Free Cooking Measurement Converter
Convert cups, spoons, milliliters and weights using US, metric or Australian measures and ingredient-specific density. Use advanced options and copy or download your results. Browser-based and no signup required.
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How to use the cooking measurement converter
Convert cups, spoons, milliliters and weights using US, metric or Australian measures and ingredient-specific density. No signup required.
- Enter the amount and recipe scale multiplier, then choose US customary, metric or Australian cup and spoon measures.
- Select the source and destination units. Distinguish fluid ounces from ounces by weight.
- Choose flour, water or a custom ingredient and review grams per US customary cup as the density reference.
- Read the converted quantity, equivalent mass and equivalent volume, or swap units and copy the report.
When a kitchen converter saves a recipe
Recipes travel across countries, and their measures do not always travel well. A British baking book may list grams, an American blog may use cups, and an Australian recipe may assume a larger tablespoon. Converting by guesswork can make a cake dry or a sauce thin.
This converter helps home cooks who own a scale but not measuring cups, or the other way around. It also helps when you want to double a recipe, cut it in half or turn a cup amount into grams for a more consistent bake. Bakers who share recipes online can use it to list both volume and weight.
You can work in cups, tablespoons, teaspoons, milliliters, liters and US fluid ounces for volume, and grams, kilograms, ounces and pounds for weight.
A worked example: scaling flour from metric cups to grams
Suppose a recipe asks for 2 metric cups of all-purpose flour and you want to make one and a half batches. Enter 2 as the amount and 1.5 as the scale multiplier. Choose Metric as the cup system, cups as the source unit and grams as the destination, and keep the flour preset of 120 g per US cup.
The quantity becomes 2 times 1.5, or 3 metric cups. A metric cup is 250 mL, so the volume is 750 mL. The flour density is 120 divided by 236.588, or about 0.5072 g per mL. Multiplying 750 by 0.5072 gives about 380.41 g. The tool shows a converted amount of about 380.41 grams, an equivalent volume of 750 mL and a density of about 0.5072 g per mL.
Switch the preset to water and the same 750 mL becomes about 750 g, because water is close to 1 g per mL. That gap shows why the ingredient matters.
How the conversion works
Units of the same kind use fixed factors. A US cup is 236.588 mL, a US tablespoon about 14.787 mL and a US teaspoon about 4.929 mL. Metric and Australian cups are 250 mL, the metric tablespoon is 15 mL, the Australian tablespoon is 20 mL and both use a 5 mL teaspoon. A US fluid ounce is about 29.574 mL, an ounce of weight is about 28.350 g and a pound is 453.592 g.
For volume to weight, the tool first converts the amount to milliliters, then multiplies by density in grams per mL. For weight to volume it divides instead. You enter density as grams per US cup, whatever cup system you choose, and editing that number switches the preset to a custom ingredient.
Common mistakes to avoid
Do not mix up fluid ounces and ounces. A fluid ounce measures volume, while an ounce measures weight, and they only match closely for water-like liquids. Check which one your recipe means before converting.
Avoid using the flour figure for sugar, butter or cocoa. Each ingredient has its own weight per cup, so enter a value from a trusted chart or weigh a cup yourself. Even flour varies with how it is scooped, so treat results as close estimates and use a kitchen scale when precision matters.
Useful tips and limitations
- Volume-to-weight conversion needs density; one cup of flour does not weigh the same as one cup of water.
- A 250 mL metric cup and a US customary cup differ. Australian tablespoons are 20 mL, unlike the 15 mL metric tablespoon.
- Use the Swap units button to check a conversion in reverse, which quickly confirms you picked the right source and destination.
- Set the result decimal places to 0 or 1 for everyday cooking so the numbers match what your scale or cups can actually measure.
Common questions
Why does cups-to-grams conversion depend on the ingredient?
Cups measure volume and grams measure mass. The calculator needs ingredient density to connect them, so flour and water produce different gram amounts.
Does changing the cup system change the density reference?
No. The density field always means grams per US customary cup of approximately 236.588 mL. Selected metric or Australian cups are then converted using their volume.
Are cooking ounces the same as fluid ounces in this converter?
No. Ounces and pounds measure mass; US fluid ounces measure volume. The ingredient density is used when converting between these dimensions.
How many grams is one US cup of flour in this converter?
With the flour preset, one US customary cup equals 120 g. That is an average figure, and your own flour may weigh a little more or less depending on how it is packed.
Can I use the recipe scale multiplier to halve a recipe?
Yes. Enter 0.5 as the multiplier and every converted amount is calculated for half the original quantity. The multiplier accepts values from 0.001 to 1000.
How big is an Australian tablespoon compared with a US one?
An Australian tablespoon is 20 mL, while a US tablespoon is about 14.79 mL. One Australian tablespoon is therefore about 1.35 US tablespoons.
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