Another factor that will shift this height is if you choose to use a double rod system in your closet.
Double rod closet height.
If installing a double rod closet system mount the top rod 81 inches above the floor.
Make this a full 80 1 4 inches above the ground which is high enough to hang two levels of clothing with 40 inches in between.
In a closet that has double closet rods the typical heights of the rods are between 38 40 inches to center from the floor on the lower rod and 76 80 inches to center from the floor on the upper closet rod.
Continue measuring up the wall to a height 84 inches.
This is the location for the bottom hanging rod.
Continue to allow about 24 inches of space from the rod to the back of the wall but increase the height of the top rod.
If you are installing dual rods in the closet the hanging measurements and spacing changes.
For a single rod closet the standard rod height is 66 5 inches.
For a double rod closet the standard height of the top rod is 81 75 inches from the floor and the standard height of the bottom rod is 40 5 inches.
In these cases the upper rod is usually installed at a height of 80 inches while the lower rod is positioned at 40 inches.
Double rod closets are intended to be used for hanging shirts and pants which are generally less than 40 inches long.