How do you calculate servings for a recipe?

Divide your target serving count by the original serving count to get a multiplier. For example, to scale a 4-serving recipe to 6 servings, divide 6 ÷ 4 = 1.5. Then multiply every ingredient quantity by 1.5. Our free recipe scaler does this automatically in the Servings tab.

How do you convert serving sizes?

Enter the original serving count and target serving count in the Servings tab. The tool calculates the scaling multiplier and adjusts every ingredient proportionally.

What is a recipe multiplier?

A recipe multiplier is a number applied to every ingredient quantity to scale the recipe. A 2× multiplier doubles all quantities; a 0.5× multiplier halves them. Our Standard tab offers quick buttons for common multipliers plus a custom field.

How to scale baking recipes by weight?

Paste your ingredient list, enter a multiplier, and toggle the output to decimals for precision. For constraining by a specific weight, use the Target Ingredient mode — enter your ingredient name and the gram amount you have available.

How do you double a recipe?

Click the 2× button, paste your ingredients, and hit Scale Recipe. Every quantity is doubled instantly with clean fractional output.

How do you halve a recipe?

Click the ½× button, paste your ingredients, and hit Scale Recipe. All quantities are cut in half and displayed as clean fractions.

Recipe Scaler Tool

Scale any recipe,
instantly.

Paste your ingredients below. Choose a multiplier or enter your own serving size. Get perfect results in seconds — fractions and all.

Paste your ingredients

Supports fractions (1 1/2), decimals (1.5), and Unicode fractions (½). Messy blog text is fine.

Quick multiplier

Custom multiplier

Output format

🍳 Cook Mode Keeps your screen on while cooking

Your scaled recipe will appear here.

Three steps. Zero friction.

From paste to scaled recipe in under 5 seconds. No formatting required.

Paste your ingredients

Copy any ingredient list — straight from a food blog, recipe card, or notes app. Messy formatting, mixed fractions, weird abbreviations — it handles it all.

ingredients.txt

2 cups all-purpose flour
1 1/2 tsp baking powder
1/4 cup unsalted butter, softened
3/4 cup granulated sugar
2 large eggs
1 cup whole milk

Choose your scale

Hit a quick multiplier (½×, 2×, 3×), enter a custom number like 1.75×, specify servings, or let us calculate from a single limiting ingredient.

settings

Mode: Standard
Multiplier: 2×
Output: Fractions

Get perfect results

Scaled ingredients appear instantly, formatted as clean fractions or decimals. Copy to clipboard or print a recipe card — all without creating an account.

output.txt

4 cups all-purpose flour
3 tsp baking powder
½ cup unsalted butter, softened
1½ cups granulated sugar
4 large eggs
2 cups whole milk

Built to beat every competitor.

Other tools force manual data entry, charge subscriptions, or crash on messy text. We don't.

Zero friction

Smart Paste NLP Engine

Paste raw, messy recipe text straight from any food blog. Our regex engine automatically parses quantities, units, and ingredient names — no manual formatting needed.

Precision

Smart Fraction Math

Outputs human-readable fractions (1½ cups), not ugly decimals (1.5000001). Toggle between fraction and decimal display to match your cooking style.

Flexible

3 Scaling Modes

Scale by a multiplier (2×, 0.5×), by servings (4→6 people), or by a limiting ingredient (I only have 240g flour). The math adapts to your real-world constraints.

Screen awake

Cook Mode

Activate Cook Mode to prevent your screen from dimming mid-recipe. Uses the Screen Wake Lock API — no dirty-thumb screen tapping required.

Pantry optimizer

Target Ingredient Mode

Only have 2 eggs but the recipe calls for 3? Enter the constraint and we recalculate everything else proportionally using the x_new = x_old × (S_target / S_original) formula.

Instant export

Copy & Print

One-click copy your scaled ingredient list to clipboard, or print a clean recipe card. No account, no email, no nonsense.

Common questions.

