How Many Quarts in a Gallon?
There are exactly 4 quarts in one US gallon.
How to Convert Gallons to Quarts
To convert gallons to quarts, multiply by 4.
For example: 5 gallons × 4 = 20 quarts.
Why This Number Matters
Paint, motor oil, stock and ice cream are all sold in both sizes, so the conversion decides which container to buy. It is also the top of the US volume chain: gallon, quart, pint, cup.
A gallon of paint covers about 400 square feet, which means each quart covers roughly 100.
What People Get Wrong
Motor oil is sold in quarts but engine capacities are often published in liters. A 5-quart capacity is 4.73 liters, so a 5-liter jug is more than one oil change needs.
Gallons to Quarts Conversion Table
| Gallons (gal) | Quarts (qt) |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 12 |
| 4 | 16 |
| 5 | 20 |
| 6 | 24 |
| 7 | 28 |
| 8 | 32 |
| 9 | 36 |
| 10 | 40 |
| 11 | 44 |
| 12 | 48 |
| 13 | 52 |
| 14 | 56 |
| 15 | 60 |
| 16 | 64 |
| 17 | 68 |
| 18 | 72 |
| 19 | 76 |
| 20 | 80 |
| 25 | 100 |
| 30 | 120 |
| 40 | 160 |
| 50 | 200 |
| 75 | 300 |
| 100 | 400 |
| 250 | 1,000 |
| 500 | 2,000 |
| 1,000 | 4,000 |
About These Units
The gallon
A US liquid gallon is exactly 3.785411784 liters, made up of 4 quarts or 128 fluid ounces. The UK imperial gallon is a different unit of 4.546 liters, about 20 percent larger.
The quart
A US liquid quart is 2 pints, 4 cups or about 946 milliliters, which makes it just under a liter. Milk, stock and motor oil are commonly sold by the quart in the United States.
Definitions follow NIST Handbook 44, Appendix C. See how we calculate for the exact values and rounding rules.
Frequently Asked Questions
How many quarts in half a gallon?
Half a gallon is 2 quarts.
How many pints in a gallon?
A gallon holds 8 pints: 4 quarts of 2 pints each.
Is a quart a quarter of a gallon?
Yes, and that is where the name comes from. The word quart is short for quarter-gallon.
How many liters in a quart?
One US liquid quart is 0.946353 liters.