Volume conversion
US customary cup to Liter converter
Convert cup to L instantly, choose the displayed precision, and verify the result with the formula and reference table below.
Liter (L)
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 common in American recipes, while liters support metric scaling and larger batch totals. This page uses the US customary cup derived from eight US fluid ounces.
Kitchen ingredients may also be listed by mass. Converting cups directly to grams requires an ingredient-specific density and is not a pure volume conversion.
Reviewed August 16, 2026.
Calculation
US customary cup to Liter formula
L = cup × 0.236588
Calculations retain full precision and the result is rounded only for display.
Worked example
For 10 cup, the result is 2.365882 L. Substitute 10 cup into the formula to obtain 2.365882 L.
A numerical value expressed in liter is usually smaller than the same measurement expressed in us customary cup, because 1 cup equals 0.236588 L.
US customary cup to Liter reference table
Common values rounded to a maximum of 6 decimal places.
| US customary cup (cup) | Liter (L) |
|---|---|
| 1 cup | 0.236588 L |
| 5 cup | 1.182941 L |
| 10 cup | 2.365882 L |
| 50 cup | 11.829412 L |
| 100 cup | 23.658824 L |
Understanding the units
About US customary cup and Liter
US customary cup (cup)
One us customary cup (cup) equals 0.236588237 L, the base relationship used for this volume conversion.
Liter (L)
Liter (L) is the base unit used by Convr for volume calculations.
When this conversion is useful
US customary cup to Liter 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
How many liters are in one US cup?
One US customary cup equals approximately 0.236588 liter.
Is every kitchen cup the same volume?
No. Metric, US legal, and other recipe cup definitions can differ, so identify the source standard.
How does Convr round US customary cup to Liter 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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