644 deciliters in US dry barrels
Result
The conversion result is: 644 deciliters is equivalent to 0.556962743721763 US dry barrels.[1]
Conversion formula
How to convert 644 deciliters to US dry barrels?
We know (by definition) that: 1 dl ≈ 0.000864848980934415 drybarrel.
We can set up a proportion to solve for the number of US dry barrels.
1 dl / 644 dl ≈ 0.000864848980934415 drybarrel / x drybarrel
Now, we cross multiply to solve for our unknown x:
x drybarrel ≈ (644 dl / 1 dl) * 0.000864848980934415 drybarrel → x drybarrel ≈ 0.5569627437217632 drybarrel
Conclusion:
644 dl ≈ 0.5569627437217632 drybarrel

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US dry barrel is equal to 1.79545222956522 times 644 deciliters.
It can also be expressed as: 644 deciliters is equal to 1 / 1.79545222956522 US dry barrels.
Approximation
An approximate numerical result would be: six hundred and forty-four deciliters is about zero point five six US dry barrels, or alternatively, a US dry barrel is about one point eight zero times six hundred and forty-four deciliters.
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.