I would suggest build from the ground up.
All stats named the same are the same , WIS = POW, Size - determine from the characters described size, or roll 2d6+6, or take an average of STR and CON.
Persistance = 10 + POW + (5 x base will save bonus)
Resilience = Con + POW + (5 x base Fortitude save bonus)
Dodge = Dex +10 - SIZ + (5 base Reflex bonus)
All skills known by character at Base + (5 x skill ranks) (find a fair equivalent)
Combat skills - all weapons regularly used by the character have a skill of
Str + Dex (or just Dex for missile/martial arts) + 10 x Base attack bonus. If the character has shield proficiency give them the same bonus.
Feats - give them an attuned Rune for each feat they know , ideally a relevant rune to the feat. If really powerful, look at legendary abilities.
Spells and extraordinary abilities- will need to be carefully worked out depending on class, but thats beyond the scope of a fast and dirty conversion like this.