A US liquid quart is one quarter of a US gallon.
Quarts to Imperial quarts Converter — qt to imp qt
Convert Quart (qt) to Imperial quart (imp qt) using the exact conversion factor (1 quart = 0.8326741846 imperial quart). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Quarts 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 0.000946352946 / 0.0011365225.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Quarts to Imperial quarts
Quart 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. Quart is typically associated with united States (cooking, dairy, motor oil packaging), while Imperial quart is typically associated with united Kingdom and Commonwealth countries (historically).
Formula
imperial quarts = quarts × 0.832674184629
This factor comes from each unit's defined relationship to the category's base unit: 1 quart equals 0.000946352946 base units, and 1 imperial quart equals 0.0011365225 base units, so dividing one by the other gives the direct quart-to-imperial quart factor of 0.832674184629.
Simple example
1 qt × 0.8326741846 = 0.8326741846 imp qt
1 quart = 0.8326741846 imperial quarts.
Real-world example
10 qt × 0.8326741846 = 8.326741846 imp qt
10 quarts = 8.326741846 imperial quarts.
Conversion table
| Quart (qt) | Imperial quart (imp qt) |
|---|---|
| 1 qt | 0.8326741846 imp qt |
| 5 qt | 4.163370923 imp qt |
| 10 qt | 8.326741846 imp qt |
| 25 qt | 20.81685462 imp qt |
| 50 qt | 41.63370923 imp qt |
| 100 qt | 83.26741846 imp qt |
Reverse conversion: Imperial quart to Quart
0.8326741846 imp qt × 1.200949926 = 1 qt
0.8326741846 imperial quarts = 1 quarts.
quarts = imperial quarts × 1.2009499255
For a page dedicated to this direction, see Imperial quart to Quart.
Quart vs. Imperial quart
| Aspect | Quart | Imperial quart |
|---|---|---|
| Family | US customary unit | UK/imperial customary unit |
| Typical use | US recipe measurement (larger liquid volumes) | UK/Commonwealth liquid measurement in historical or specialized contexts |
| Where it's used | United States (cooking, dairy, motor oil packaging) | United Kingdom and Commonwealth countries (historically) |
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.
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.
Quart — sources
- NIST Handbook 44, Appendix C — General tables of units including the US quart definition.
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 quart?
1 quart equals 0.8326741846 imperial quarts, using the exact defined conversion factor rather than an estimate.
How do I convert quart to imperial quart?
Multiply the quart value by 0.8326741846. The converter above does this instantly to whatever precision you set.
How do I convert imperial quart back to quart?
Use the reverse factor: 1 imperial quart equals 1.200949926 quarts. You can also use the swap control in the converter above to flip the direction instantly.
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.
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 quart 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 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.
Where is the quart still used today?
United States (cooking, dairy, motor oil packaging)