Quarts to Gallons Converter

Divide quarts by 4 to get gallons. A car’s 5-quart oil capacity is 1.25 gallons.

How to use the Quarts to Gallons Converter

1. Type the number of US quarts into the US quarts field. Decimals such as 2 are fine.
2. Read the answer in US gallons – it updates as you type, with no button to press.
3. To convert the other way, type into US gallons and the US quarts are recalculated.
4. Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.

This page converts only US qt ⇄ US gal. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.

How it works

Both units measure volume, so they are always in the same ratio: one US quart equals 0.25 US gallons. The calculator multiplies the number of US quarts you type by 0.25 to give US gallons, and when you type into the US gallons field it divides by the same factor to give US quarts. Because the ratio never changes, doubling the US quarts always doubles the US gallons. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

How to convert US quarts to US gallons

1. Write down the value in US quarts, for example 4 US qt.
2. Multiply by the conversion factor 0.25 (because 1 US quart = 0.25 US gal).
3. 4 × 0.25 = 1 US gal.
4. To go back from US gallons to US quarts, divide by 0.25 – or multiply by 4.

US qt to US gal conversion table

What is a US quart?

A U.S. quart is a quarter of a gallon, about 946 mL. Engine oil, ice cream and soups are often sold by the quart.

What is a US gallon?

The U.S. liquid gallon is exactly 231 cubic inches, about 3.785 litres. It is used for fuel, milk, water and paint in the United States.

Common mistakes to avoid

Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.