: While often used interchangeably, a recipe multiplier strictly multiplies ingredients by a specific number (e.g., 2× or 0.5×). A recipe scaler is more versatile, allowing you to input your original and desired servings (e.g., scale from 4 to 6 servings) or target a specific ingredient amount, automatically calculating the exact multiplier needed. Our tool functions as both.
: Yes! You can scale baking recipes, cooking recipes, cocktails, and more. Our parser handles a wide variety of formats, ingredients, and measurements (both imperial and metric). It works particularly well for complex baking recipes that require precise adjustments.
: Simply paste your ingredient list into the text area. Then, either select a quick multiplier (like ½× or 2×), enter your original and target servings, or specify a target amount for a single ingredient. Click 'Scale Recipe' and all quantities will be instantly adjusted.
: When scaling up for meal prep, most ingredients scale perfectly. However, be cautious with strong spices, salt, and leavening agents (like baking soda or powder), as they sometimes require a slightly lower ratio when scaled up significantly. Our tool provides the exact mathematical scaling, but always taste and adjust seasonings as you cook.
: Scaling changes the amount of food you're making (e.g., making 8 cookies instead of 4), altering the ingredient quantities proportionally. Converting units changes the measurement type without changing the recipe size (e.g., changing 1 cup of flour to 120 grams). Our tool focuses on scaling quantities based on your desired servings or multipliers.
: Yes! Once you've scaled your recipe, simply click the 'Print' button below the results. We've optimized the layout to create a clean, printer-friendly recipe card that's easy to read on paper or save as a PDF.
: Absolutely. Our tool handles large multipliers and fractional math cleanly, making it perfect for scaling a 4-serving recipe up to 50 or 100 servings. You can use the Servings tab to calculate the exact ratio needed for your event size.
: Use the Servings tab to enter the original recipe servings (e.g., 8) and set your target servings to 1. Alternatively, you can use the ¼× or ½× quick multiplier buttons. Our tool will do the precise fraction math (like converting 1 cup to ¼ cup or 3 eggs to ¾ of an egg) so you get exact portions for a single meal.
: To scale a recipe to a different number of servings, divide your target serving count by the original serving count to get a multiplier. For example, to scale a 4-serving recipe to 6 servings, divide 6 ÷ 4 = 1.5. Then multiply every ingredient quantity by 1.5. Our scaler does this automatically — just enter your original and target servings.
: Enter the original serving count and your desired serving count in the Servings tab. The tool calculates the exact multiplier and scales every ingredient proportionally. If you have a constraint (e.g. only 2 eggs when the recipe calls for 3), use the Target Ingredient tab instead.
: A recipe multiplier is a number you multiply every ingredient quantity by to scale the recipe. A 2× multiplier doubles all quantities. A 0.5× multiplier halves them. Our Standard tab gives you quick-access buttons for common multipliers (¼×, ½×, ¾×, 1×, 1½×, 2×, 3×, 4×) plus a custom field for precise values like 1.75×.
: Baking is chemistry, so precision matters. For best results with baking recipes, paste your ingredient list and use a precise multiplier. Our tool handles fractional math cleanly, outputting results like '1½ cups' instead of '1.5000001 cups'. For professional precision, weigh your ingredients — if you know the gram weight, use the Target Ingredient mode to constrain by a specific gram amount.
: Click the 2× button in the Standard tab, paste your ingredients, and hit Scale Recipe. Every quantity is doubled instantly. The tool handles tricky cases like '1½ cups' → '3 cups' and '3 large eggs' → '6 large eggs'.
: Click the ½× button, paste your ingredients, and hit Scale Recipe. '2 cups flour' becomes '1 cup flour'. '3 eggs' becomes '1½ eggs' (or 1.5 if you prefer decimals). Use the Fraction/Decimal toggle to choose your preferred output format.
: Yes. The parser recognizes grams (g), kilograms (kg), milliliters (ml), and liters (l) alongside all standard US measurements. Paste metric or imperial — it works either way.
: 100% free. No account, no email, no subscription. The entire calculator runs in your browser. We make revenue through display advertising — the tool will always remain free to use.

The complete guide to scaling recipes.

What is a recipe scaler?

A recipe scaler is a tool that multiplies or divides every ingredient in a recipe by a factor you specify. Instead of manually recalculating "what is 3/4 of 1½ cups?" for every line of a recipe, a scaler does the arithmetic instantly and outputs the result in clean, readable form.

