Need to make a recipe for more—or fewer—people? The Recipe Scaling Calculator does the math for you. Enter the original number of servings and how many you want to make, and it will automatically adjust your ingredient amounts using practical kitchen measurements.
Whether you’re doubling dinner for a crowd or cutting a recipe in half because you really don’t need 24 muffins staring at you from the counter, the calculator gives you a useful starting point without doing the fractions yourself.
How the Recipe Scaling Calculator Works
Enter the number of servings your original recipe makes and the number you want to make. Then paste in your ingredient list or enter the ingredients manually.
The Recipe Scaling Calculator scales each amount up or down and can make awkward measurements easier to use in the kitchen. You can keep measurements as entered or choose US or metric units.
Kitchen Answers
Recipe Scaling Calculator
Need to make a recipe for more — or fewer — people? Enter the original number of servings and the number you want to make. Add your ingredients, or paste the whole ingredient list, and Kitchen Answers will recalculate the quantities for you.
Put one ingredient on each line. You can review and edit the parsed ingredients before scaling.
Metric equivalents use standard kitchen conversions: 1 tsp = 5 mL, 1 tbsp = 15 mL, 1 cup = 240 mL. Volume is never converted to weight unless the ingredient is specifically known, because a cup of flour and a cup of honey do not weigh the same.
Kitchen Answers Recipe Scaling Calculator — works in your browser; nothing is sent to our server.
How do you scale a recipe?
The basic calculation is simple: divide the number of servings you want by the number of servings in the original recipe. Then multiply each ingredient by that number.
For example, suppose a recipe makes 4 servings and you want 7 servings.
The scaling factor is 7 ÷ 4 = 1.75.
That means every ingredient needs to be multiplied by 1.75.
| Original ingredient | For 7 servings |
|---|---|
| 2 cups flour | 3½ cups |
| 1 cup milk | 1¾ cups |
| ½ cup sugar | ⅞ cup |
| 4 tbsp butter | 7 tbsp |
| 2 eggs | 3½ eggs |
The arithmetic isn’t particularly difficult. The annoying part is turning the answer into measurements you can actually use. That’s where the calculator helps.
Why does the calculator make measurements easier?
Mathematically correct isn’t always kitchen-friendly.
A scaled recipe might tell you that you need 13.33 tablespoons of something. That’s accurate, but it’s not how most people want to measure an ingredient.
With Make Measurements Easier turned on, the calculator tries to present scaled amounts as practical kitchen measurements and familiar fractions where possible.
That makes the result easier to measure without changing the recipe unnecessarily.
What happens when a recipe calls for part of an egg?
Eggs are one of the awkward parts of scaling recipes.
If 2 eggs scale to 3½ eggs, don’t automatically round that to 4. That can add more liquid, fat and protein than the recipe was designed to contain.
For a partial egg, crack an additional egg into a small bowl, beat the yolk and white together, and measure the portion you need.
Kitchen Answers Tip: One large egg without the shell is roughly 3 tablespoons of beaten egg, although actual egg sizes vary. For half an egg, about 1½ tablespoons of beaten egg is a practical starting point.
For recipes that depend heavily on eggs for structure—such as custards, soufflés or very egg-rich cakes—scaling deserves more care.
Do all ingredients scale perfectly?
No. Most ingredients can be multiplied mathematically, but that doesn’t mean every part of a recipe behaves perfectly when doubled, tripled or cut in half.
Flour, sugar, milk and similar ingredients generally scale predictably.
Other ingredients may need judgement, including:
- Eggs and other whole ingredients
- Salt
- Strong spices and seasonings
- Baking powder and baking soda in very large recipe changes
- Yeast
- Ingredients added “to taste”
- Oil used only for greasing a pan
If you’re making a modest change—such as 4 servings to 6 or 8—the calculated amounts are usually a very useful starting point.
For very large changes, the cooking method itself may also need to change.
Does cooking time change when you scale a recipe?
Sometimes, but not in direct proportion to the number of servings.
Doubling a recipe does not mean you should automatically double the cooking time.
If you divide twice as much batter between two identical cake pans, for example, the baking time may remain fairly similar. Put all that batter into one much deeper pan and the baking time can change considerably.
Pan size, food thickness, oven temperature, starting temperature and the type of food all matter.
Use the scaled ingredient amounts as your starting point, but follow normal signs of doneness and use an appropriate food thermometer when temperature is important.
Can I paste a whole recipe into the calculator?
Yes. The Recipe Scaling Calculator lets you paste an ingredient list instead of entering every ingredient individually.
For the best results, put one ingredient on each line, with the amount and measurement near the beginning.
For example:
2 cups flour
1 cup milk
½ cup sugar
4 tbsp butter
2 eggs
You can also enter ingredients manually if the pasted recipe isn’t formatted in a way the calculator can recognize.
Can I scale a recipe up or down?
Yes. You can use the calculator to increase or decrease a recipe.
For example:
4 servings → 8 servings doubles the ingredients.
8 servings → 4 servings halves the ingredients.
You can also scale less convenient amounts such as:
4 servings → 7 servings
or:
12 servings → 5 servings
Those are the situations where a recipe scaling calculator becomes particularly useful because the resulting fractions are harder to work out mentally.
Can I use US and metric measurements?
Yes. The calculator supports common US and metric kitchen measurements.
You can keep measurements As Entered or choose the measurement system you prefer where conversion is supported.
One important limitation: volume and weight are not automatically interchangeable for every ingredient.
A cup of flour does not weigh the same as a cup of sugar, and neither weighs the same as a cup of butter. Accurate volume-to-weight conversion requires knowing the specific ingredient.
The calculator therefore avoids pretending that every cup has one universal gram equivalent.
Frequently Asked Questions
What if my recipe doesn’t list the number of servings?
Estimate how many portions the original recipe normally produces and enter that as the original serving number.
For baked goods, you can often use the number of cookies, muffins, cupcakes or portions instead of traditional “servings.”
Can I double a recipe with the calculator?
Yes. Enter the original servings and twice that number as the desired servings, or use the 2× quick-scale option.
Can I halve a recipe?
Yes. Enter half the original number of servings or use the ½× option.
Can I triple a recipe?
Yes. Use the 3× quick-scale option or enter three times the original serving number.
Why are some scaled measurements rounded?
Some mathematically exact amounts aren’t practical to measure with normal kitchen equipment.
The calculator can provide easier measurements while noting situations where rounding may affect the result.
Does the Recipe Scaling Calculator change cooking temperatures?
No. Scaling ingredient quantities and changing cooking temperature are different problems.
In most cases you should not change the oven temperature simply because you’ve doubled or halved a recipe. Cooking time, pan size and food thickness may need adjustment instead.
More Helpful Kitchen Tools
The Recipe Scaling Calculator is one of several Kitchen Answers tools designed to take some of the arithmetic and guesswork out of cooking.
You may also find these useful:
- Ingredient Substitute Finder — find replacements when you’re missing an ingredient.
More Kitchen Answers tools will be added as the site grows.