This recipe converter scales every ingredient to a new number of servings and converts units within the same dimension. It deliberately refuses to convert volume to weight without a density, because a cup of flour and a cup of sugar do not weigh the same.
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Volume and weight are converted only within their own dimension. No ingredient density is assumed.
Add an ingredient to scale Enter servings and at least one ingredient with a quantity.
Scaled quantity = Quantity × Target servings ÷ Original servings
Doubling four servings to eight multiplies every amount by 2. Halving works the same way, with a factor of 0.5.
Converted = Scaled quantity converted between volume units or between mass units
Volume units convert to volume units (cups to millilitres), and mass to mass (ounces to grams). Volume to mass is not attempted without a density for that specific ingredient.
A recipe for four people needs to serve six.
Every amount is multiplied by 1.5. The ingredient names and units stay the same unless you choose a different output unit.
A US recipe lists 1 cup of liquid and you prefer metric units.
One US cup becomes 236.59 mL. A metric cup of 250 mL is a different unit and is not used here.
Flour, sugar and rice have different densities, so one cup of each has a different mass. The converter only converts within a dimension and warns when the input and output units cannot be compared.
A US cup, pint and gallon are smaller than their UK counterparts. The unit names state which system is being used so a recipe is never silently rescaled with the wrong measure.
Scaled amounts are shown with up to two decimals. A tiny amount such as 0.33 of an egg is mathematically correct but may need a practical decision in the kitchen.
Divide the target servings by the original servings to get the factor, then multiply every ingredient quantity by it. The converter does this automatically as you type.
No, not automatically. That conversion needs the density of the specific ingredient. The converter will show the scaled amount in the original unit and warn that the units belong to different dimensions.
The unit list includes US cooking units and UK pints and gallons, clearly labelled. There is no single “metric cup” entry, because 250 mL cups differ from US cups.
Yes. Use the copy button for plain text or download the ingredients as a CSV file, which opens in a spreadsheet.
The calculation keeps precision internally, but kitchen quantities are easier to read with two decimals. The display rounding does not change the scaling factor.