Our free recipe scaler handles every edge case: mixed fractions (1 1/2 cups), Unicode fractions (½ cup), decimals (1.5 oz), and plain integers (3 eggs). It parses raw ingredient text without requiring any manual formatting — just paste and scale.

How to double a recipe

To double a recipe, multiply every ingredient quantity by 2. So "1½ cups flour" becomes "3 cups flour," "2 large eggs" becomes "4 large eggs," and "¾ teaspoon salt" becomes "1½ teaspoons salt."

The only exception is cooking time and temperature — these don't scale linearly. A doubled cake doesn't bake in double the time. Always check a recipe's visual doneness cues rather than relying solely on scaled timing.

How to halve a recipe

Halving a recipe means multiplying every ingredient by 0.5 (or dividing by 2). "2 cups milk" becomes "1 cup milk." "3 eggs" becomes "1½ eggs" — in practice, you would use 1 large egg plus 1 tablespoon of beaten egg, or a medium egg.

Halving baking recipes requires particular attention to leavening agents. If you halve a recipe with 1 teaspoon of baking powder, the result is ½ teaspoon — not the rounded "a pinch." Use our fraction output mode for precision.

Scale baking recipes by weight

Volume measurements (cups, tablespoons) introduce error in baking because ingredient density varies dramatically. A cup of loosely spooned flour weighs around 120–130 grams; a packed cup can weigh 160+ grams. For professional baking precision, weigh all ingredients in grams.

Use our Target Ingredient mode to scale by a specific gram weight. If a recipe calls for 200g flour and you only have 150g, enter "flour" and "150g" — we recalculate the entire recipe proportionally: x_new = x_old × (150 ÷ 200).

Scaling for servings

To convert a recipe from 4 servings to 6, calculate the multiplier: 6 ÷ 4 = 1.5. Then scale every ingredient by 1.5. Our Servings tab does this automatically — enter your original and target serving count and we handle the math.

For large batch cooking — scaling a dinner recipe from 4 to 20 servings — pay attention to salt, spices, and aromatics. These often don't scale linearly; many experienced cooks recommend scaling salt and spices to about 60–80% of the mathematical result and adjusting to taste.

Fractional math in cooking

American home cooking recipes rely heavily on fractions: ¼ cup, ½ teaspoon, ⅓ cup. When scaled, these can produce awkward results. A 1.75× multiplier applied to "⅓ cup" yields 0.583 cups — which is neither a standard fraction nor intuitive.

Our scaler automatically finds the nearest clean fraction (in this case, ½ cup + 1 tablespoon, or simply rounding to ⅔ cup depending on precision required). Toggle the Decimal mode if you prefer exact numeric output for professional kitchen use.

Pro tips

Eggs are tricky to halve: For 1.5 eggs, beat one egg thoroughly and use 60% of it (about 1 tablespoon + 2 teaspoons of the beaten egg).
Salt and spice scaling: When scaling up more than 2×, start spices at 75% of the calculated amount and adjust to taste.
Baking powder precision: Use level teaspoon measurements, not heaping ones. Baking reactions are sensitive to leavening ratios.
Pan size matters: Doubling a recipe often requires a larger pan or two separate pans. A doubled batter in the same pan will overflow or not bake correctly.
Cook Mode: Activate Cook Mode to prevent your phone screen from locking mid-recipe — especially useful when your hands are covered in dough.

Start scaling your recipe now.

No account. No subscription. Just paste and scale.

Scale a Recipe Learn More

Scale any recipe,instantly.

Three steps. Zero friction.

Paste your ingredients

Choose your scale

Get perfect results

Built to beat every competitor.

Smart Paste NLP Engine

Smart Fraction Math

3 Scaling Modes

Cook Mode

Target Ingredient Mode

Copy & Print

Common questions.

The complete guide to scaling recipes.

What is a recipe scaler?

How to double a recipe

How to halve a recipe

Scale baking recipes by weight

Scaling for servings

Fractional math in cooking

Start scaling your recipe now.

Scale any recipe,
instantly.