Convert US Gallon to Imperial Quart
Convert us gallons to imperial quarts instantly. 1 us gallon = 3.3306967385 imperial quart — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Quart to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Imperial Quart
An imperial quart is one quarter of an imperial gallon (1.13652 L).
A subdivision of the 1824 imperial gallon.
Used in the UK and Commonwealth.
UK, 1824.
US Gallon to Imperial Quart conversion formula
The relationship between us gallons and imperial quarts:
To convert us gallons to imperial quarts, multiply the value in us gallons by 3.3306967385. To reverse, multiply imperial quarts by 0.3002374814.
How to use this converter
Type a value into the calculator. The result in imperial quarts updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Imperial Quart to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to imperial quarts
- Write down the value in us gallons (gal).
- Multiply that value by the factor 3.3306967385.
- The product is the equivalent value in imperial quarts (qt).
- To reverse, multiply the imperial quart value by 0.3002374814.
Worked examples
Example 1 — Convert 1 gal to qt:
1 × 3.3306967385 = 3.3306967385 qt
Example 2 — Convert 100 gal to qt:
100 × 3.3306967385 = 333.0696738516 qt
Real-world example — Postcard and small-object dimensions
A postcard is about 5 us gallons wide. Converting to imperial quarts is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 gal × 3.3306967385 = 16.6534836926 qt
Real-world example — Ruler-scale measurements
A 30-us gallon school ruler converts cleanly to imperial quarts — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 gal × 3.3306967385 = 99.9209021555 qt
Real-world example — Hardware-scale dimensions
A 10-us gallon fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between us gallons and imperial quarts daily when mixing metric and imperial tools.
10 gal × 3.3306967385 = 33.3069673852 qt
US Gallon to Imperial Quart conversion table
Standard reference values for converting us gallons to imperial quarts:
| US Gallon [gal] | Imperial Quart [qt] |
|---|---|
| 0.01 | 0.0333069674 |
| 0.1 | 0.3330696739 |
| 1 | 3.3306967385 |
| 2 | 6.661393477 |
| 3 | 9.9920902155 |
| 4 | 13.3227869541 |
| 5 | 16.6534836926 |
| 10 | 33.3069673852 |
| 20 | 66.6139347703 |
| 30 | 99.9209021555 |
| 40 | 133.2278695406 |
| 50 | 166.5348369258 |
| 100 | 333.0696738516 |
| 500 | 1665.348369258 |
| 1000 | 3330.696738516 |
Frequently asked questions
How many imperial quarts is 1 us gallon?
How do I convert us gallons to imperial quarts?
How do I convert imperial quarts back to us gallons?
How many imperial quarts is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 3.3306967385 qt) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.