US Quarts to US Gallons Converter
One US Quart equals 0.25 US Gallons (1 qt = 0.25 gal). Multiply a US Quart value by 0.25 to get the equivalent in US Gallons. Use the calculator above for your value, or check the examples and reference table below.
Formula
gal = qt × 0.25
Multiply the US Quart value by 0.25 to get the equivalent value in US Gallons.
Example Conversions
1 US Quart (qt)
0.25 US Gallon (gal)
5 US Quart (qt)
1.25 US Gallon (gal)
10 US Quart (qt)
2.5 US Gallon (gal)
25 US Quart (qt)
6.25 US Gallon (gal)
100 US Quart (qt)
25 US Gallon (gal)
Conversion Table
| US Quart (qt) | US Gallon (gal) |
|---|---|
| 0.1 | 0.025 |
| 0.5 | 0.125 |
| 1 | 0.25 |
| 2 | 0.5 |
| 5 | 1.25 |
| 10 | 2.5 |
| 25 | 6.25 |
| 50 | 12.5 |
| 100 | 25 |
| 250 | 62.5 |
| 500 | 125 |
| 1000 | 250 |
How to Convert Manually
Use these steps to convert US Quart values to US Gallon without the calculator.
- Write down the value in US Quart (qt) that you want to convert.
- Multiply that value by 0.25.
- For example, 10 US Quarts × 0.25 = 2.5 US Gallons.
- Label the result as US Gallon (gal).
Relative Size Comparison
This chart shows the visual difference in size between exactly one US Quart and one US Gallon.
About US Quart and US Gallon
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. 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. One US Quart equals 0.25 US Gallons (1 qt = 0.25 gal). US Quart is used in US motor oil containers and in US canning and cooking. US Gallon is used in US fuel prices.
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
15US Quarts equals3.75US Gallons.
15 qt × 0.25 = 3.75 gal
FAQ
How do I convert US Quart to US Gallon?
Multiply the US Quart value by 0.25 to get the equivalent value in US Gallons.
What is the formula for US Quart to US Gallon?
The formula is gal = qt × 0.25.
How many US Gallons are in 1 US Quart?
1 US Quart equals 0.25 US Gallons.
Can I convert US Gallon back to US Quart?
Yes. 1 US Gallon equals 4 US Quarts, and the related converter can reverse the calculation.
What are common names for US Quart and US Gallon?
US Quart is shown as qt and may also be searched as quarts, us quarts. US Gallon is shown as gal and may also be searched as gallons, us gallons.
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