Not that I'm aware off.
It's pretty easy to convert though.
Basically think of each triplet (owner is a triplet, group is a triplet and anonymous is a triplet) as an octal number. Then in the triplet you have either a -
or one of r, w or x
. Think of a -
as being a zero and a r, w or x
as being a 1.
Lastly, in the triplet, each position represents 421 in that order (so r is a 4, w is a 2 and x is a 1); so rwxrwxrwx is basically 421421421 - to convert to the decimal representation you just add the elements of each triplet.
Thus a listing like rwxr-xr-x translates into a 755. Kinda tricky but you'll get the hang of it