Recipe Scaler Calculator With Smart Fractions

Use this recipe scaler calculator to paste ingredients, change original and target servings, and scale quantities with normalized kitchen fractions. Core ingredient scaling is free - go Pro for unit promotion, full-recipe scaling, and a printable shopping list.

Original servings

servings

Target servings

servings

Scale factor

1.5x

Ingredients

Scaled from 4 servings to 6 servings (1.5x).

Scaled ingredients

6 lines

Original2 cups all-purpose flour

Scaled3 cups all-purpose flour

Original1 1/2 tsp baking powder

Scaled2 1/4 teaspoons baking powder

Original1/2 tsp kosher salt

Scaled3/4 teaspoons kosher salt

Original3 tbsp olive oil

Scaled4 1/2 tablespoons olive oil

Original1 egg

Scaled1 1/2 egg

Original8 oz mushrooms, sliced

Scaled12 ounces mushrooms, sliced

Shopping listPro

Promote units, combine matching ingredients, copy the scaled recipe, and print a shopping list.

Unlock with Pro

Free to use. Pro when you need more.

One oftenoriginal Pro membership unlocks the pro features on every tool.

Free

✓Paste ingredient lines from any recipe
✓Original and target serving inputs
✓Smart mixed-number and fraction normalization
✓Scaled ingredient list for up to 12 lines
✓Inline validation for servings and quantities
✓No sign-up required

oftenoriginal Pro

$9/month

✓Everything in Recipe Scaler With Smart Fractions, unlocked
✓Scale the full pasted ingredient list
✓Promote teaspoons to tablespoons or cups
✓Promote ounces to pounds and metric units to larger units
✓Combined shopping list from matching ingredients
✓Copyable and printable recipe shopping list

Recipe Scaler With Smart Fractions — frequently asked questions

How does this recipe scaler calculator work?+

It reads each ingredient line that starts with a quantity, multiplies that quantity by your target-to-original serving ratio, then formats the result as a clean kitchen fraction.

Can it handle fractions like 1/2 cup or 1 1/2 teaspoons?+

Yes. It supports decimals, simple fractions, mixed numbers, and common unicode fractions, then normalizes scaled amounts back into readable mixed fractions.

What does Pro add to the recipe scaler?+

Pro unlocks full-recipe scaling beyond the free line limit, unit promotion for common US and metric units, combined matching ingredients, and a copyable printable shopping list.

Is my recipe uploaded anywhere?+

No. Ingredients, servings, scaled quantities, unit promotion, and shopping-list formatting are calculated entirely in your browser.

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