Recipe Converter
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Scale any recipe to any number of servings instantly. Change servings and all ingredient amounts update automatically.
Ingredients
Scaled to 6 servings (1.5× recipe)
📐 Formula
New Ingredient Amount = Original Amount × (New Servings ÷ Original Servings)
How to Use the Recipe Converter
Enter the original serving size
Input how many servings the original recipe makes. This is usually stated at the top of the recipe: 'Makes 4 servings' or 'Serves 8.'
Enter your desired serving size
Input the number of servings you want to make. The calculator scales all ingredients proportionally by the ratio of desired to original servings.
Review scaled ingredient amounts
Each ingredient quantity is multiplied by the scaling factor. Fractional results are shown as decimals and common fractions — e.g. 0.75 cups = ¾ cup.
Adjust cooking times and temperatures separately
Note: cooking time and temperature do not scale linearly with ingredient quantity. A recipe doubled does not take twice as long. See the cooking guidance below.
What Scales and What Doesn't
Ingredient quantities scale proportionally — doubling a recipe doubles every ingredient. But cooking time and temperature do not scale the same way. Baking a double batch in one large pan versus two standard pans produces different results: a single large batch requires longer baking time (heat must penetrate a greater mass) and may need a slightly lower temperature to avoid over-browning the exterior before the centre is cooked. A general guide: cooking time increases approximately 25–35% when doubling, not 100%. Always test with a thermometer or toothpick rather than relying on scaled time alone.
Ingredients That Don't Scale Perfectly
Some ingredients behave non-linearly at different quantities. Salt and spices: scale cautiously — halve a recipe but don't halve the salt immediately; taste and adjust. A doubled recipe rarely needs exactly doubled seasoning because palate perception is not linear. Leavening agents (baking soda, baking powder): over-leavening a recipe produces a bitter, soapy flavour and can cause over-rising and collapse. Scale leavening by slightly less than the full multiplier for batches above 3×. Yeast: for large batches, use slightly less than proportional — excess yeast speeds fermentation unpredictably. Alcohol and vinegar: reduce slightly when scaling up to avoid overpowering acidity or alcohol flavour.
Volume to Weight: Converting Recipe Measurements
Many recipes mix volume and weight measurements. When scaling, volume measures (cups, tablespoons) work fine for most ingredients. For baking precision, convert key dry ingredients to weight. Use the Cups to Grams Converter for accurate weight equivalents across 50+ baking ingredients — then weigh rather than measure by volume for consistent results at any scale.
How to Scale a Recipe by Hand: Worked Example
A recipe serving 12 calls for 2 cups flour, 1.5 teaspoons salt, and 3 eggs. Scale it to serve 30.
Step 1 — find the scaling factor. 30 ÷ 12 = 2.5.
Step 2 — multiply every ingredient by 2.5. Flour: 2 × 2.5 = 5 cups. Salt: 1.5 × 2.5 = 3.75 teaspoons. Eggs: 3 × 2.5 = 7.5, which in practice rounds to 7 or 8 eggs depending on whether you round down for a slightly less rich result or up (using a partial egg, beaten and measured, for the remaining half) for closer fidelity to the original ratio.
Why can't every ingredient scale by the same multiplier in practice?
Linear scaling assumes every ingredient's effect on the final dish is proportional — true for flour, sugar, and most liquids, but not for leavening agents (baking soda, baking powder) or strong spices. Doubling a recipe's baking soda doesn't just double the rise; past a certain concentration it can produce a bitter, soapy taste or an overly porous texture. Most experienced bakers scale leavening agents and potent spices by roughly 75–85% of the linear factor rather than the full multiplier, adjusting to taste on the first batch.
What Else Changes When You Scale a Recipe Up or Down?
Do cooking times and temperatures scale the same way as ingredients?
No — this is the most common scaling mistake. Baking time is driven by heat penetration through the mass of the dish, which does not scale linearly with volume. Doubling a cake recipe and pouring it into one large pan typically requires roughly 20–40% more baking time, not double, and often a slightly lower oven temperature to prevent a burnt exterior before the center finishes cooking. Splitting the doubled batter across two pans of the original size instead keeps the original bake time largely unchanged.
How do you convert volume measurements to weight when scaling a recipe?
Using the same density figures as a cups-to-grams conversion (roughly 120g per cup of flour, 200g per cup of granulated sugar), a scaled 5-cup flour measurement converts to 5 × 120 = 600 grams — useful because weighing scaled quantities is more accurate than repeatedly leveling multiple cups, where small measuring errors compound with each additional cup.
What happens to pan size when a recipe is scaled?
Doubling ingredient quantities without doubling pan surface area produces a much thicker layer that cooks unevenly — dry or burnt on the outside before the center sets. The standard fix is to either use a proportionally larger pan (matching the new volume) or divide the scaled batter across multiple pans of the original size, preserving the original recipe's tested thickness and bake time.
Frequently Asked Questions
Sources & Methodology
Calculations are based on the most current publicly available data from authoritative government and industry sources: