Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 qt | 0.00025 gal | |
| 0.01 qt | 0.0025 gal | |
| 0.1 qt | 0.025 gal | |
| 1 qt | 0.25 gal | |
| 5 qt | 1.25 gal | |
| 10 qt | 2.5 gal | |
| 50 qt | 12.5 gal | |
| 100 qt | 25 gal | |
| 1000 qt | 250 gal |
Common us quart values converted to us gallon — factor: 1 qt = 0.25 gal
| US Quart (qt) | US Gallon (gal) | Context |
|---|---|---|
| 0.0625 qt | 0.01563 gal | Cup |
| 0.125 qt | 0.03125 gal | Half pint |
| 0.25 qt | 0.0625 gal | Pint |
| 0.5 qt | 0.125 gal | Large bottle |
| 1 qt | 0.25 gal | Quart bottle |
| 2 qt | 0.5 gal | Half gallon |
| 4 qt | 1 gal | Gallon jug |
| 8 qt | 2 gal | 2 gallons |
| 16 qt | 4 gal | 4 gallons |
| 32 qt | 8 gal | 8 gallons |
| 64 qt | 16 gal | 16 gallons |
| 128 qt | 32 gal | 32 gallons |
| 200 qt | 50 gal | 50 gallons |
| 256 qt | 64 gal | 50 gallons |
| 500 qt | 125 gal | Large tank |
Converting us quart to us gallon comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using us gallon, or a laboratory protocol may specify volumes in us quart that need to be measured with equipment calibrated in us gallon.
In everyday use, knowing that 5 qt = 1.25 gal and 10 qt = 2.5 gal covers most common situations. For bulk calculations, 100 qt = 25 gal is a useful anchor. The reverse conversion — us gallon back to us quart — uses the factor 4, so 1 gal = 4 qt.
All conversions use the internationally recognized factor of exactly 1 qt = 0.25 gal. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: US Gallon = US Quart × 0.25000013
Multiply any us quart value by 0.25000013 to get us gallon. One us quart equals 0.25000013 gal.
Reverse: US Quart = US Gallon × 3.9999979
Quarts ÷ 4 = US gallons. Exact.
4 qt = 1 gal, 8 qt = 2 gal, 16 qt = 4 gal.
Gallons × 4 = quarts.
Changes engine oil sold in quart bottles, the standard US motor oil size.
Produces and sells ice cream in quart containers, the classic American retail size.
Stores soups, stocks, and sauces in quart deli containers for organized kitchen prep.
Buys house paint in quart cans for smaller projects, about 90 sq ft per coat.
Scales recipes using quarts: 4 cups = 1 quart for easy mental division.
Measures buffer solutions and culture media in quart batches for microbiology.
The US liquid quart is one-quarter of a US gallon, equal to 946.353 mL. The word 'quart' comes from Old French quarte (fourth part), dating to medieval England.
Quarts are standard in American cooking and food packaging: motor oil, paint, cream, and ice cream are commonly sold in quart containers.
Interesting fact: The US quart and the Imperial quart differ significantly — the Imperial quart is 1.136 liters versus 0.946 liters for the US quart.
The US liquid gallon is defined as exactly 231 cubic inches, or 3.785411784 liters. It traces its origins to the Queen Anne wine gallon of 1707, which American colonies adopted.
The US gallon differs from the UK Imperial gallon by about 16.5%. This matters for fuel economy: a US MPG figure is lower than the equivalent UK MPG for the same car.
Interesting fact: The United States, Liberia, and Myanmar are the only countries using the US gallon as a primary everyday volume unit.