A US customary cup is 236.5882365 milliliters.
Cups to Liters Converter — cup to L
Convert Cup (cup) to Liter (L) using the exact conversion factor (1 cup = 0.2365882365 liter). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Cups to Liters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
A liter is one cubic decimeter.
Result = input x 0.0002365882365 / 0.001.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cups to Liters
Cup and Liter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Cup is typically associated with united States (recipes and cooking measurement), while Liter is typically associated with standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts.
Formula
liters = cups × 0.2365882365
This factor comes from each unit's defined relationship to the category's base unit: 1 cup equals 0.0002365882365 base units, and 1 liter equals 0.001 base units, so dividing one by the other gives the direct cup-to-liter factor of 0.2365882365.
Simple example
1 cup × 0.2365882365 = 0.2365882365 L
1 cup = 0.2365882365 liters.
Real-world example
10 cup × 0.2365882365 = 2.365882365 L
10 cups = 2.365882365 liters.
Conversion table
| Cup (cup) | Liter (L) |
|---|---|
| 1 cup | 0.2365882365 L |
| 5 cup | 1.182941183 L |
| 10 cup | 2.365882365 L |
| 25 cup | 5.914705912 L |
| 50 cup | 11.82941182 L |
| 100 cup | 23.65882365 L |
Reverse conversion: Liter to Cup
0.2365882365 L × 4.226752838 = 1 cup
0.2365882365 liters = 1 cup.
cups = liters × 4.22675283773
For a page dedicated to this direction, see Liter to Cup.
Cup vs. Liter
| Aspect | Cup | Liter |
|---|---|---|
| Family | US customary unit (culinary) | Non-SI metric unit accepted for use with SI |
| Typical use | US recipe and cooking measurement | Beverage, fuel, and liquid product packaging worldwide |
| Where it's used | United States (recipes and cooking measurement) | Standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts |
Understanding the Cup
Cup (cup) measures volume. The US customary cup used in cooking is defined as exactly 240 milliliters (a rounded culinary standard, not the older 236.588 mL legal cup). It is classified as a US customary unit (culinary).
Where it's used: United States (recipes and cooking measurement)
Cooking cup vs. legal US cup. US recipes commonly round the cup to 240 mL for convenience, while the precise legal US cup (used to derive fluid ounces, pints, etc.) is 236.588 mL — a small but sometimes noticeable difference in precise baking.
Uses of the Cup today
- US recipe and cooking measurement
- Nutrition labeling serving sizes
- Baking, where volume-based flour/sugar measurement is still common in the US
History of the Cup
The cup as a cooking measure grew out of household and community cookbook conventions in 19th-century America, standardizing what had been ad hoc measurements ('a teacup of flour') into a fixed volume.
The US FDA uses a rounded 240 mL 'metric cup' for nutrition labeling purposes, distinct from the slightly smaller legal/customary cup (236.588 mL, exactly 1/16 of a US gallon) used elsewhere.
Historical origin. Cup was not the invention of a single named person; it developed through the process described above.
Understanding the Liter
Liter (L) measures volume. A liter is defined as exactly one cubic decimeter (0.001 cubic meters). It is classified as a Non-SI metric unit accepted for use with SI.
Where it's used: Standard volume unit for liquids worldwide, including in the US for beverages and fuel labeling in some contexts
Uses of the Liter today
- Beverage, fuel, and liquid product packaging worldwide
- Cooking and recipe measurement in metric countries
- Laboratory and scientific volume measurement
History of the Liter
The liter was introduced with the French metric system in 1795, originally defined as the volume of one kilogram of pure water at its freezing point — tying volume, mass, and the meter together.
Between 1901 and 1964, the liter was briefly redefined as the volume of exactly one kilogram of water at its maximum density (about 4 °C), which made it very slightly larger than a cubic decimeter. It was redefined back to exactly one cubic decimeter in 1964, the definition still used today.
Historical origin. Liter was not the invention of a single named person; it developed through the process described above.
Cup — sources
- US FDA — Reference Amounts Customarily Consumed — Uses the 240 mL rounded cup for nutrition labeling.
Liter — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Current cubic-decimeter definition of the liter.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many liters are in 1 cup?
1 cup equals 0.2365882365 liters, using the exact defined conversion factor rather than an estimate.
How do I convert cup to liter?
Multiply the cup value by 0.2365882365. The converter above does this instantly to whatever precision you set.
How do I convert liter back to cup?
Use the reverse factor: 1 liter equals 4.226752838 cups. You can also use the swap control in the converter above to flip the direction instantly.
What is a cup?
Cup (cup) measures volume. The US customary cup used in cooking is defined as exactly 240 milliliters (a rounded culinary standard, not the older 236.588 mL legal cup). It is classified as a US customary unit (culinary).
What is a liter?
Liter (L) measures volume. A liter is defined as exactly one cubic decimeter (0.001 cubic meters). It is classified as a Non-SI metric unit accepted for use with SI.
Is the cup to liter conversion exact?
Yes. A liter is defined as exactly one cubic decimeter (0.001 cubic meters). That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between cooking cup vs. legal us cup?
US recipes commonly round the cup to 240 mL for convenience, while the precise legal US cup (used to derive fluid ounces, pints, etc.) is 236.588 mL — a small but sometimes noticeable difference in precise baking.
Where is the cup still used today?
United States (recipes and cooking measurement)