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Recipe Scaler Online — Scale Recipe Ingredients Free

Scale recipe ingredients up or down by changing the number of servings. Enter your ingredients and get adjusted quantities instantly. 100% free, no sign-up required.

Ingredients

Free Recipe Scaler Online — Adjust Recipe Servings Instantly

OptiDrop's Recipe Scaler is a free online tool that helps you scale recipe ingredients up or down. Whether you are cooking for a large party or just need a smaller portion, simply enter the original servings, your desired servings, and your ingredient list. The tool automatically adjusts all quantities proportionally.

How Does the Recipe Scaler Work?

Enter the original number of servings your recipe makes, then add each ingredient with its quantity, unit, and name. Enter your desired number of servings and click Scale Recipe. The tool calculates a scaling factor (new servings divided by original servings) and multiplies each ingredient quantity by that factor. It preserves your original units and ingredient names.

Tips for Scaling Recipes

When scaling up baking recipes, be cautious with leavening agents like baking powder and baking soda -- they may not scale perfectly. Spices and seasonings should be scaled conservatively (use about 1.5x instead of 2x when doubling). Cooking times may need adjustment for larger or smaller batches. All calculations happen in your browser with no data uploaded anywhere.

Frequently Asked Questions

Enter the original number of servings your recipe makes, then add your ingredients with their quantities and units. Enter your desired number of servings and click Scale Recipe. The tool calculates a scaling factor and adjusts all ingredient quantities proportionally. It handles fractions, decimals, and common cooking units.
Yes. You can scale recipes both up and down. If your original recipe serves 8 and you want to serve 4, enter 8 as original servings and 4 as desired servings. The tool will halve all ingredient quantities. Similarly, you can double, triple, or scale to any exact number of servings.
The recipe scaler works with any unit you enter. Common cooking units like cups, tablespoons, teaspoons, ounces, grams, liters, and milliliters are all supported. The tool scales the numerical quantity while keeping your original unit. You can also enter items without units (like '3 eggs') and they will be scaled proportionally.
Scaling ingredients does not automatically scale cooking time. When you double a recipe, baking times may increase slightly but not double. As a general rule, check for doneness at the original time and add time as needed. For very large batches, you may need to cook in multiple batches or use larger equipment.

Last updated: June 2026