How long will it take for a fractured hand to heal?

Six weeks on average: It depends on what bone in the hand is broken. A scaphoid fracture (the most commonly fractured bone in the carpus (wrist)) generally takes 10-12 weeks to heal, but a garden variety fracture of a metacarpal (the big bones in the palm of the hand) or of a phalanx (the little bones in the fingers) should heal in about six weeks. The healing could be slower in a smoker or a diabetic.

Depends: There are several different kinds of bones in the hand/wrist and depending on which bone it is it could take a few weeks to several months in some cases.