The convertible hand truck and chair device may combine the advantages of a wheeled hand truck with the advantages of a folding chair. Such a design may allow a user to transport large or heavy items from one location to another using the hand truck, and to then utilize the hand truck as a chair device for sitting. By way of example, a user going to the beach or a camp site may carry most or all of their needed items, such as coolers, foodstuffs, and other goods, to the beach or camp site location, and then convert the hand truck to a seat where they may sit or rest without the need to bring an additional chair. The device may further collapse down into a compact form factor for ease of transportation.