20 milliliters in US quarts
Result
The conversion result is: 20 milliliters is equivalent to 0.0211337641886519 US quarts.[1]
Conversion formula
How to convert 20 milliliters to US quarts?
We know (by definition) that: 1 ml ≈ 0.00105668820943259 usquart.
We can set up a proportion to solve for the number of US quarts.
1 ml / 20 ml ≈ 0.00105668820943259 usquart / x usquart
Now, we cross multiply to solve for our unknown x:
x usquart ≈ (20 ml / 1 ml) * 0.00105668820943259 usquart → x usquart ≈ 0.021133764188651802 usquart
Conclusion:
20 ml ≈ 0.021133764188651802 usquart

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US quart is equal to 47.3176473 times 20 milliliters.
It can also be expressed as: 20 milliliters is equal to 1 / 47.3176473 US quarts.
Approximation
An approximate numerical result would be: twenty milliliters is about zero point zero two US quarts, or alternatively, a US quart is about forty-seven point three two times twenty milliliters.
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.