A US customary cup is 236.5882365 milliliters.
Cups to Quarts Converter — cup to qt
Convert Cup (cup) to Quart (qt) using the exact conversion factor (1 cup = 0.25 quart). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Cups to Quarts 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 US liquid quart is one quarter of a US gallon.
Result = input x 0.0002365882365 / 0.000946352946.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cups to Quarts
Cup and Quart 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 Quart is typically associated with united States (cooking, dairy, motor oil packaging).
Formula
quarts = cups × 0.25
This factor comes from each unit's defined relationship to the category's base unit: 1 cup equals 0.0002365882365 base units, and 1 quart equals 0.000946352946 base units, so dividing one by the other gives the direct cup-to-quart factor of 0.25.
Simple example
1 cup × 0.25 = 0.25 qt
1 cup = 0.25 quarts.
Real-world example
10 cup × 0.25 = 2.5 qt
10 cups = 2.5 quarts.
Conversion table
| Cup (cup) | Quart (qt) |
|---|---|
| 1 cup | 0.25 qt |
| 5 cup | 1.25 qt |
| 10 cup | 2.5 qt |
| 25 cup | 6.25 qt |
| 50 cup | 12.5 qt |
| 100 cup | 25 qt |
Reverse conversion: Quart to Cup
0.25 qt × 4 = 1 cup
0.25 quarts = 1 cup.
cups = quarts × 4
For a page dedicated to this direction, see Quart to Cup.
Cup vs. Quart
| Aspect | Cup | Quart |
|---|---|---|
| Family | US customary unit (culinary) | US customary unit |
| Typical use | US recipe and cooking measurement | US recipe measurement (larger liquid volumes) |
| Where it's used | United States (recipes and cooking measurement) | United States (cooking, dairy, motor oil packaging) |
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 Quart
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Where it's used: United States (cooking, dairy, motor oil packaging)
Uses of the Quart today
- US recipe measurement (larger liquid volumes)
- US motor oil and automotive fluid packaging
- US dairy and beverage packaging (quart containers)
History of the Quart
The quart ('quarter' of a gallon) follows the same English wine-gallon lineage as the US gallon, retained by the US after England moved to a different imperial standard in 1824.
Historical origin. Quart 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.
Quart — sources
- NIST Handbook 44, Appendix C — General tables of units including the US quart definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quarts are in 1 cup?
1 cup equals 0.25 quarts, using the exact defined conversion factor rather than an estimate.
How do I convert cup to quart?
Multiply the cup value by 0.25. The converter above does this instantly to whatever precision you set.
How do I convert quart back to cup?
Use the reverse factor: 1 quart equals 4 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 quart?
Quart (qt) measures volume. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. It is classified as a US customary unit.
Is the cup to quart conversion exact?
Yes. The US liquid quart is exactly one-quarter of a US gallon: 0.946352946 liters. 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)