US Gallon to US Quart Converter
One US Gallon equals 4 US Quart (1 gal = 4 qt). Multiply a US Gallon value by 4 to get the equivalent in US Quart. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
qt = gal × 4
Multiply the US Gallon value by 4 to get the equivalent value in US Quart.
Example Conversions
1 US Gallon (gal)
4 US Quart (qt)
5 US Gallon (gal)
20 US Quart (qt)
10 US Gallon (gal)
40 US Quart (qt)
25 US Gallon (gal)
100 US Quart (qt)
100 US Gallon (gal)
400 US Quart (qt)
Conversion Table
| US Gallon (gal) | US Quart (qt) |
|---|---|
| 0.1 | 0.4 |
| 0.5 | 2 |
| 1 | 4 |
| 2 | 8 |
| 5 | 20 |
| 10 | 40 |
| 25 | 100 |
| 50 | 200 |
| 100 | 400 |
| 250 | 1000 |
| 500 | 2000 |
| 1000 | 4000 |
How to Convert Manually
Use these steps to convert US Gallon values to US Quart without the calculator.
- Write down the value in US Gallon (gal) that you want to convert.
- Multiply that value by 4.
- For example, 10 US Gallon × 4 = 40 US Quart.
- Label the result as US Quart (qt).
Relative Size Comparison
This chart shows the visual difference in size between exactly one US Gallon and one US Quart.
About US Gallon and US Quart
The US gallon is defined as 231 cubic inches, exactly 3.785411784 liters. US fuel prices, milk jugs, and paint cans are all per-gallon quantities. The US quart is a quarter of a US gallon, about 0.946 liters. US motor oil, ice cream, and canning recipes are sold and written in quarts. One US Gallon equals 4 US Quart (1 gal = 4 qt). US Gallon to US Quart conversion comes up most often in US fuel prices and in US milk and beverage containers, typically when figures need restating for US motor oil containers.
Precision and Rounding: US and imperial volume units share names but differ in size (an imperial gallon is about 20% larger than a US gallon), so confirm which system a figure uses before converting. Kitchen work tolerates rounding to the nearest milliliter or quarter-teaspoon; fuel, chemistry, and brewing need three or more decimal places.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 US Gallon equals 60 US Quart.
15 gal × 4 = 60 qt
FAQ
How do I convert US Gallon to US Quart?
Multiply the US Gallon value by 4 to get the equivalent value in US Quart.
What is the formula for US Gallon to US Quart?
The formula is qt = gal × 4.
How many US Quart are in 1 US Gallon?
1 US Gallon equals 4 US Quart.
Can I convert US Quart back to US Gallon?
Yes. 1 US Quart equals 0.25 US Gallon, and the related converter can reverse the calculation.
What are common names for US Gallon and US Quart?
US Gallon is shown as gal and may also be searched as gallons, us gallons. US Quart is shown as qt and may also be searched as quarts, us quarts.
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