One cup is not one weight
Using the reference values, 1 US cup of all-purpose flour is about 120 g, while 1 US cup of granulated white sugar is about 198 g. The container’s volume is the same; the ingredients have different bulk densities.
Convert a measurement
Decimals, fractions, and mixed numbers work: 0.5, 1/2, 1 1/2, or ½.
Reference: 120 g per US cup; density ≈ 0.5072 g/mL. Ingredient preparation affects the result.
Your conversion
1 US cup
≈ 120
Gram (g) of all-purpose flour
Volume-to-weight results are estimates based on the selected density. Display rounded to 4 decimal places.
Also equal to
| Unit | Amount |
|---|---|
| US cup | 1 |
| Metric cup (250 mL) | 0.9464 |
| US tablespoon | 16 |
| US teaspoon | 48 |
| Milliliter (mL) | 236.5882 |
| Ounce by weight (oz) | 4.2329 |
US cup = 236.5882365 mL. Metric cup = 250 mL. US tablespoon = 3 US teaspoons; metric tablespoon = 15 mL. Australian 20 mL tablespoons and imperial measures are not included. An ounce by weight is different from a fluid ounce.
All conversion calculations happen in your browser. Ingredient values are an attributed factual reference, not a complete food database.
How to use the Cooking Unit Converter
- 01
Enter an amount as a whole number, decimal, or fraction, then choose its current unit.
- 02
Select the result unit. If you cross between volume and weight, choose an ingredient or enter its density in grams per milliliter.
- 03
Check the measurement convention and copy the result. Swap units to use the converted amount as your next input.
Examples
Convert without ingredient assumptions
3 US teaspoons equal 1 US tablespoon. No density is needed because both units measure volume. Likewise, 16 ounces by weight equal 1 pound.
Bring your own measured density
If 250 mL of your ingredient weighs 150 g, divide 150 by 250 to get 0.6 g/mL. Choose Custom density and enter 0.6. The tool will then estimate 2 metric cups as 300 g.
US and metric measures are explicit
A US customary cup is 236.5882365 mL, with 16 US tablespoons or 48 US teaspoons in a cup. This tool also offers a 250 mL metric cup, a 15 mL metric tablespoon, and a 5 mL metric teaspoon as separate choices. A recipe’s “cup” may follow a different convention, including a rounded 240 mL cup, so check its author’s measurements before converting.
How cups become grams
Volume converts to mass with grams = milliliters × density in g/mL. In the other direction, milliliters = grams ÷ density. The small ingredient reference set uses King Arthur Baking’s published weights for flour, sugars, butter, cocoa, vegetable oil, and honey, interpreted per US customary cup. Smaller source portions are scaled to a cup. Water uses an approximate density of 1 g/mL.
Packing and preparation change a cup’s weight
Sifted flour, a scooped cup, and a gently filled cup can have different weights. Brown sugar in this reference is packed. Ingredient values are practical estimates, not universal physical constants. Prefer the gram amount provided by the recipe author or weigh a known volume of your own ingredient for a custom density.
What to know
- The ingredient list is a small reference set. Brand, temperature, packing, and preparation can change actual density.
- Metric cup means 250 mL here. Imperial units and the Australian 20 mL tablespoon are not offered.
Common questions
Are ounces and fluid ounces interchangeable?
No. An ounce by weight measures mass; a US fluid ounce measures volume. This tool lists them separately and requires ingredient density when converting between them.
Why does a metric cup give a different gram amount?
The selected metric cup holds 250 mL, more than a 236.5882365 mL US customary cup. At the same density, its contents weigh about 5.67% more.
Can I use an Australian tablespoon or imperial cup?
Those units are not included. The metric tablespoon offered here is 15 mL; an Australian tablespoon is often 20 mL. Use a milliliter amount when your recipe specifies another convention.
Does the ingredient matter for grams to ounces?
No. Both are mass units. Ingredient selection is only needed when one side is volume and the other is weight.