Recipe Scaler
Instantly scale any recipe to any number of servings. Automatically recalculates all quantities with smart handling of spices, eggs, and leavening.
4 servings
Scale factor
× 1.50
6 servings
Ingredients
| Ingredient | Quantity | Unit | Type | |
|---|---|---|---|---|
Scaled results
| Ingredient | Original | Scaled | Note |
|---|---|---|---|
| Chocolat noir | 200 g | 300 g | |
| Beurre | 100 g | 150 g | |
| Sucre | 150 g | 225 g | |
| Farine | 80 g | 120 g | |
| Œufs | 3 piece | 4.5 piece | |
| Poudre à lever | 5 g | 6.9 g | Leavening reduction applied |
| Extrait de vanille | 1 tsp | 1.3 tsp | Spice reduction applied |
| Sel | 1 pinch | 1.3 pinch | Spice reduction applied |
Recipe Scaler — Recalculate Proportions in One Click
Why use a smart recipe scaler?
Not all culinary proportions follow a simple ratio: spices overwhelm the palate when doubled, leavening agents cause collapse if over-scaled, and eggs cannot be split into thirds. A smart scaler applies the correct coefficient to each ingredient family — something no mental arithmetic can do reliably.
Speed matters when you are cooking for an event or reducing a recipe to a single serving. Instead of checking each line manually, the tool displays every adjusted quantity in real time the moment you change the serving count.
No data ever leaves your browser: your personal recipes — whether from family notebooks or professional chefs — stay completely private. You can even use the tool offline once the page has loaded.
Who uses this tool?
- Home cook
- Preparing a birthday cake for 20 from a recipe designed for 8? The scaler handles rounded eggs, reduced leavening, and adjusted spices without any manual calculation on your part.
- Student or solo diner
- Halving a family recipe meant for 6 into a single portion often leads to waste or under-seasoning. The tool calculates exact fractions, including tiny spice amounts.
- Caterer or professional chef
- Scaling a 4-portion spec sheet to an 80-cover banquet demands precision that mental math cannot deliver. The scaler provides gram-accurate quantities with the right reduction factors.
- Food blogger
- You publish recipes online and readers constantly ask for different serving sizes. Copy the scaled results in one click to update your articles or reply to comments.
How to scale a recipe step by step
Enter the original serving count and add your ingredients with their quantity, unit, and type (normal, spice, leavening, or egg).
Move the target slider to the desired number of servings: all quantities recalculate instantly using the correct coefficients.
Review warnings for rounded eggs and unit conversion suggestions, then copy the results into your notes.
Frequently asked questions about recipe scaling
- Does the tool work for baking recipes?
- Yes, and that is precisely where it proves most useful. Baking demands exact proportions: the tool automatically applies a 75% reduction on leavening agents and rounds eggs to the nearest half to prevent failures.
- Can I add ingredients that don't fit the proposed categories?
- Any ingredient can be added. Choose the 'Normal' type for standard linear scaling, or select 'Spice', 'Leavening', or 'Egg' if the ingredient requires special handling.
- Where do the reduction coefficients for spices and leavening come from?
- The 0.65 coefficient for spices is based on flavour chemistry guidelines: volatile aromatic compounds intensify faster than volume. The 0.75 coefficient for leavening follows professional baking practice to prevent excess CO₂ in the dough.
- Does the scaler handle unit conversions?
- The tool does not convert units automatically, but it displays a suggestion when the scaled quantity crosses a natural threshold (for example 1,200 g becomes roughly 1.2 kg, or 1,500 ml becomes roughly 1.5 L).
- How many ingredients can I add to a recipe?
- You can add up to 30 ingredients per recipe. This is more than enough for most dishes, including elaborate baking or world-cuisine recipes with many spices.
Tool created on March 16, 2026