Cooking Measurement Converter
Convert recipe amounts between cups, tablespoons, teaspoons, millilitres and fluid ounces, or to grams for flour, sugar and butter — in your browser, no upload.
US units are the default (1 cup = 236.6 ml). Metric (250 ml cup) and Australian units are also selectable — note the Australian tablespoon is 20 ml, not 15. Pick a weight unit on either side and an ingredient appears, because a cup of flour and a cup of sugar do not weigh the same.
16
🔒 Converted in your browser — nothing is uploaded.
Cups, spoons and millilitres, US and metric
This converter changes a cooking amount from one measurement into another across the units home cooks reach for most: US cups, tablespoons, teaspoons, millilitres, and fluid ounces, plus the international kitchen units — the 250 ml metric cup, the 15 ml metric tablespoon and 5 ml teaspoon, and the 20 ml Australian tablespoon. Type a number, pick the unit you are measuring from and the unit you want, and the result updates live as you type. Use the swap button to flip the two units in one tap — handy when you realise the recipe lists the opposite of what you have. It answers everyday kitchen questions like how many tablespoons are in a cup, how many teaspoons make up a tablespoon, or how many millilitres a fluid ounce holds, so you can scale a recipe without hunting for a chart.
How the conversion works
Every unit is first converted into a single base unit, millilitres, and then out to the unit you asked for. The tool uses the exact US customary definitions — cup = 236.5882365 ml, with the fluid ounce, tablespoon and teaspoon being precisely one eighth, one sixteenth and one forty-eighth of that (29.5735295625 ml, 14.78676478125 ml and 4.92892159375 ml), and ml = 1 — alongside the exact metric factors (metric cup = 250 ml, metric tbsp = 15 ml, metric tsp = 5 ml, Australian tbsp = 20 ml). Because everything passes through one base unit, converting A → B and back B → A returns your original number, and the math is fully deterministic: the same input always gives the same output. Because those US factors are exact ratios of one another rather than separately rounded numbers, 1 US cup comes out to exactly 16 US tablespoons and 1 US tablespoon to exactly 3 US teaspoons. Values are shown to six decimal places.
Cups to grams, by ingredient
Weight is the other half of a kitchen conversion, and it is the half a volume-only chart cannot do: 250 g of flour is a little over two cups, while 250 g of sugar is a cup and a quarter. Pick grams, kilograms, ounces or pounds on either side and an ingredient list appears — all-purpose and whole wheat flour, granulated, brown and powdered sugar, butter, oil, honey, salt, rice, rolled oats, cocoa, milk and water. Each carries a density: 120 g per cup for spooned-and-levelled all-purpose flour, 200 g for granulated sugar, 227 g for butter. Those are typical figures rather than exact ones — a cup of flour scooped straight from the bag can weigh nearer 145 g — so the page says so next to the ingredient instead of presenting an approximation as a measurement. The ounce in the weight list is the avoirdupois ounce your scale shows, kept separate from the fluid ounce, which is a volume.
Frequently asked questions
How many grams is a cup of flour?
120 g for all-purpose flour spooned into the cup and levelled off — while a cup of granulated sugar is 200 g and a cup of butter is 227 g. That difference is why the converter asks which ingredient: choose grams, kilograms, ounces or pounds on either side and an ingredient list appears, covering both flours, three sugars, butter, oil, honey, salt, rice, rolled oats, cocoa, milk and water. The weights are typical rather than exact, because scooping a cup straight from the bag instead of spooning it in can add around 20% to the flour.
How many tablespoons are in a cup?
Exactly 16. The US tablespoon is defined as one sixteenth of a US cup, so the ratio is exact by definition rather than by rounding: a cup is 236.5882365 ml and a tablespoon 14.78676478125 ml.
Why is the Australian tablespoon different?
The Australian tablespoon is 20 ml, not the 15 ml used almost everywhere else — so an Australian tablespoon is 4 metric teaspoons, not 3. Picking the wrong tablespoon is a classic cause of over-measured baking, which is why this converter lists it separately.
How many teaspoons are in a tablespoon?
Three. The US teaspoon is defined as one third of a US tablespoon — 4.92892159375 ml against 14.78676478125 ml — so it divides to exactly 3, with no rounding error left over.
Is anything I type uploaded to a server?
No. The amount and units you enter never leave your device. All of the conversion math runs in your browser with JavaScript — nothing is uploaded, logged, or stored.