651 milliliters in US quarts
Result
The conversion result is: 651 milliliters is equivalent to 0.687904024340618 US quarts.[1]
Conversion formula
How to convert 651 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 / 651 ml ≈ 0.00105668820943259 usquart / x usquart
Now, we cross multiply to solve for our unknown x:
x usquart ≈ (651 ml / 1 ml) * 0.00105668820943259 usquart → x usquart ≈ 0.6879040243406161 usquart
Conclusion:
651 ml ≈ 0.6879040243406161 usquart

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US quart is equal to 1.45369116129032 times 651 milliliters.
It can also be expressed as: 651 milliliters is equal to 1 / 1.45369116129032 US quarts.
Approximation
An approximate numerical result would be: six hundred and fifty-one milliliters is about zero point six nine US quarts, or alternatively, a US quart is about one point four four times six hundred and fifty-one 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.