21 centiliters in US quarts

Conversion formula
How to convert 21 centiliters to US quarts?

We know (by definition) that: $1\mathrm{centiliter}\approx 0.0105668820943259\mathrm{usquart}$

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

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

Conclusion: 21 ⁢ centiliter ≈ 0.22190452398084387 ⁢ usquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US quart is equal to 4.5064426 times 21 centiliters.

It can also be expressed as: 21 centiliters is equal to $\frac{1}{\mathrm{4.5064426}}$ US quarts.

Approximation

An approximate numerical result would be: twenty-one centiliters is about zero point two two US quarts, or alternatively, a US quart is about four point five zero times twenty-one centiliters.