Recipe Scaler

A practical kitchen calculator

Recipe Scaler Calculator

Scale any recipe up or down by servings. Enter your ingredients and get practical, kitchen-friendly measurements instantly.

Your recipe stays private. All calculations happen locally in your browser.

Step 1

Set your servings

Scale factor: —
Quick scale

Step 2

Add ingredients

The simple method

How to Scale a Recipe

First, divide the number of servings you want by the number the original recipe makes. That gives you the scale factor:

desired servings ÷ original servings = scale factor

Multiply each ingredient amount by that factor. This calculator handles the math and turns many awkward decimals into measurements that are easier to use in a kitchen.

Use the result as a starting point.

Cooking time, pan size, seasoning, and leavening can need separate judgment—especially for very large or very small batches.

Worked example

Scale 4 servings to 6

  1. Find the factor6 ÷ 4 = 1.5
  2. Scale each amount1 cup × 1.5
  3. Measure the result1 1/2 cups

Common questions

Recipe Scaling FAQ

How do I halve a recipe?

Set the target servings to half the original servings, or use the Half button. Every ingredient amount will be multiplied by 0.5.

How do I double a recipe?

Set the target servings to twice the original servings, or use the Double button. Every ingredient amount will be multiplied by 2.

How do I scale a recipe from 4 servings to 6?

Divide 6 by 4 to get a scale factor of 1.5, then multiply each ingredient by 1.5. One cup becomes 1 1/2 cups.

How do I measure half an egg?

Beat one egg until evenly mixed, then measure out half by volume or weight. Keep the unused portion refrigerated and follow normal food-safety guidance.

Do cooking time and temperature scale with the recipe?

Not necessarily. A different batch size or pan can change how quickly food cooks. Keep the recipe's temperature as a starting point and check for doneness earlier or later as needed.

Can I convert cups to grams with this calculator?

Not in this version. Cups measure volume and grams measure weight, so the conversion depends on the ingredient and its density. One universal conversion cannot work accurately for every ingredient.