Recipe Scaler
Scale any recipe up or down by servings with smart rounding. Enter your ingredients with quantities and units, set the original and target serving sizes, and get perfectly scaled amounts in real time - no signup or calculations needed.
All calculations are local - no data uploaded.
| Ingredient | Original | Scaled |
|---|---|---|
| All-purpose flour | 2 2/4 cups | 1 1/4cups |
| Sugar | 1 cups | 2/4cups |
| Butter (softened) | 1 cups | 2/4cups |
| Eggs | 2 whole | 1whole |
| Vanilla extract | 1 tsp | 2/4tsp |
| Baking powder | 2 tsp | 1tsp |
| Salt | 2/4 tsp | 1/4tsp |
| Milk | 3/4 cups | 2/4cups |
| Smart rounding: ×0.50 ratio | 24 → 12 servings | |
Smart Rounding Notes
- • Countable items (eggs, cloves, cans) round to nearest whole number
- • Volume measurements (cups, tbsp, tsp) round to nearest fraction — ¼, ⅓, or ½
- • Small amounts (pinch, dash) use sensible rounding for precision
- • Weight measurements (g, oz, lb) round to nearest 5g or ¼ oz
- • Always taste and adjust seasoning after scaling — rounding is approximate
Why Use Our Recipe Scaler?
Scale any recipe up or down with smart rounding — from a single serving to a crowd, or a large batch to a smaller portion.
Scale Any Recipe Instantly
Enter your ingredients with quantities and units, set original and target servings, and get perfectly scaled amounts in real time. The smart scaling engine adjusts every ingredient proportionally based on a simple servings ratio.
20+ Unit Types with Smart Rounding
Support for volume (cups, tbsp, tsp, ml, L), weight (g, kg, oz, lb), and count (whole, clove, pinch, dash, can, package) units. Each unit type has intelligent rounding rules — whole eggs round to integers, tsp rounds to ¼ increments, grams round to nearest 5g.
Original vs Scaled Comparison
See original and scaled amounts side by side in a clear table. The scale factor is displayed prominently so you always know exactly how much your recipe has been adjusted. Quick-swap servings to reverse the direction.
Free & Private — No Signup
All calculations happen locally in your browser. Your recipes and ingredient data never leave your device. No signup, no account, no limits — scale as many recipes as you need, completely free and private.
When to Use Our Recipe Scaler
From scaling a family dinner down to two servings to multiplying a cookie recipe for a bake sale — our scaler handles it all.
Family Dinner Scaling
Found a recipe that serves 2 but cooking for a family of 6? Scale it up with accurate measurements for every ingredient. No more mental math or estimating — get precise amounts for your family meals every time.
Meal Prep & Batch Cooking
Planning to cook once and eat all week? Scale your favourite recipes to make 4 or 8 portions and save time on weekday cooking. Smart rounding ensures you buy the right amount of ingredients at the store.
Party & Event Catering
Hosting a dinner party, potluck, or holiday gathering? Scale your go-to recipes to serve 12, 20, or more guests. The clear original-vs-scaled comparison helps you adjust shopping lists and prep quantities.
Downsizing Large Recipes
Found a great recipe that makes 24 cookies but only need 6? Scale it down effortlessly. The tool handles small fractions intelligently — no more trying to divide ⅓ cup by 4 in your head.
Dietary Adjustments
Adapting recipes for smaller households or specific dietary needs? Scale down large-batch recipes to single or double servings. Perfect for singles, couples, or anyone cooking for a smaller household.
Baking at Scale
Baking recipes need precise measurements for consistent results. Use the recipe scaler to adjust cookie, cake, and bread recipes for different batch sizes while maintaining the correct ratios of flour, sugar, eggs, and leavening agents.
Understanding Recipe Scaling
Scaling a recipe means adjusting ingredient quantities to make a different number of servings while maintaining the correct proportions and flavour balance.
What Is Recipe Scaling?
