Recipe Scaler

How to scale a recipe

Divide the desired servings by the original servings. Multiply every ingredient by that scale factor.

For spices, salt, and leavening, taste and recipe style still matter. Scaling is a strong starting point, not a guarantee.

Picking a factor, and knowing when to stop

A recipe scale factor is the new yield divided by the old one. Doubling a four-serving recipe for eight is a factor of 2; making a four-serving recipe for six is a factor of 1.5. Multiply every ingredient quantity by the factor and the arithmetic is done — but arithmetic is only the first half, because ingredients do not all behave the same way when a recipe grows.

What scales, what does not, and what needs a fraction

Scales linearly: the main ingredients whose quantity is set by the size of the batch — meat, rice, pasta, stock, canned goods, most vegetables. Scales sub-linearly: salt, strong spices, hot sauce and dried herbs. Multiplying these by the full factor usually overshoots; start at about two-thirds of the multiplied amount and adjust at the end. Needs a fraction: eggs. A factor of 1.5 asks for one and a half eggs, so weigh a beaten egg and use half, or use the smallest egg you have and reduce the liquid slightly.

Baking is a different problem

In baking, the ratios between flour, liquid, fat and leavening are structural. Doubling a cake by doubling every line usually works; tripling it often does not, because pan depth, surface area and rising time change together. If you need a much larger batch, it is generally more reliable to bake two batches of the original size than one enormous one, and to keep the temperature the same while checking earlier.

Units and pans

Convert to weight before scaling if the original uses cups, since a scaled cup of flour is a different amount depending on how it was filled. When the pan changes size, the depth changes too: a wider pan dries faster and a deeper pan needs longer. Keep the temperature, extend the time in increments, and start checking at the original time. The cooking converter handles the units and the meal cost calculator recalculates the cost of the larger batch.

Examples and assumptions last reviewed October 13, 2026. Amounts are illustrative, not current product quotes.