Do spices and salt scale linearly when doubling a recipe?

No. Seasonings, salt, and spices rarely scale in direct proportion. When doubling, multiply spices by about 1.5 rather than 2, taste as you cook, and add more only if needed.

How do I adjust baking times and temperatures when scaling up pan size?

Cook times do not scale with the ingredient multiplier. A larger batch needs longer to bake but not proportionally; add 10-25% more time and test for doneness with a thermometer. Keep the oven temperature the same.

Can I scale recipes with fractional measurements like 1/3 cup or 1 1/2 tbsp?

Yes. The parser reads mixed fractions (1 1/2), simple fractions (1/3), and decimals (1.5), multiplies each by the scaling factor, and simplifies the result back to the cleanest fraction or decimal.

How do I convert imperial recipe measurements to metric when scaling?

Toggle the Unit Converter to Metric. The scaler converts cups, tablespoons, and teaspoons to millilitres and ounces to grams using standard ingredient densities, then applies your scaling factor.

What is baker's percentage and how does it help scale dough recipes?

Baker's percentage expresses every ingredient as a percentage of the flour weight, with flour set to 100%. This lets you scale a dough formula to any batch size by choosing the flour weight and multiplying each percentage through.

Kitchen Scale Pro — Free Recipe Ingredient Multiplier & Scaler

Kitchen Scale Pro is a free online recipe scaler that instantly multiplies ingredient quantities for any number of servings. Paste your ingredient list, set your original and desired servings (or a custom multiply factor), and the tool converts fractions, decimals, and imperial/metric units into a clean, checkable scaled checklist you can print or share.

Built for home cooks and professionals, it handles baker's percentages, weight-versus-volume conversions, and pan-size adjustments so every batch scales accurately without ruining flavor.

Browse our free guides: the Scaling Math Guide covers baker's percentages and volume-versus-weight conversions; the Cooking Conversions Chart lists cups-to-millilitres, ingredient weights, and oven temperatures; and the Batch Cooking & Meal Prep Guide shows how to scale recipes for a week of meals.