Recipe Scaler
Scale a recipe up or down by servings. Enter the original servings, desired servings and ingredients to resize quantities with clear kitchen-friendly notes.
Scale your recipe
Use the scale factor to resize each ingredient. For best results, use weights and volumes such as grams, millilitres, teaspoons and tablespoons.
| Quantity | Unit | Ingredient | |
|---|---|---|---|
| Ingredient | Original | Scaled amount |
|---|
How the recipe scaler works
The calculator uses a scale factor. Divide the number of servings you want by the original recipe yield, then multiply every ingredient by that number.
scale factor = desired servings ÷ original servings
scaled ingredient = original ingredient × scale factorFor example, changing a 4-serving recipe to 10 servings gives a scale factor of 2.5. A 200g ingredient becomes 500g.
What to watch when scaling recipes
- Seasoning: salt, chilli and spices may need tasting rather than exact multiplication.
- Eggs: awkward egg amounts may need rounding or a beaten egg split by weight.
- Baking: raising agents, pan size and cooking time may need adjustment.
- Cups to grams: a cup measurement depends on the ingredient, because flour, sugar and milk have different densities.
Need to convert units too?
Use the cooking converter for teaspoons, tablespoons, cups, grams and millilitres.
Recipe scaling examples
| Original recipe | New servings | Scale factor | Example ingredient |
|---|---|---|---|
| 4 servings | 8 servings | 2× | 200g flour → 400g |
| 4 servings | 2 servings | 0.5× | 2 tbsp oil → 1 tbsp |
| 6 servings | 10 servings | 1.667× | 300ml milk → 500ml |
Recipe scaler FAQs
How do I double a recipe?
Use a scale factor of 2. Multiply every ingredient by 2, then check seasoning, pan size and cooking time.
How do I halve a recipe?
Use a scale factor of 0.5. This works cleanly for most grams and millilitres, but ingredients like eggs may need judgement.
Can all ingredients be scaled exactly?
No. Most ingredient quantities can be scaled mathematically, but seasoning, raising agents, cooking time and pan size may need practical adjustment.