Volume / US cup → mL
Convert US customary cups to Milliliters
Measure liquid ingredients from a recipe written in US customary cups. These cups contain 236.5882365 mL, rather than the 240 mL or 250 mL cups used in other contexts.
Reverse: Milliliters to US customary cups →
How to convert US customary cups to milliliters
US customary, imperial, and metric kitchen measures can have different sizes despite similar names. Use the system printed on your recipe or container.
Use x for the value in US cup, b for the intermediate value in L, and y for the result in mL.
mL = US cup × 0.2365882365 ÷ 0.001
Worked examples
2 US cup ≈ 473.176473 mL
Step 1: (2 × 0.2365882365) ≈ 0.473176473 L.
Step 2: 0.473176473 ÷ 0.001 ≈ 473.176473 mL.4 US cup ≈ 946.352946 mL
Step 1: (4 × 0.2365882365) ≈ 0.946352946 L.
Step 2: 0.946352946 ÷ 0.001 ≈ 946.352946 mL.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About US customary cups
A US customary cup is half a US liquid pint, or exactly 236.5882365 milliliters. This is not a 240 mL nutrition-label cup or a 250 mL metric cup.
About Milliliters
A milliliter is one thousandth of a liter and equals one cubic centimeter. It measures volume, so it cannot be converted to grams without the material’s density.
Definitions and sources
Check which gallon, cup, or ounce you mean
A US liquid gallon contains 3.785411784 liters; an imperial gallon contains 4.54609 liters. This calculator labels both explicitly and does not substitute one for the other.
Our US customary cup is 236.5882365 mL. A recipe may instead use a 250 mL metric cup or a 240 mL cup. Fluid ounces measure volume, while ounces in the Weight category measure mass.
For a tank or room, calculate the volume using dimensions in the same length unit before converting its cubic units. Changing only one side’s unit will give an incorrect volume.
Check the cup or fluid-ounce convention before using a converted volume in recipe calculations.
US customary cups to milliliters reference table
| US customary cups (US cup) | Milliliters (mL) |
|---|---|
| 1 | 236.5882365 |
| 5 | 1182.9411825 |
| 10 | 2365.882365 |
| 25 | 5914.7059125 |
| 50 | 11829.411825 |
| 100 | 23658.82365 |
| 1000 | 236588.2365 |
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