Multiplying a recipe by 3 or dividing it in half sounds simple until you hit ⅔ of an egg, a pan that's the wrong size, and a bake time that doesn't scale linearly. RecipeFix does the math and the technique adjustments in one pass. Paste any recipe, pick a multiplier (×2, ×3, ×4) or a divider (½, ⅓, ¼), and get an accurate, rewritten recipe in kitchen-friendly fractions.
Paste a recipe link, text, or photo. Choose your target servings, or pick a preset multiplier (double, triple, quadruple) or divider (half, third, quarter). RecipeFix recalculates every ingredient in fractions your measuring cups actually have (⅓, ¼, ⅛), rounds sensibly, and flags the ingredients that don't scale linearly · salt, spices, leaveners, and baking soda all get non-linear adjustments so the recipe still tastes right.
Eggs: when a divider gives you ⅔ of an egg, RecipeFix suggests beating one egg and using two-thirds by weight (or dropping a tablespoon of milk to compensate). Pan size: doubling a 9-inch cake usually means a 9×13, not two 9-inch pans · and the bake time barely changes. Salt and spice: never scale one-to-one on a triple; RecipeFix scales by ~85% to keep flavor balanced. Leaveners: baking powder and baking soda scale sub-linearly to avoid metallic aftertastes.
The arithmetic is the easy part · the equipment is what breaks. A doubled batch usually needs a wider pan rather than a deeper one, because depth changes how heat reaches the middle while surface area barely does. Two sheet pans in one oven crowd the airflow, so things steam instead of browning; rotate them, or bake in batches. Sauces and braises take noticeably longer to reduce at triple volume, since evaporation depends on surface area and not on how much is in the pot. Large batches also take longer to come up to temperature, so a stew that simmered in 20 minutes will not at 4×. RecipeFix flags the steps where this matters instead of just multiplying the numbers.
Scaling down fails in the opposite direction. The pan is now too big for the batter, so a cake bakes thin and dries out before it sets · drop to a smaller tin or a loaf pan rather than keeping the original. Spices at ⅓ scale fall below what a measuring spoon can hold accurately, which is where a halved recipe usually tastes flat. Meat and vegetables spread thin in a large pan scorch rather than brown. And eggs stop dividing cleanly, which is the single most common reason people abandon a halved recipe. RecipeFix rounds whole ingredients to whole numbers, keeps seasoning at full strength when scaling down, and tells you when the pan needs to change.
Once your recipe is multiplied or divided, launch Cook Mode. Per-step timers, per-step ingredient checklists, and quantities that match your batch · no mental math while your hands are full.
Paste the recipe into RecipeFix, set the target servings to 3× the original (e.g. from 4 to 12), and every ingredient is multiplied with kitchen-friendly fractions. Spices and leaveners are scaled sub-linearly so the flavor stays balanced.
Paste the recipe and set servings to half the original. RecipeFix converts everything into real kitchen fractions (½, ¼, ⅛), handles the odd-egg problem by suggesting a weighed portion, and adjusts the bake time and pan size when relevant.
Beat one egg in a bowl, weigh it, and use half the weight (a large egg is about 50g, so use 25g). RecipeFix flags this on any divided recipe with a suggested substitution.
Usually less than people think. Doubling a 9-inch cake into a 9×13 adds only 5–10 minutes because the surface area grows proportionally. RecipeFix suggests the right pan and adjusts the time.
Yes. Soups, stews, casseroles, sauces · anything scales. Salt and acid are dialed sub-linearly so a tripled batch doesn't taste over-seasoned.
You can, but two pans crowd the oven and restrict airflow, so food steams instead of browning. Swap the pans between racks partway through, or bake in two batches if the recipe depends on a crisp surface. A single wider pan is usually better than two of the original size, because depth affects how heat reaches the centre and surface area barely does.
Because seasoning does not scale linearly downward. At half or a third, salt and spice quantities fall below what a measuring spoon holds accurately, and the small error is a large proportion of a small amount. Keep seasoning close to full strength when scaling down and adjust at the end · under-seasoning is the most common reason a halved recipe disappoints.
Half a Recipe Calculator · Double a Recipe Calculator · How to Halve a Recipe (Guide) · Kitchen Measurement Converter
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