Volume conversion
US customary cup to Milliliter converter
Convert cup to mL instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Milliliter (mL)
Rounded for display only; calculations retain full precision.
Rounding and precision rules
- Convr calculates first and rounds the displayed result only once, at the final step.
- The default is a maximum of 6 decimal places; trailing zeros are removed.
- Very small values that would appear as zero, and values of 10¹² or more, use scientific notation.
- Display precision is not measurement uncertainty. For scientific, engineering, or regulated work, retain only the digits justified by the source measurement.
Practical context
Understanding this conversion
US cups are frequent in American recipes and serving sizes. Milliliters are easier to measure with metric jugs and scales and are common in recipes published elsewhere.
Cup definitions vary by country and context. Confirm whether a source means a US customary, US legal, metric, Imperial, or other regional cup before scaling a recipe.
Reviewed August 16, 2026.
Calculation
US customary cup to Milliliter formula
mL = cup × 236.588237
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 cup, the result is 2,365.882365 mL. Substitute 10 cup into the formula to obtain 2,365.882365 mL.
A numerical value expressed in milliliter is usually larger than the same measurement expressed in us customary cup, because 1 cup equals 236.588237 mL.
US customary cup to Milliliter reference table
Common values rounded to a maximum of 6 decimal places.
| US customary cup (cup) | Milliliter (mL) |
|---|---|
| 1 cup | 236.588237 mL |
| 5 cup | 1,182.941183 mL |
| 10 cup | 2,365.882365 mL |
| 50 cup | 11,829.411825 mL |
| 100 cup | 23,658.82365 mL |
Understanding the units
About US customary cup and Milliliter
US customary cup (cup)
One us customary cup (cup) equals 0.236588237 L, the base relationship used for this volume conversion.
Milliliter (mL)
One milliliter (mL) equals 0.001 L, the base relationship used for this volume conversion.
When this conversion is useful
US customary cup to Milliliter conversion is useful for recipes, beverage quantities, fuel volumes, laboratory measurements, and container capacities. It lets you compare the same volume or capacity across documents, tools, or standards that use different units.
Learn with Convr
Conversion guides
Metric vs Imperial Units: A Practical Comparison
Understand how metric, US customary, and Imperial units differ, where each system is used, and how to convert between them reliably.
Read guide →Everyday conversionsUS Gallons vs Imperial Gallons: What Is the Difference?
Compare US liquid gallons and Imperial gallons, understand their exact liter values, and avoid common fuel and recipe conversion errors.
Read guide →Answers at a glance
Frequently asked questions
Is one US cup exactly 240 milliliters?
A US customary cup is exactly 236.5882365 mL. Nutrition labels may use a rounded metric cup of 240 mL.
Is a US cup the same as a metric cup?
No. A metric cup is normally 250 mL, while the US customary cup used here is about 236.588 mL.
How does Convr round US customary cup to Milliliter results?
Convr keeps full numeric precision during the calculation and rounds only the displayed result. The default is a maximum of 6 decimal places, with selectable precision on this page.
Can I convert negative or decimal us customary cup values?
Yes. The converter accepts positive, negative, decimal, and scientific-notation values. Negative values are physically meaningful for some scales, such as temperature, but not for every measured quantity.
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