21 US customary cups in US quarts

Result

The conversion result is: 21 US customary cups is equivalent to 5.25 US quarts.[1]

Conversion formula
How to convert 21 US customary cups to US quarts?

We know (by definition) that: 1 uscup ≈ 0.25 usquart.

We can set up a proportion to solve for the number of US quarts.

1 uscup / 21 uscup ≈ 0.25 usquart / x usquart

Now, we cross multiply to solve for our unknown x:

x usquart ≈ (21 uscup / 1 uscup) * 0.25 usquart → x usquart ≈ 5.25 usquart

Conclusion:

21 uscup ≈ 5.25 usquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US quart is equal to 0.19047619047619 times 21 US customary cups.

It can also be expressed as: 21 US customary cups is equal to 1 / 0.19047619047619 US quarts.

Approximation

An approximate numerical result would be: twenty-one US customary cups is about zero US quarts, or alternatively, a US quart is about zero point one nine times twenty-one US customary cups.

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.