Convert US gallons to quarts

1 gal (US)=4qt

Use the converter below to change any US gallons value into quarts instantly — with formula, conversion table, and real-world examples.

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Conversion formula

Forward

quarts = US gallons × 4

Reverse

US gallons = quarts × 0.25

Example: 10 gal (US) × 4 = 40 qt.

About both units

From

US Gallon

gal (US)

The US gallon equals 3.785411784 litres exactly. It is the standard fuel and liquid volume unit in the United States. A typical American car holds 14–18 US gallons of fuel. US fuel economy is quoted in miles per US gallon (mpg).

Real-world: US car tank ≈ 15 gallons (57 L). 1 US gallon of milk is a common grocery size (3.79 L). US paint often sold by the gallon.

Read full us gallon reference →

Quart

The US liquid quart equals 946 millilitres — 2 pints or 1/4 US gallon. The UK imperial quart (1.137 L) is larger, like the other UK liquid units. Quarts are used in US cooking recipes and for motor-oil bottles.

Real-world: A US quart of motor oil is 946 ml. A "quart of milk" in the US ≈ 1 L. UK "quart" is rare today.

Read full quart reference →

US Gallon to Quart conversion table

Common US gallons to quarts values for quick reference.

US Gallon (gal (US))	Quart (qt)
1 gal (US)	4 qt
2 gal (US)	8 qt
5 gal (US)	20 qt
10 gal (US)	40 qt
20 gal (US)	80 qt
50 gal (US)	200 qt
100 gal (US)	400 qt
200 gal (US)	800 qt
500 gal (US)	2,000 qt
1,000 gal (US)	4,000 qt

Tips & common mistakes

Quick tips

1 US gallon = 3.785 L = 128 US fluid ounces = 4 quarts.
Converting mpg (US) to L/100 km: 235.215 / mpg = L/100 km.
The US gallon is based on the old English Queen Anne wine gallon (1707).

Avoid these

Using UK gallons on a US fuel-economy figure — 30 mpg (US) = 36 mpg (UK).
Confusing US gallon (3.79 L) with UK gallon (4.55 L) — 20% difference.
Using "gallon" without qualifier in cross-Atlantic commerce.

Frequently asked questions

How many quarts in a us gallon?

One us gallon equals 4 quarts.

How do I convert US gallons to quarts?

Multiply the us gallon value by 4 to get the equivalent in quarts.

What is 100 US gallons in quarts?

100 US gallons equals 400 quarts.

Is a us gallon bigger than a quart?

Yes. 1 us gallon equals 4 quarts, so one us gallon is larger.

How to convert US gallons to quarts without a calculator?

Multiply by 4 for a quick estimate; use a calculator for precise results.

Related volume conversions

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