Recipe Conversion Calculator
Scale any recipe up or down to a different number of servings, keeping every ingredient proportional.
Scaling each ingredient in a recipe
This calculator computes a single scale factor from your original and desired servings, then applies it to whatever ingredient amount you enter — repeat the process for each ingredient in your recipe using the same scale factor to convert the entire recipe consistently.
The unit doesn't matter for the math — whether you're scaling cups, grams, tablespoons, or a count of eggs, the same proportional scale factor applies uniformly across every ingredient.
When scaling isn't perfectly linear
Most ingredients scale linearly and predictably, but a few don't behave this way in practice — leavening agents (baking soda, baking powder, yeast) and strong spices or seasonings often need smaller proportional increases than a strict linear scale-up would suggest, since their effects can compound unpredictably at larger quantities.
Cooking and baking times also don't scale linearly with quantity — doubling a recipe rarely means doubling the cook time, since factors like pan size, heat penetration, and surface area all change the relationship. Treat calculated times as a starting estimate and check for doneness rather than relying on a purely proportional time calculation.
Frequently asked questions
Does cooking time scale the same way as ingredient amounts?
No — cooking and baking times generally don't scale linearly with quantity. Use the scaled ingredient amounts as calculated, but check for doneness visually or with a thermometer rather than simply scaling the original cook time proportionally.
Should I scale spices and leavening agents the same way as other ingredients?
Not always — strong spices and leavening agents (baking soda, baking powder, yeast) can behave unpredictably at larger quantities, so many cooks scale these more conservatively than a strict proportional increase, adjusting to taste.