The regulation height for hanging a dartboard requires that the centre of the bull's eye should be 5 feet 8 inches above the floor.
Height of Players
The height of the dartboard is established based on the eye level of a player who is six feet tall. If you are hanging a dartboard for children who are all much shorter, you may want to take that into consideration and lower the centre of the board.
The height of your dartboard will depend entirely on its purpose. If the board is to be used by adults or for any regulated competitive event, you will want to comply with the standard height requirements. If your board is for a playroom for children, you can be flexible and base the height on the average eye level of the intended players.