Does this adjust salt or leavening differently than other ingredients?

No — every ingredient scales by the identical ratio; adjust these manually for very large batches.

Will my bake time also scale by the same factor?

No — pan size and bake time don't scale linearly with ingredient quantities.

Can I scale a recipe down as well as up?

Yes — enter a smaller target-servings number.

What if my scaled amount doesn't round to a clean fraction?

It falls back to displaying a decimal.

Does this work for non-baking recipes too?

Yes — the linear scaling math applies to any recipe.

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Math & Everyday

Recipe Scaler

Scale a recipe's ingredients up or down, rounded to clean kitchen fractions.

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About the Recipe Scaler

Scales every ingredient in a recipe up or down by a target servings ratio, rounding each scaled quantity to the nearest common kitchen fraction (1/8, 1/4, 1/3, 1/2, 2/3, 3/4, etc.) instead of an awkward decimal a measuring cup can't actually measure.

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How to use it

Enter how many servings the original recipe makes, and how many you want to scale it to.
Enter each ingredient's name, quantity, and unit — add or remove rows as needed.
Read the scaled quantity for each ingredient.

Formula

Scale factor = target servings ÷ original servings. Scaled quantity = original quantity × scale factor, then rounded to the nearest common fraction.

Worked example

A recipe for 4 that uses 2 cups flour, scaled to serve 6 (a 1.5× factor): flour becomes 3 cups exactly.

Interpreting your result

This scales every ingredient by the same linear ratio. It doesn't adjust for ingredients that don't scale linearly — leavening agents, salt, and spices often need proportionally less at large scale-ups. Pan size/bake time almost never scale linearly either.

Recommendations

• Salt, leavening, and spices often taste 'too strong' if scaled up by the same large factor — many bakers scale these slightly less for big batches.
• Doubling or tripling a recipe rarely means doubling the bake time.
• For a very large scale factor, consider whether your pan/oven can actually accommodate the volume.

Frequently asked questions

Because that's what real measuring cups and spoons can actually measure.