Recipe scaler & converter: halve, double or resize any recipe
Paste the ingredient list once, enter the original servings and target servings, and FOOGG rescales every quantity it can recognize — including common fractions and mixed numbers.
How to scale a recipe by servings
The scale factor is target servings ÷ original servings. Going from 4 servings to 8 uses a 2× factor; going from 8 to 4 uses 0.5×. FOOGG applies that factor to the leading quantity on each recognized ingredient line and keeps the rest of the line intact.
| Change | Scale factor | 1 cup becomes | 3 eggs become |
|---|---|---|---|
| 4 → 2 servings | 0.5× | 1/2 cup | 1 1/2 eggs |
| 4 → 6 servings | 1.5× | 1 1/2 cups | 4 1/2 eggs |
| 4 → 8 servings | 2× | 2 cups | 6 eggs |
| 6 → 10 servings | 1.667× | about 1 2/3 cups | 5 eggs |
What the parser recognizes
Whole numbers, decimals, common fractions, mixed numbers and common Unicode fractions at the start of a line can be scaled. Text such as “salt to taste” is intentionally preserved instead of being guessed. FOOGG also tells you how many non-empty lines it changed so you can spot anything that still needs attention.
Small amounts such as 0.01 tsp of yeast stay nonzero after scaling; FOOGG keeps decimals when an attractive fraction would noticeably change the amount. An oven temperature explicitly marked °C or °F stays unchanged rather than being treated as an ingredient. Measure tiny amounts carefully and review yeast, salt, leavening and spice changes before cooking.
Ingredients that may need judgment
Recipe arithmetic is proportional, but cooking is not always perfectly linear. Salt, strong spices, leavening, yeast, pan depth and cooking time may need manual adjustment. For baking, changing the amount of batter can also mean changing the pan; use the pan size calculator rather than multiplying bake time.
Scaling from what you have instead
If you are not starting from a serving target, use Scale by One Ingredient when one ingredient is the constraint, or Use What I Have when several pantry amounts may limit the batch.
Need to convert units too?
Scaling changes quantities but does not change units. Convert cups, milliliters, ounces, grams or temperature with the cooking measurement converter.
Recipe scaling questions
How do I halve a recipe?
Set the target servings to half the original servings, or press the Half preset. FOOGG uses a 0.5× scale factor.
How do I double a recipe?
Set the target servings to twice the original servings, or press Double. Every recognized ingredient quantity is multiplied by 2.
What do I do with half an egg?
For recipes where precision matters, whisk the egg and use the needed fraction by weight or volume.
Does cooking time double when the recipe doubles?
No. Cooking and baking time depend on geometry, food type, pan material, oven behavior and doneness cues.