An imperial quart is one quarter of an imperial gallon.
Imperial quarts to Quarts Converter — imp qt to qt
Convert Imperial quart (imp qt) to Quart (qt) using the exact conversion factor (1 imperial quart = 1.200949926 quart). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Imperial quarts 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 0.0011365225 / 0.000946352946.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial quarts to Quarts
Imperial quart 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. Imperial quart is typically associated with united Kingdom and Commonwealth countries (historically), while Quart is typically associated with united States (cooking, dairy, motor oil packaging).
Formula
quarts = imperial quarts × 1.2009499255
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial quart equals 0.0011365225 base units, and 1 quart equals 0.000946352946 base units, so dividing one by the other gives the direct imperial quart-to-quart factor of 1.2009499255.
Simple example
1 imp qt × 1.200949926 = 1.200949926 qt
1 imperial quart = 1.200949926 quarts.
Real-world example
10 imp qt × 1.200949926 = 12.00949926 qt
10 imperial quarts = 12.00949926 quarts.
Conversion table
| Imperial quart (imp qt) | Quart (qt) |
|---|---|
| 1 imp qt | 1.200949926 qt |
| 5 imp qt | 6.004749628 qt |
| 10 imp qt | 12.00949926 qt |
| 25 imp qt | 30.02374814 qt |
| 50 imp qt | 60.04749628 qt |
| 100 imp qt | 120.0949926 qt |
Reverse conversion: Quart to Imperial quart
1.200949926 qt × 0.8326741846 = 1 imp qt
1.200949926 quarts = 1 imperial quarts.
imperial quarts = quarts × 0.832674184629
For a page dedicated to this direction, see Quart to Imperial quart.
Imperial quart vs. Quart
| Aspect | Imperial quart | Quart |
|---|---|---|
| Family | UK/imperial customary unit | US customary unit |
| Typical use | UK/Commonwealth liquid measurement in historical or specialized contexts | US recipe measurement (larger liquid volumes) |
| Where it's used | United Kingdom and Commonwealth countries (historically) | United States (cooking, dairy, motor oil packaging) |
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.
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.
Imperial quart — sources
- UK Weights and Measures Act 1824 — Basis for the imperial quart via the imperial gallon.
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 imperial quart?
1 imperial quart equals 1.200949926 quarts, using the exact defined conversion factor rather than an estimate.
How do I convert imperial quart to quart?
Multiply the imperial quart value by 1.200949926. The converter above does this instantly to whatever precision you set.
How do I convert quart back to imperial quart?
Use the reverse factor: 1 quart equals 0.8326741846 imperial quarts. You can also use the swap control in the converter above to flip the direction instantly.
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.
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 imperial quart 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 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 imperial quart still used today?
United Kingdom and Commonwealth countries (historically)