Recipe scaling is the process of multiplying or dividing ingredient quantities to change the number of servings a recipe yields. The basic principle is simple: if a recipe serves 4 and you need 8, you double every ingredient. However, real-world scaling requires more consideration - some ingredients don't scale linearly (like spices and seasonings), cooking times may need adjustment, and equipment sizes may limit how much you can make at once. Our Recipe Scaler handles the math while providing smart rounding that adapts to each ingredient's unit type, so you get practical, useable measurements every time.
How Our Recipe Scaler Works
- Enter Your Recipe: Add a recipe name and list all ingredients with their quantities and units. Choose from 20+ unit types including volume (cups, ml, tsp), weight (g, oz, lb), and count (whole, clove, can).
- Set Serving Sizes: Enter the original number of servings the recipe makes and the target number of servings you want. The tool calculates a scale factor by dividing target by original.
- Review Scaled Results: Each ingredient's scaled amount is displayed with smart rounding. The original and scaled quantities are shown side by side in a clear table.
- Copy or Adjust: Copy the scaled recipe text for use in your notes or cooking app. Swap servings to reverse the scaling direction. Adjust any ingredient and see instant updates.
How Smart Rounding Works for Each Unit Type
- Countable Items (eggs, cloves, cans, packages): Round to the nearest whole number. You can't use half an egg in most recipes.
- Volume Measurements (cups, tbsp, tsp): Round to the nearest common fraction — ¼ cup, ⅓ tbsp, ½ tsp. These are the increments most measuring spoons and cups support.
- Small Amounts (pinch, dash, drop): Use fractional precision appropriate for small quantities to maintain seasoning balance.
- Weight Measurements (g, oz, lb): Round to practical increments — nearest 5 grams, ¼ ounce, or ¼ pound for accuracy without over-precision.
- Larger Volumes (L, kg): Round to 2 decimal places for precise but practical measurements.
Privacy, Security & Availability
Our Recipe Scaler runs entirely in your browser. All calculations are performed locally using JavaScript — no data is uploaded to any server, no cookies track your recipes, and no account or signup is required. Your ingredient lists, serving sizes, and scaled recipes never leave your device. The tool is 100% free to use with no limits on the number of ingredients or recipes you can scale.
Frequently Asked Questions
Everything you need to know about scaling recipes with our free tool.
A recipe scaler is a tool that adjusts ingredient quantities when you want to make a different number of servings than a recipe originally calls for. Enter your ingredients with their amounts and units, set the original and target serving sizes, and the tool calculates the scaled quantities for every ingredient using proportional math with smart rounding.
Smart rounding adapts to each ingredient's unit type. Countable items like eggs, cloves, and cans round to the nearest whole number. Volume measurements like cups, tablespoons, and teaspoons round to the nearest common fraction (¼, ⅓, or ½) that standard measuring tools support. Weight measurements like grams and ounces round to practical increments. This ensures your scaled recipe uses measurements you can actually measure with standard kitchen tools.
The Recipe Scaler supports over 20 unit types across three categories: volume (cups, tbsp, tsp, ml, L), weight (g, kg, oz, lb), and count (whole, clove, pinch, dash, piece, slice, sheet, can, package, bottle, drop). Each unit has its own rounding rules for practical, usable measurements.
Yes! You can add as many ingredients as you need with custom names, quantities, and units. Each ingredient appears in a scrollable list where you can edit or delete it. The scaled results update instantly whenever you make changes.
Yes, click the "Copy Scaled Recipe" button to copy the entire scaled recipe as formatted text including the recipe name, serving size, and all scaled ingredient amounts. Perfect for pasting into notes, shopping lists, or messaging to friends and family.
Absolutely. Enter any original and target serving sizes — if target is larger than original, the recipe scales up. If target is smaller, it scales down. You can also click the swap button to instantly reverse the scaling direction, which is useful when comparing different serving sizes.
No limits. You can add as many ingredients as you need to a single recipe, and use the tool as many times as you want. Each session starts fresh, but you can copy scaled results for future reference.
Absolutely. All calculations happen locally in your browser using JavaScript. Your recipes, ingredient lists, and serving sizes never leave your device. No signup, no account, no tracking, and no data uploads of any kind.