Hinge Heights On Internal Doors

For a pre hung door measure the width and height of the slab the rough opening space between the studs with no door installed and the thickness of the jamb.
Hinge heights on internal doors. Standard interior door height is 80 inches. Doors over 60 inches but not over 90 inches need to use 3 hinges. An 80 inch door is called a 6 8 door pronounced six eight. The upper hinge is 7 from top of door to top of hinge the bottom hinge is 9 from the floor.
This is the most common height for passage doors that lead from one room to another. Doors over 90 inches but not over 120 inches 4 hinges are recommended. All 4 1 2 and 5 butt hinge spacing. Doors up to 60 inches need 2 hinges.
Standard widths for interior doors are 24 28 30 32 and 36 inches while the height must be a minimum of 80 inches. For a standard internal door its door lock is normally 42 from the floor to the centre of the latch. Opening heights 5 0 through 7 6 one and one half pair butt hinges from under head cl 9 3 4 top of door 9 5 8. Referring to door height.
Opening heights 3 0 through 4 11 15 16 one pair butt hinges from under head cl 9 3 4 top of door 9 5 8 from bottom of frame cl 10 3 8 bottom of door 9 5 8 2.