Recipe Scaler
Scale any recipe up or down instantly. Enter your ingredients, original serving size, and target serving size.
I use this any time I'm cooking for a crowd. Scaling a recipe for 4 up to 18 involves a lot of mental math across a dozen ingredients, one wrong multiplier and you've got a dish that's either bland or inedible. Having the scaled amounts in front of me removes the mental load entirely.
Not everything scales linearly. Cooking time doesn't double when you double a recipe. Salt, spices, and leavening agents often need less than a straight multiplication would suggest. Use scaled amounts as a starting point and taste as you go.
What scales linearly and what doesn't
Most solid ingredients, flour, sugar, vegetables, protein, butter, scale directly with the serving multiplier. Liquids generally scale linearly too. What doesn't always scale proportionally: salt and spices often need 75–80% of the calculated amount rather than 100% when scaling up significantly, since flavors concentrate and build differently at large volumes. Leavening agents (baking powder, baking soda) should be scaled more conservatively, too much leavening can make baked goods taste metallic or cause them to collapse. Cooking time does not scale, a roast that feeds 4 takes roughly the same time as one that feeds 8, though you may need a larger vessel.
Scaling baking recipes
Baking is more sensitive to scaling than cooking because it's a chemistry reaction. Small recipe variations that don't matter in a stew matter significantly in a cake. When doubling a baking recipe, consider baking in two separate pans rather than one large pan, baking time is calibrated to the depth of the batter, not the total quantity. Very large scale-ups of baking recipes often require test batches to confirm the result holds.
Unit conversions when scaling
Scaling can push measurements into awkward units, 6.75 tablespoons of something is not practical to measure. Convert to the most practical unit: 6.75 tablespoons = 6 tablespoons + 2.25 teaspoons ≈ 6 tablespoons + 2 teaspoons + a pinch. This calculator scales the number and leaves the unit as entered, round to the nearest practical measurement when executing.
Cooking for crowds, practical tips
When scaling recipes for large groups (24+ servings), consider whether multiple batches in normal-sized equipment is better than one enormous batch in oversized equipment. Consistent results are easier with familiar equipment sizes. For events, prepare components that can be assembled at serving time rather than fully cooked dishes that deteriorate when held, pasta salads, grain bowls, build-your-own stations.
Frequently asked questions
How do I scale a recipe by a fraction?
Enter the original servings and your target. The calculator handles non-integer multipliers, scaling from 4 servings to 3 servings uses a 0.75 multiplier. All quantities are multiplied by that factor.
What if a scaled amount is too small to measure?
When scaling down, very small amounts (less than 1/4 teaspoon of a spice) become impractical to measure precisely. A pinch is roughly 1/16 teaspoon. For very small amounts, use your judgment, the exact quantity matters less for spices than for leavening in baking.
Does scaling affect cooking time?
Not linearly. Doubling a recipe doesn't double cooking time. What matters is the thickness of the food and the temperature. A doubled batch of cookies bakes for the same time in the same oven, you just need more pans and more oven rotations. A larger roast may need more time based on its diameter, not its weight alone.