A US customary cup is 236.5882365 milliliters.
Cups to Imperial quarts Converter — cup to imp qt
Convert Cup (cup) to Imperial quart (imp qt) using the exact conversion factor (1 cup = 0.2081685462 imperial quart). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Cups to Imperial 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.
An imperial quart is one quarter of an imperial gallon.
Result = input x 0.0002365882365 / 0.0011365225.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Cups to Imperial quarts
Cup and Imperial 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 Imperial quart is typically associated with united Kingdom and Commonwealth countries (historically).
Formula
imperial quarts = cups × 0.208168546157
This factor comes from each unit's defined relationship to the category's base unit: 1 cup equals 0.0002365882365 base units, and 1 imperial quart equals 0.0011365225 base units, so dividing one by the other gives the direct cup-to-imperial quart factor of 0.208168546157.
Simple example
1 cup × 0.2081685462 = 0.2081685462 imp qt
1 cup = 0.2081685462 imperial quarts.
Real-world example
10 cup × 0.2081685462 = 2.081685462 imp qt
10 cups = 2.081685462 imperial quarts.
Conversion table
| Cup (cup) | Imperial quart (imp qt) |
|---|---|
| 1 cup | 0.2081685462 imp qt |
| 5 cup | 1.040842731 imp qt |
| 10 cup | 2.081685462 imp qt |
| 25 cup | 5.204213654 imp qt |
| 50 cup | 10.40842731 imp qt |
| 100 cup | 20.81685462 imp qt |
Reverse conversion: Imperial quart to Cup
0.2081685462 imp qt × 4.803799702 = 1 cup
0.2081685462 imperial quarts = 1 cups.
cups = imperial quarts × 4.80379970202
For a page dedicated to this direction, see Imperial quart to Cup.
Cup vs. Imperial quart
| Aspect | Cup | Imperial quart |
|---|---|---|
| Family | US customary unit (culinary) | UK/imperial customary unit |
| Typical use | US recipe and cooking measurement | UK/Commonwealth liquid measurement in historical or specialized contexts |
| Where it's used | United States (recipes and cooking measurement) | United Kingdom and Commonwealth countries (historically) |
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 Imperial quart
Imperial quart (imp qt) measures volume. The imperial quart is one-quarter of an imperial gallon: exactly 1.1365225 liters. It is classified as a UK/imperial customary unit.
Where it's used: United Kingdom and Commonwealth countries (historically)
Imperial quart vs. US quart. Like the gallon and pint, the imperial quart is about 20% larger than the US quart, following from Britain's 1824 gallon redefinition.
Uses of the Imperial quart today
- UK/Commonwealth liquid measurement in historical or specialized contexts
History of the Imperial quart
The imperial quart follows directly from the 1824 imperial gallon as one-quarter of it, part of the same UK standardization that diverged from the US gallon system.
Historical origin. Imperial 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.
Imperial quart — sources
- UK Weights and Measures Act 1824 — Basis for the imperial quart via the imperial gallon.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many imperial quarts are in 1 cup?
1 cup equals 0.2081685462 imperial quarts, using the exact defined conversion factor rather than an estimate.
How do I convert cup to imperial quart?
Multiply the cup value by 0.2081685462. The converter above does this instantly to whatever precision you set.
How do I convert imperial quart back to cup?
Use the reverse factor: 1 imperial quart equals 4.803799702 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 imperial quart?
Imperial quart (imp qt) measures volume. The imperial quart is one-quarter of an imperial gallon: exactly 1.1365225 liters. It is classified as a UK/imperial customary unit.
Is the cup to imperial quart conversion exact?
Yes. The imperial quart is one-quarter of an imperial gallon: exactly 1.1365225 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)