Recipe Scaler

How it is calculated

Scaling a recipe means multiplying every ingredient by one factor: new amount = amount × target servings / original servings. The factor is the target divided by the original, so going from 4 servings to 6 gives 6 / 4 = 1.5. Enter the original servings, the servings you want, and one ingredient amount; the tool returns the scaled amount in the same unit and rounded to two decimals. Both servings numbers must be above zero. Run the tool once per ingredient, using the same two serving numbers each time. The result is a straight proportion, and in cooking some things do not scale in a straight line, such as salt and strong spices, cooking times, pan sizes and raising agents, so taste and adjust.

Common mistakes

• Typing the target servings in the original field, which inverts the factor and shrinks the recipe when you want to grow it.
• Mixing units in one go, like cups for one ingredient and grams for another; the tool keeps whatever unit you typed.
• Scaling salt, spices and baking powder in a straight line for a big batch. These often need less than the full proportion.
• Keeping the same pan size and baking time. A larger batch usually needs a bigger pan and different timing.