im trying to "see how secure my passwords are"
You would be better to look at existing password crackers.
In most cases the hacker does not have to find the exact password he only has to find a password that generates the same hash as your actual password.
As passwords are often words, perhaps with numbers substituting for some characters, cracking is often done by pre-generating hashes for words from dictionaries. Those hashes are then compared with the hash of the real password. You should also lookup Rainbow Tables which are not dictionary based.