Gallons to Quarts Converter
1 US gallon = 4 US quarts. Paste a decimal or fraction and see the full volume chain.
Gallons to quarts conversion chart
| Gallons | Quarts |
|---|---|
| ¼ | 1 |
| ⅓ | 1⅓ |
| ½ | 2 |
| ¾ | 3 |
| 1 | 4 |
| 1⅓ | 5⅓ |
| 1½ | 6 |
| 2 | 8 |
| 3 | 12 |
| 5 | 20 |
| 10 | 40 |
Multiply gallons by 4
Quarts = gallons × 4. A half gallon is 2 quarts, 1½ gallons is 6 quarts, and 5 gallons is 20 quarts. Enter a decimal, simple fraction, mixed number, or Unicode fraction such as ½.
Divide quarts by 4
Gallons = quarts ÷ 4. Six quarts equals 1.5 gallons. A written unit overrides the selected direction, and Swap carries the unrounded answer back into the input.
US liquid and Imperial volume chains
One US liquid gallon equals 4 US liquid quarts, 8 US liquid pints, 16 US cups, or 128 US fluid ounces. One Imperial gallon equals 4 Imperial quarts, 8 Imperial pints, or 160 Imperial fluid ounces. The page hides cups in Imperial mode because a cup is not part of the legal Imperial gallon-to-pint chain used here.
Why the system selector matters
The number of quarts per gallon is four in both supported systems, but the physical volumes are not interchangeable. A US liquid gallon is about 3.785 liters; an Imperial gallon is 4.54609 liters. Keep each gallon paired with quarts from the same system. US dry measure and ingredient weight need separate definitions and are intentionally rejected.
Frequently asked questions
How many quarts are in a gallon?
There are exactly 4 quarts in 1 gallon. The 4-to-1 relationship holds within both the US liquid and Imperial systems, but the absolute sizes of the two systems differ.
How many quarts are in 2 or 5 gallons?
Two gallons equal 8 quarts, and 5 gallons equal 20 quarts. Multiply gallons by 4, or use a shortcut above.
How do I convert quarts to gallons?
Divide quarts by 4. For example, 6 quarts ÷ 4 = 1.5 gallons. Select Quarts, paste a qt label, or use Swap after another conversion.
Are US and Imperial gallons the same size?
No. A US liquid gallon is about 3.785 liters, while an Imperial gallon is exactly 4.54609 liters. Each system still divides its own gallon into 4 of its own quarts, so never mix a US gallon with an Imperial quart.
Does this convert dry gallons or ingredient weights?
No. This page supports US liquid and Imperial volume only. It rejects dry, metric, cup, pint, fluid-ounce, and weight-unit text in the main input so a mismatched unit is not silently converted.