Recipe Scaler
Scale any recipe up or down. Enter the original and desired serving count and every ingredient is adjusted automatically.
Scaling tips
Scale to ~75% of the mathematical amount. Taste and adjust at the end — flavours intensify non-linearly.
Time does not scale with ingredients. Same pan = same time. Larger pan = add 10–25%. Check for doneness early.
Can't split an egg easily. Round to nearest whole egg and adjust other liquid ingredients slightly to compensate.
How to Scale a Recipe
Scaling a recipe involves a simple mathematical process: divide all ingredient amounts by the original serving count to find the "per-serving" amount, then multiply by your desired number of servings. The result is the scaling factor — the number by which all ingredient amounts are multiplied.
New amount = Original amount × Scale factor
Example: 4 servings → 10 servings
Factor = 10 ÷ 4 = 2.5
200g flour → 200 × 2.5 = 500g flour
Common scaling conversions
| Scale factor | Example: 1 cup becomes | Example: 1 tsp becomes |
|---|---|---|
| 0.5× (half) | ½ cup | ½ tsp |
| 0.75× (three-quarter) | ¾ cup | ¾ tsp |
| 1.5× (one and a half) | 1½ cups | 1½ tsp |
| 2× (double) | 2 cups | 2 tsp |
| 3× (triple) | 3 cups | 1 tbsp |
Frequently Asked Questions
Can I scale any recipe with this calculator?
Yes — any recipe can be mathematically scaled. Simply divide all ingredient amounts by the original serving count, then multiply by your desired serving count. This calculator handles the division and multiplication automatically. Note that some aspects of recipes do not scale linearly, particularly baking times, pan sizes, and spice levels.
Does baking time change when scaling a recipe?
Baking time does not scale proportionally with ingredient amounts. Doubling a recipe does not double the baking time. If you double a cake recipe and use two pans of the same size, each bakes for the same time. If you use one larger pan, you typically increase time by 10–25% and check for doneness regularly. Temperature generally stays the same.
What is the scaling factor?
The scaling factor is the ratio of your desired servings to the original serving count. For example, if the recipe serves 4 and you want it to serve 6, the factor is 6÷4 = 1.5. Every ingredient amount is multiplied by this factor. A factor greater than 1 scales up; a factor less than 1 scales down.
Do spices and seasonings scale the same way?
Spices and seasonings generally do not scale perfectly. Doubling a recipe does not always mean doubling the salt or spice — the flavour compounds interact non-linearly. A good rule of thumb is to scale spices by 75% of the mathematical factor (e.g. if the factor is 2.0, add 1.5x the spice) and taste as you cook, adjusting at the end.
How do I convert between cups and grams when scaling?
Use our Cups to Grams converter alongside the Recipe Scaler. Scale the cup amount first, then convert to grams for precise baking. Weight measurements (grams) are always more accurate than volume measurements (cups) for baking ingredients like flour and butter.