Recipe Scaling Calculator
Adjust every ingredient when you need more or fewer servings. Add your recipe amounts and the scaled quantities update instantly.
Serving size
Ingredients
Kitchen tip
Most ingredients scale directly, but salt, spices, leavening and cooking time may need a smaller adjustment. Taste as you go and use weight measurements when precision matters.
How recipe scaling works
The calculator divides desired servings by original servings to find a multiplier. Each ingredient amount is then multiplied by that factor. A recipe for 4 servings scaled to 10 servings uses a 10 ÷ 4 = 2.5 multiplier.
Worked example
If the original recipe uses 2 cups of flour, 1.5 cups of milk and 2 eggs for 4 servings, scaling to 10 servings gives 5 cups of flour, 3.75 cups of milk and 5 eggs. Keep each ingredient's original unit unless you separately convert it.
Ingredients that may not scale linearly
Salt, hot spices, extracts and smoke flavor can become overpowering when multiplied directly. Baking powder, baking soda and yeast may depend on flour weight, acidity, proofing time and pan size. For eggs or packaged ingredients that produce awkward fractions, round only after considering the recipe's texture and structure.
Cooking time and food safety
A larger batch does not automatically need the same time multiplier. Pan depth, oven airflow, starting temperature and equipment capacity matter more. Use a suitable thermometer for meat, poultry and reheated foods, follow trusted food-safety guidance, and divide oversized batches when even heating is uncertain.