My point was that by the OP's use of Tapatalk - it's pretty safe to assume he's not new to the internets...And it's probably also safe to assume he's not new to internet forums. Thus, if he wanted meaningful answers to his question, perhaps things like stove type & size, hardwood/softwood use, moisture content, square footage, insulation quality/quantity, age of home, outside temperature and probably a dozen other variables should have/could have been stipulated.
But since they weren't stipulated, I'll play along. I can get 5 full days of burn time.
In my 2400 square foot 120 year old well insulated home, using 11 cubic feet of mixed hardwood at approximately 20% moisture content, in my P&M OWB, at 75 degrees F in July heating only my domestic hot water.