General requirements for access recommends that the height of the handle should fall within 900mm and 1100mm above the floor.
Standard size for exterior door handle.
In most cases the door set which is inside of the door and controls the door latch.
Regardless of the size of the door the australian standard as 1428 1 design for access and mobility part 1.
The standard size for an exterior door is 80 inches 6 feet 8 inches by 36 inches 3 feet.
This is around waist height for the average adult.
The standard size for an exterior door is 80 inches by 36 inches which is 6 ft 8 inches by 3 ft.
It is more important that your door handles be consistent than that they match the standard door handle height.
This creates a more harmonious appearance.
Standard door handle height.
You can check this by measuring from the centre of the spindle to the centre of the key hole.
Measure your existing door knobs from the floor up.
The standard door thickness is 1 inches.
Some door manufacturers sell doors in 7ft 8ft heights and door widths from 24 inches to 42 inches.
If they are more than inch off the standard height you will want to match all of the pre existing door handle heights in your home.
96 inches or 8 ft.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
Over the years front door handles for wooden doors have tended to keep to a standard lever to lock size.
Some door manufacturers carry stock doors in 7 foot and 8 foot heights and door widths from 24 inches to 42 inches.
In metric terms this size is 57mm.