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MethodologyAbout

Scale servings and ingredients

Recipe Scaler

Scale a recipe to more or fewer servings. Amounts round to the nearest 1/16.

Your numbers

Scale the recipe

Original servings and the servings you want. Fractions are fine. We round to the nearest 1/16.
servings
servings

Scale factor

1.5×4 servings → 6 servings
3 cupsFlour
1 1/8 cupSugar
3Eggs
How we got this
  1. FlourScaled by 1.5×3 cups
  2. SugarScaled by 1.5×1 1/8 cup
  3. EggsScaled by 1.5×3
What we assumed
  • Ingredient amounts scale in a straight line. Pan size, cook time, and seasoning might not.
  • Displayed fractions round to the nearest 1/16. Smaller positive amounts show as “< 1/16”.
  • This does not turn cups into ounces. Densities differ.
Technical details

Method quantity-scaling-v1.1.0Data Manual inputs / fixed rules

Discrepancy in the numbers? You can click Report incorrect result below or email hello@costanswer.com with the Method and Data lines.

Guide

Scaling servings with 1/16 rounding

CostAnswer editorialIndependent calculator publisher

Each ingredient quantity is multiplied by desired servings ÷ original servings, then rounded to the nearest 1/16. That keeps kitchen fractions usable. It will not convert cups to grams.

What does not scale linearly

Salt, yeast, and bake times are not always linear. The page scales quantities. Cook the dish, do not treat the output as a commercial formula.

Questions about this calculator

How do I double a recipe?

Set desired servings to twice the original. Amounts round to 1/16. Spices may still need tasting.

Will bake time double if I double the recipe?

Not reliably. Quantities scale; oven time and pan size often do not. Taste and check doneness.

Terms used here

Scale factor
Desired servings divided by original servings.

Practical tips

If you need metric mass, convert after scaling; this page does not know density.

Limits and caveats

Exact scaling then 1/16 rounding. Not food-safety advice.

Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.

Engine notes

Rounding, versioning, and omissions that sit beside the guide rather than repeating it.

  • One scale factor. Desired servings divided by original servings. Every ingredient is multiplied by that same factor.
  • Kitchen amounts. Whole numbers, decimals, typed fractions, and common fraction symbols all work.
  • Fractions. The scaled amount rounds to the nearest 1/16. Cups are not turned into ounces.

Calculation receipt

What each number here is

This answer is arithmetic on what you enter. No outside dataset is involved, so nothing here can go out of date.

Scaling is a ratio applied to each quantity.

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