Convert US Gallon to Quart (gal (US) → qt)
The US gallon is the standard unit for fuel, milk, and beverages across the United States.
US Gallon to Quart Conversion Table
10 common values| US Gallon | Quart |
|---|---|
| 1 gal (US) | 4 qt |
| 2 gal (US) | 8 qt |
| 5 gal (US) | 20 qt |
| 10 gal (US) | 40 qt |
| 20 gal (US) | 80 qt |
| 50 gal (US) | 200 qt |
| 100 gal (US) | 400 qt |
| 200 gal (US) | 800 qt |
| 500 gal (US) | 2,000 qt |
| 1,000 gal (US) | 4,000 qt |
How to Convert US Gallon to Quart Manually
Step by StepConverting US gallons to quarts is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in US gallonsStart with the number of US gallons (gal (US)) you want to convert.
- 2Multiply by 4The conversion factor from gal (US) to qt is 4. Multiply your value by this number.
- 3Read the result in quartsThe result is your value in quarts (qt).
Formula
Multiply the value in US gallons by 4. For the reverse direction, multiply by 0.25.
qt = gal (US) × 4gal (US) = qt × 0.25Tips
Use these in everyday conversions- 1 US gallon = 3.785 L = 128 US fluid ounces = 4 quarts.
- Converting mpg (US) to L/100 km: 235.215 / mpg = L/100 km.
- The US gallon is based on the old English Queen Anne wine gallon (1707).
Common Mistakes
Avoid these- Using UK gallons on a US fuel-economy figure — 30 mpg (US) = 36 mpg (UK).
- Confusing US gallon (3.79 L) with UK gallon (4.55 L) — 20% difference.
- Using "gallon" without qualifier in cross-Atlantic commerce.
About US Gallon and Quart
What is the US Gallon?
The US liquid gallon equals exactly 3.785411784 liters and is the standard volume unit for fuel, beverages, milk, and household liquids in the United States. Defined as 231 cubic inches, the US gallon descends from the English wine gallon of 1707, which Britain replaced with the larger imperial gallon in 1824 — a divergence that left the United States with a different gallon than the rest of the English-speaking world. American gas stations price gasoline by the gallon (typical fill-up: 12–15 gallons), milk is sold in half-gallons and gallons, and many beverages come in fluid-ounce subdivisions of the gallon. The US gallon relates to the liter (1 gal ≈ 3.785 L), the quart (4 qt = 1 gal), the pint (8 pt = 1 gal), the cup (16 cups = 1 gal), and the imperial gallon (1 imp gal ≈ 1.201 US gal — about 20% larger).
- US fuel pricing and consumption
- US paint, oil and cleaning-product packaging
- US beverage containers (1-gallon jugs of milk)
US car tank ≈ 15 gallons (57 L). 1 US gallon of milk is a common grocery size (3.79 L). US paint often sold by the gallon.
What is the Quart?
The US quart equals exactly one quarter of a US gallon (0.946352946 liters) and is a common kitchen and motor-oil volume in the United States. The word 'quart' derives from the Latin 'quartus' meaning fourth. Milk and motor oil are commonly sold in quart containers (a quart of motor oil is 32 fl oz), and large recipes call for quart-sized stockpots. The US quart is distinct from the slightly larger UK imperial quart (1.137 L). It relates to the gallon (4 qt = 1 gal), the pint (2 pt = 1 qt), the cup (4 cups = 1 qt), the fluid ounce (32 fl oz = 1 qt), and the liter (1 US qt ≈ 0.946 L). The quart is a useful intermediate volume between the cup (small recipe measurements) and the gallon (bulk liquids).
- US cooking recipe quantities
- US motor-oil container sizes (1 quart bottles)
- Canning and preserving containers
A US quart of motor oil is 946 ml. A "quart of milk" in the US ≈ 1 L. UK "quart" is rare today.