Scaling recipes seems straightforward — just multiply or divide all ingredients, right? While that works for most ingredients, there are important exceptions that can make or break your dish. Here is how to scale recipes correctly every time.
The Basic Math
To scale a recipe, calculate your scaling factor:
Scaling Factor = Desired Servings ÷ Original Servings
If a recipe serves 4 and you need to serve 6: Scaling Factor = 6 ÷ 4 = 1.5
Multiply every ingredient by 1.5. Our Recipe Scaler does this instantly for any number of servings.
Ingredients That DON'T Scale Linearly
Spices and Seasonings When doubling a recipe, start with 1.5× the spices. When tripling, start with 2×. You can always add more, but you cannot remove it. This is especially important for: - Hot peppers and chili powder - Strong herbs (rosemary, sage, thyme) - Salt - Garlic (use about 1.5× when doubling)
Leavening Agents Baking powder and baking soda don't always scale linearly in baking: - Doubling: Use 1.75× the leavening - Tripling: Use 2.5× the leavening - Too much leavening can cause baked goods to rise too fast and collapse
Fats for Sautéing You don't need to scale cooking fats proportionally. Use enough to coat the pan, regardless of how much food you are cooking.
Adjusting Cooking Times
Stovetop Recipes - Cooking time may increase slightly for larger volumes - Liquids take longer to boil in larger quantities - Stir more frequently with larger batches
Baked Goods - Same size pan, more batter = longer cooking time - Larger pan with same depth of batter = similar cooking time - Check 5-10 minutes before the original time when scaling down
Slow Cooker / Oven - Doubling meat doesn't double the time - Use a meat thermometer for accuracy - Add 25-50% more time for doubled recipes
Pan Size Adjustments
When scaling baking recipes, adjust pan sizes to keep the batter at the same depth: - 1× recipe → 8" pan - 1.5× recipe → 9" pan - 2× recipe → Two 8" pans or one 13×9" pan
Practical Tips
- Write it down — Calculate all scaled measurements before you start cooking
- Use weight, not volume — Weighing ingredients in grams is more accurate than measuring cups
- Use our Cooking Unit Converter to switch between measurement systems
- Taste as you go — Especially important for scaled seasonings
- Keep notes — Write down what worked so you have the scaled version for next time
Take the math out of recipe scaling with our Recipe Scaler — just enter the original servings, desired servings, and it calculates everything for you.