Recipe Scaler

Scale recipes up or down for any servings

About the Calculator

Recipe scaling should not mean guesswork or wasted ingredients. This tool adjusts ingredient amounts based on the servings you want, so you can cook for two or twenty with confidence. Enter the original servings and the new target, then plug in any ingredient to see the scaled amount instantly. It is perfect for meal prep, holiday cooking, or converting family recipes to fit your household. It also helps avoid common mistakes like doubling spices too aggressively. Use it to keep flavor and texture consistent while saving time in the kitchen. Use the Recipe Scaler to get a clear result you can act on right away.

Original Servings

New Servings

Scale Factor

×1.50

Ingredient Amount

Enter any ingredient quantity to scale it

Scaled Amount

2 × 1.50

The Formula

Scaled Amount = Original Amount × (New Servings ÷ Original Servings)

How to Calculate Manually

1
Enter the original number of servings your recipe makes
2
Enter how many servings you want to make
3
Input ingredient amounts to see scaled quantities
4
The calculator will automatically multiply all amounts by the scale factor

Examples

Recipe serves 4, you need 6

Scale factor is 1.5 (multiply all ingredients by 1.5)

Recipe serves 8, you need 2

Scale factor is 0.25 (divide all ingredients by 4)

Scaling from 4 to 6 servings: 1 cup flour

1.5 cups flour

Scaling from 4 to 6 servings: ½ teaspoon salt

¾ teaspoon salt

💡 Tips

•When scaling baking recipes, be cautious with leavening agents (baking soda/powder) - they don't always scale linearly
•For best results, use weight measurements when scaling significantly
•Cooking times may need adjustment when scaling recipes - larger portions take longer
•Spices and seasonings often need less scaling - start with less and taste as you go

🎉 Fun Facts

•Not everything scales linearly: when doubling a cake recipe, you cannot just double the baking time; a doubled recipe in a larger pan needs only 1.3-1.5x the time, while the same batter split into two pans takes the same time as the original, breaking the "just multiply everything" assumption.
•The salt-does-not-double rule: professional chefs know that when you double a recipe, you only increase salt by 1.5x (not 2x) because salt's impact is not linear; doubling salt often makes food intolerably salty, which is why blind scaling fails for seasonings.
•Halving recipes breaks ovens: when you halve a casserole recipe, you should reduce oven temp by 25°F and check 25% earlier; smaller volumes cook faster and edges overcook while centers undercook if you keep original temperature and time.
•Restaurant recipes do not scale down: a restaurant recipe for 50 servings cannot simply be divided by 10 for home use; commercial ovens, mixers, and cooking vessels create different heat distribution, mixing patterns, and evaporation rates that dramatically change when scaled.
•Yeast does not scale proportionally: when doubling bread dough, you only need 1.5-1.7x the yeast, not 2x; too much yeast creates off-flavors and over-proofing, while scaling down requires slightly more yeast than math suggests to maintain rise time.