Regulation Dartboard Heights and Measurements
Dart Board Height- The center of the bullseye should be exactly 5 Feet 8 Inches from the floor.
Diagonal Distance- If you do the first two steps correctly the diagonal distance from the center of the bullseye to the throw line will be 9 feet 7 3/8".
Other things to remember: Most dart boards are about 1 1/2" thick, so be sure to measure from the front of the board and not the wall. Also be sure to consider the area you will be mounting the dartboard, you will need some decent lighting and a couple of extra feet behind the throw line to allow for the back leg to stretch out. Be sure to install some type of backboard or cabinet to go with the board, everyone misses on occasion and you never know what level of player will show up to throw some darts.