Convert quarts and gallons
Live calculation
- Enter a value.
- Select the conversion direction.
- Choose a matching measurement system.
Formula used
One gallon contains four quarts in each matching system.
US liquid, US dry, and Imperial units differ in physical volume. Their within-system quart-to-gallon ratio remains four to one.
How to use this calculator
- Enter the quantity you want to convert.
- Choose quarts to gallons or reverse conversion.
- Select US liquid, US dry, or Imperial.
- Choose the number of decimal places needed.
- Read, copy, print, or download the result.
Common quarts to gallons conversions
| Quarts | Gallons | Calculation |
|---|---|---|
| 1 | 0.25 | 1 ÷ 4 |
| 2 | 0.5 | 2 ÷ 4 |
| 3 | 0.75 | 3 ÷ 4 |
| 4 | 1 | 4 ÷ 4 |
| 8 | 2 | 8 ÷ 4 |
| 12 | 3 | 12 ÷ 4 |
| 16 | 4 | 16 ÷ 4 |
| 20 | 5 | 20 ÷ 4 |
Worked examples
Example 1: Convert 10 quarts to gallons.
10 ÷ 4 = 2.5 gallons
Example 2: Convert 3.5 gallons to quarts.
3.5 × 4 = 14 quarts
Example 3: Convert 0.75 quart to gallons.
0.75 ÷ 4 = 0.1875 gallon
Understanding quarts and gallons
What is a quart?
A quart is a customary volume unit. Four quarts make one matching gallon.
What is a gallon?
A gallon is a larger volume unit. Each gallon contains four matching quarts.
US versus Imperial measurements
US liquid and Imperial gallons are not equal volumes. US dry units also differ. Use matching systems for accurate real-world volume comparisons.
Frequently asked questions
How many quarts are in one gallon?
There are four quarts in one matching gallon.
How do I convert quarts to gallons?
Divide the number of quarts by four.
How do I convert gallons to quarts?
Multiply the number of gallons by four.
Does the ratio change for Imperial units?
No. One Imperial gallon also contains four Imperial quarts.
Can I enter decimal values?
Yes. Decimal quantities and fractional equivalents are supported.