As of September 2015, the check-in weight limit for baggage is 50 pounds for internal American flights. Check-in weight limit for business class is 70 pounds.
American Airline calculates the size limit of baggage by calculating the outside dimension of each bag. By adding the length, width and height, each bag cannot exceed a total of 62 inches, regardless of cabin or ticket status. AAdvantage Gold and oneworld Ruby members get one bag checked for free, AAdvantage Platinum and onewold Sapphire members get two bags checked for free, and AAdvatage Executive Platinum and oneworld Emerald members get three bags checked for free. Active military personnel and dependants get up to five bags checked for free if the travel is for active duty or personal travel. If a bag is over the specified amount, the airline assesses an overweight fee, payable at the ticket counter.