Quick Answer: Cups (US) to Milliliters
One US cup is approximately 236.59 milliliters (1 cup ≈ 236.59 mL).
Conversely, 1 mL ≈ 0.004227 cup.
Formula: mL = cup × 236.5882365
Worked examples
- 0.25 cup ≈ 59.15 mL
- 0.33 cup ≈ 78.07 mL
- 0.5 cup ≈ 118.29 mL
Method and limitations
Multiply US cups by 236.5882365. The US customary cup is ½ US pint = 8 US fl oz = 16 US tbsp, exactly 236.5882365 mL. This is a volume conversion only. Calculations use full-precision constants; answers in this box are rounded for readability (≈ marks a rounded value) and the calculator shows up to 9 significant figures. This page uses the US customary cup (236.5882365 mL); a metric cup is 250 mL. Cups measure volume, so converting to grams needs the ingredient’s density.
Each factor is exact by definition, derived from exact definitions, or a documented conventional value — see the methodology and sources.
Conversion Formula
Multiply US cups by 236.5882365. The US customary cup is ½ US pint = 8 US fl oz = 16 US tbsp, exactly 236.5882365 mL. This is a volume conversion only.
Complete Guide to Cups (US) to Milliliters Conversion
What is a US cup?
The US customary cup is 8 US fluid ounces, exactly 236.5882365 mL. It differs from the 250 mL metric cup.
What is a milliliter?
The milliliter (mL) is 1/1,000 of a liter, the same as 1 cm³.
How the Conversion Works
mL = US cup × 236.5882365, exact by definition. Household cups and spoons vary, so the measuring tool is usually less precise than the factor.
Step-by-Step Conversion Guide
Follow these steps to convert cups (us) to milliliters manually:
Start with your value in cups (us)
Example: You want to convert 0.5 cup
Apply the conversion formula
Use the formula: mL = cup × 236.5882365
Calculate the result
0.5 cup = 118.2941 mL
Verify your answer
Use our calculator above to double-check your manual calculation.
Quick Mental Math Tip
1 US cup ≈ 240 mL is close enough for most recipes (US nutrition labels use 240 mL); a metric cup is 250 mL.
Common Conversions
| Cups (US) (cup) | Milliliters (mL) | Milliliters → Cups (US) |
|---|---|---|
| 0.25 cup | 59.1471 | 0.25 mL = 0.00105669 cup |
| 0.33 cup | 78.0741 | 0.33 mL = 0.00139483 cup |
| 0.5 cup | 118.294 | 0.5 mL = 0.00211338 cup |
| 0.75 cup | 177.441 | 0.75 mL = 0.00317006 cup |
| 1 cup | 236.588 | 1 mL = 0.00422675 cup |
| 1.5 cup | 354.882 | 1.5 mL = 0.00634013 cup |
| 2 cup | 473.176 | 2 mL = 0.00845351 cup |
| 3 cup | 709.765 | 3 mL = 0.0126803 cup |
| 4 cup | 946.353 | 4 mL = 0.016907 cup |
| 8 cup | 1,892.71 | 8 mL = 0.033814 cup |
Popular Cups (US) to Milliliters Conversions
Tap any value to load it into the calculator above.
When You'll Need This Conversion
US recipes with metric jugs
Measure 1½ US cups as 354.88 mL in a metric jug.
Common Mistakes to Avoid
Converting cups straight to grams
A cup of flour and a cup of sugar have different masses.
Convert to mL here, then use the ingredient’s density, or use a recipe that gives weights.
Frequently Asked Questions
Related Guides & Articles
View allHow to Convert Cups to Milliliters: Kitchen Essential Guide
Converting cups to milliliters is essential when following international recipes or using metric mea...
Kitchen Measurements: Cups, Spoons, Volume and Weight
Recipe conversions go wrong in two ways: a unit with the same name has different sizes in different ...
Want to learn more about cooking conversions?
Browse all cooking articles →People Also Convert
Related calculators users frequently visit alongside cups (us) to milliliters.
Conversion factors on this page are either exact by definition, derived from exact definitions, or conventional values in documented use. Each is listed with its source in our conversion methodology and sources, which cites the BIPM SI Brochure, NIST Special Publication 811 and the relevant IEC or national standards. Results are rounded for display only; calculations use full precision.