Recipe Scaler

Scale a recipe ingredient up or down by servings. Enter the original amount, its serving count and your new count to get the adjusted amount.

Try it now

New amount: 3

Worked on the example above, step by step — follow along and you can do it on paper next time, no tool required.

Scaling a recipe multiplies every amount by the ratio of new servings to old servings.
Find the scaling ratio (new ÷ old servings)
6 ÷ 4 = 1.5
Multiply the ingredient amount by that ratio
2 × 1.5 = 3

How do I double a recipe?

Set new servings to twice the original — 4 to 8 doubles every amount.

Does it round to nice fractions?

It gives the exact scaled amount; round to a convenient measure as you cook.