Recipe Converter
Metric to cups, cups to grams, the whole list at once. Each ingredient is converted using its own density, because a cup of flour is 125 g and a cup of honey is 339 g — there is no single number that does both.
This changes the units, not the amounts and not the nutrition. To make more or less of something, use the Recipe Rescaler; for calories and the rest, analyse the recipe.
One ingredient
How much does a cup of something weigh? Ask here. For a whole recipe at once, use the box below.
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Your recipe
Convert to
Nothing is scaled here — every quantity is the same amount of food, written the other way. To make more or less of it, use the Recipe Rescaler.
Why there is no single cups-to-grams number
A cup is a volume and a gram is a weight, so converting between them needs to know what is in the cup. Flour settles loosely and a cup of it is about 125 g. Granulated sugar packs tighter: 200 g. Honey is denser than either and barely holds air at all: 339 g. That is a spread of nearly three to one, which is why a single conversion factor cannot be right for a whole recipe — and why this tool converts each line using that ingredient's own density, taken from the same USDA data as everything else here.
Spoons are left alone, deliberately
Metric recipes say "1 tsp vanilla" too. Turning that into 4.2 g helps nobody: nothing in a domestic kitchen can weigh it, and the spoon is a measure everyone already owns. So small spoon measures survive the conversion untouched in both directions.
Which tablespoon?
A US tablespoon is 14.8 ml, a metric one is 15 ml, and an
Australian tablespoon is 20 ml — a third larger, and enough to matter
in a leavened bake. This tool assumes US customary
measures, which is what US recipes and USDA data both use. If your recipe
is Australian, write 20 ml rather than 1 tbsp
and it will convert correctly.
An ounce and a fluid ounce are different units
They share a name and nothing else. An ounce is a weight — 28.35 g of anything at all. A fluid ounce is a volume: 29.6 ml, which weighs 29.6 g as water and about 21 g as oil. Recipes generally mean the weight for solids and the fluid ounce for liquids, and the two are converted separately here.
Rounded to what a kitchen can produce
There is no 3/8 cup measure, so cup fractions snap to the ladder that exists: eighth, quarter, third, half, two thirds, three quarters. Metric never grows a fraction, because a fraction of a gram is a rounding error with a slash in it.
Common questions
How many grams is a cup of flour?
About 125 g for plain white flour, scooped and levelled. But there is no single answer for a cup of anything: a cup of granulated sugar is 200 g, a cup of honey is 339 g and a cup of rolled oats is 81 g. Volume to weight needs the density of the specific ingredient, which is why one blanket conversion factor cannot work.
Is a tablespoon the same everywhere?
No. A US tablespoon is 14.8 ml, a UK and international metric tablespoon is 15 ml, and an Australian tablespoon is 20 ml — a third larger. This converter assumes US customary measures, which is what US recipes and USDA data both use. If your recipe is Australian, write 20 ml rather than 1 tbsp.
Why are small spoon measures left alone?
Because metric recipes say '1 tsp vanilla' too. Converting a teaspoon of vanilla to 4.2 g helps nobody — nothing in a domestic kitchen can weigh it, and the spoon is already the measure everyone owns. Spoons survive the conversion untouched in both directions.
Why is an ounce sometimes a weight and sometimes a volume?
They are different units that share a name. An ounce is a weight — 28.35 g of anything. A fluid ounce is a volume — 29.6 ml, which weighs 29.6 g of water but about 27 g of oil. Recipes usually mean the weight for solids and the fluid ounce for liquids, and this tool converts them separately.