In July, my last dependent turned 26 and had to get his own healthcare plan.  I have not yet contributed to my HSA this year and was wondering if I could still contribute $4,850.00/12*5+$8,750.00/12*7 or if my contribution would be limited to $4,850.00.

I'm 61, so my limits include the $1k catchup.  The math is seven months with the family limit plus five with the individual limit.