1 US Quart equals 0.25 US Gallons.
| US Quart (qt) | US Gallon (gal) |
|---|---|
| 0.001 qt | 0.00025 gal |
| 0.01 qt | 0.0025 gal |
| 0.1 qt | 0.025 gal |
| 1 qt | 0.25 gal |
| 2 qt | 0.5 gal |
| 5 qt | 1.25 gal |
| 10 qt | 2.5 gal |
| 25 qt | 6.25 gal |
| 50 qt | 12.5 gal |
| 100 qt | 25 gal |
| 500 qt | 125 gal |
| 1,000 qt | 250 gal |
To convert US Quarts to US Gallons, multiply the value by 0.25. This factor comes from the ratio of the two units' definitions: one US Quart equals 0.25 US Gallons.
For example: 1 US Quart = 0.25 US Gallons, and 10 US Quarts = 2.5 US Gallons.
To convert in the reverse direction — from US Gallons to US Quarts — multiply by 4.
The quart (qt) equals two pints or one quarter of a gallon. Like the pint, it comes in US and imperial versions: the US liquid quart is approximately 946 mL (close to one liter), while the imperial quart is approximately 1,136 mL. The name comes from the Latin "quartus," meaning a fourth — specifically, a fourth of a gallon. The convenient near-equivalence of a US quart to one liter makes it useful for rough mental conversions.
In the United States, quarts appear frequently in cooking for liquid ingredients at moderate quantities: a quart of chicken broth, a quart of milk, a quart of paint. Motor oil is sold in quart containers in the US, and recipes for soups, stocks, and brines often specify quart quantities. A typical large saucepan holds about 3–4 quarts. Heavy cream and half-and-half are sold in quart cartons at grocery stores.
Outside the United States and the United Kingdom (where the imperial quart is occasionally still used), the quart has been displaced entirely by the liter. A US quart (0.946 L) and a liter (1.000 L) differ by only about 5.7%, which means you can substitute one for the other in most cooking contexts with only minor effects. In liquid measure, 4 US quarts = 1 US gallon = 3.785 liters.
The US liquid gallon is defined as exactly 231 cubic inches, or approximately 3.785 liters. It equals 4 quarts, 8 pints, or 128 fluid ounces. The gallon is the standard large-volume liquid unit in the United States and appears on virtually every fuel pump, milk jug, and water cooler in the country. US fuel economy is typically measured in miles per gallon (mpg), making the gallon central to automobile culture and environmental policy discussions in America.
The gallon traces its origins to English medieval measures, where it was defined differently for wine (the wine gallon, which became the US gallon) and for ale (the ale gallon, larger). The wine gallon's adoption in the American colonies and its eventual standardization as the US gallon explains why the US gallon (3.785 L) is smaller than the imperial gallon (4.546 L) still used in the UK for some purposes. A US gallon of water weighs about 8.34 pounds, and a gallon of gasoline weighs about 6.3 pounds.
The gallon is used in the US for large-scale liquid quantities across many industries: agricultural irrigation (acre-feet can be expressed in millions of gallons), plumbing fixture ratings (gallons per flush, gallons per minute), swimming pool capacities, and paint coverage (square feet per gallon). Outside the US, the liter has completely replaced the gallon for fuel and most liquids, though the imperial gallon persists for some UK fuel contexts and the phrase "miles per gallon" remains in British usage.
1 US Quart equals 0.25 US Gallons.
To convert US Quarts to US Gallons, multiply by 0.25. For example, 1 US Quart = 0.25 US Gallons.
1 US Gallon equals 4 US Quarts.