How many quarts are in a gallon?

There are exactly 4 quarts in one US gallon. The word 'quart' comes from the Latin 'quartus' meaning one-fourth, since a quart is one-quarter of a gallon.

Is a US quart the same as an Imperial quart?

No. A US liquid quart equals 946.353 mL, while an Imperial quart equals 1,136.52 mL. An Imperial quart is about 20% larger than a US quart. However, both systems have 4 quarts per gallon.

How many cups are in a quart?

There are 4 US cups in one US quart. Since there are 4 quarts in a gallon, that means there are 16 cups in a gallon.

How to Convert Gallons to Quarts - Formula, Examples & Chart

The Gallons to Quarts Formula

This is one of the simplest volume conversions. The quart was originally defined as one-quarter of a gallon, making the conversion factor a clean whole number:

Quarts = Gallons × 4

This applies to both US liquid gallons (3.785 liters) and Imperial gallons (4.546 liters). Both systems define a quart as exactly one-fourth of their respective gallon.

Step-by-Step Examples

Example 1: Converting 2 Gallons to Quarts

Calculation: 2 × 4 = 8 quarts.
Result: 2 gallons = 8 quarts.

Example 2: Converting 1.5 Gallons to Quarts

Calculation: 1.5 × 4 = 6 quarts.
Result: 1.5 gallons = 6 quarts.

Example 3: A Recipe Calls for 3 Quarts but You Measure in Gallons

Reverse: 3 ÷ 4 = 0.75 gallons.
Result: 3 quarts = 0.75 gallons (three-quarters of a gallon).

US Volume Units Breakdown

Gallons	Quarts	Pints	Cups	Fluid Ounces
0.25	1	2	4	32
0.5	2	4	8	64
1	4	8	16	128
2	8	16	32	256
3	12	24	48	384
5	20	40	80	640
10	40	80	160	1,280

Real-World Applications

Cooking and Meal Prep

Large batch cooking often requires converting between gallons and quarts. A gallon of soup, for example, yields 4 quart-sized containers for storage or freezing.

Automotive

Engine oil is typically sold in quart bottles, but oil capacity is sometimes listed in gallons. A vehicle requiring 1.25 gallons of oil needs 5 quarts.

Gardening and Landscaping

Liquid fertilizers and pesticide concentrates often provide mixing ratios in quarts per gallon of water. Understanding the relationship helps ensure accurate dilution for plant health.

US vs Imperial Quarts

While both systems have 4 quarts per gallon, the actual volumes differ. A US quart is 946.353 mL while an Imperial quart is 1,136.52 mL (about 20% larger). This distinction matters when following recipes from British versus American sources. Use our volume converter to switch between any volume units precisely.