Lethal dosage of hydrocodone?

I have 5/500 mg hydrocodone pills. I dont know if thats a lot but it doesnt seem like a lot, but i just want to know what the lethal dose would be if i'm female 13, 5'3, 90lbs. one doesnt do anything but like i said 5/500 doesnt seem like very much (but i dont know) i've never taken more then one because i dont wanna OD or anything, thats why im asking. it'd be a big help to answer:)