Recipe Scaler - Double, Halve, or Adjust Recipe Servings

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Scaling Tips

About This Tool

This recipe scaler is a free tool that adjusts ingredient quantities when cooking for more or fewer people than the original recipe serves. Enter your original serving size and desired serving size, add your ingredients, and the tool calculates scaled amounts automatically.

The scaler recognizes common cooking units (cups, tablespoons, teaspoons, ounces, grams) and displays results in practical measurements. Instead of showing "0.5 cups," it converts to "8 tbsp" or shows "1/2 cup." Small tablespoon amounts convert to teaspoons automatically.

You can paste a full ingredient list from any recipe and the parser will extract quantities, units, and ingredient names. All processing happens in your browser -- no data is sent to any server.

How Recipe Scaling Works

The formula behind recipe scaling is a simple ratio:

Scaled Amount = Original Amount x (Desired Servings / Original Servings)

If a recipe serves 4 and you need 6 servings, the scale factor is 6 / 4 = 1.5. Every ingredient gets multiplied by 1.5. Two cups of flour becomes 3 cups. One teaspoon of salt becomes 1 1/2 teaspoons.

This works for most ingredients. Seasonings, leavening agents, and cooking times are exceptions -- see the tips section above and the full recipe scaling guide for details.

Quick Measurement Reference

Common conversions you'll need when scaling creates awkward quantities:

• 1 tablespoon = 3 teaspoons
• 1 cup = 16 tablespoons = 48 teaspoons
• 1 cup = 8 fluid ounces = ~240 ml
• 1/2 tablespoon = 1 1/2 teaspoons
• 1/3 cup = 5 tablespoons + 1 teaspoon
• 1/4 cup = 4 tablespoons
• 1 stick butter = 1/2 cup = 8 tablespoons = ~113 g

Frequently Asked Questions

How do I double a recipe?

Multiply every ingredient quantity by 2. For seasonings and spices, start with 1.5x and adjust to taste -- flavors tend to intensify in larger batches. For leavening agents like baking powder or baking soda, use 1.5x to 1.75x instead of a full 2x. Keep oven temperature the same but expect slightly longer cooking time.

How do I halve a recipe?

Divide every ingredient by 2. For eggs, beat one whole egg and use about 1 1/2 tablespoons (half). Reduce baking time slightly and check for doneness a few minutes early. Seasonings can usually be halved directly.

Do seasonings scale linearly?

Not always. Salt, pepper, garlic, and strong spices intensify in larger batches. When doubling or more, start with 1.5x the seasoning and adjust to taste. Scaling down is more forgiving -- use the direct ratio.

Does cooking time change when I scale a recipe?

Cooking time does not scale proportionally. A doubled recipe might need 10-20% more time, not double. Always check for doneness using a thermometer (meats) or visual/touch tests (baking) rather than time alone.

Should I use weight or volume when scaling?

Weight measurements (grams, ounces) are more accurate, especially for baking. A cup of flour can weigh anywhere from 120g to 160g depending on how it's scooped. If precision matters, use a kitchen scale.

How do I handle half an egg?

Beat the egg thoroughly with a fork, then measure out about 1 1/2 tablespoons. Alternatively, use the whole egg and reduce other liquids by about 1 1/2 tablespoons to compensate.

Can I triple or quadruple a recipe?

Yes, but larger scale factors require more care. Leavening and seasoning need greater adjustment at 3x or above. For baking, making multiple standard batches is often more reliable than one very large batch.

Does this tool store my data?

No. All calculations happen in your browser using JavaScript. No ingredient data is sent to any server.

Related Tools

• Cooking Measurement Converter -- convert between cups, tablespoons, ounces, grams, and more
• Percentage Calculator -- calculate percentages for any recipe adjustment
• Ratio Calculator -- find and apply ratios for ingredient proportions
• How to Scale a Recipe (Guide) -- detailed guide to doubling, halving, and adjusting recipes

Recipe Scaler FAQ