Cups to Quarts Converter

About the cup to qt calculation

One cup is exactly 0.25 quarts, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The US legal cup is 240 ml; the customary cup used in recipes is 236.6 ml. A quarter of a US gallon, and exactly two US pints.

Formula

qt = cup × 0.25

1 cup = 0.25 qt
1 qt = 4 cup

Worked example

To convert 1 cup, multiply by 0.25: 1 × 0.25 = 0.25 qt.

Frequently asked questions

How many quarts are in a cup?

There are 0.25 quarts in one cup. To convert any amount, multiply the number of cups by 0.25.

How do I convert quarts back to cups?

Divide instead of multiplying, or equivalently multiply by 4. One quart is 4 cups.

Is this conversion exact?

Yes. Since the international agreement of 1959, the relationship between cups and quarts is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.

Where is each of these units used?

Cups: the US legal cup is 240 ml; the customary cup used in recipes is 236.6 ml. Quarts: a quarter of a US gallon, and exactly two US pints.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units