501 US gallons in US dry barrels
Result
The conversion result is: 501 US gallons is equivalent to 16.4017857142857 US dry barrels.[1]
Conversion formula
How to convert 501 US gallons to US dry barrels?
We know (by definition) that: 1 usgallon ≈ 0.0327380952380952 drybarrel.
We can set up a proportion to solve for the number of US dry barrels.
1 usgallon / 501 usgallon ≈ 0.0327380952380952 drybarrel / x drybarrel
Now, we cross multiply to solve for our unknown x:
x drybarrel ≈ (501 usgallon / 1 usgallon) * 0.0327380952380952 drybarrel → x drybarrel ≈ 16.401785714285694 drybarrel
Conclusion:
501 usgallon ≈ 16.401785714285694 drybarrel

Conversion in the opposite direction
The inverse of the conversion factor is that 1 US dry barrel is equal to 0.0609689711486119 times 501 US gallons.
It can also be expressed as: 501 US gallons is equal to 1 / 0.0609689711486119 US dry barrels.
Approximation
An approximate numerical result would be: five hundred and one US gallons is about sixteen point three nine US dry barrels, or alternatively, a US dry barrel is about zero point zero six times five hundred and one US gallons.
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.