Substitution Calculator works out that ratio for round, square, and rectangular pans, then you can bring the factor here to rescale the ingredients.