Measure your existing door knobs from the floor up.
Standard size for exterior door handle.
96 inches or 8 ft.
Stock exterior doors are also commonly available in 30 inch and 32 inch widths.
General requirements for access recommends that the height of the handle should fall within 900mm and 1100mm above the floor.
Over the years front door handles for wooden doors have tended to keep to a standard lever to lock size.
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.
This makes the changing of exterior door handles easy enough for most people to do.
This creates a more harmonious appearance.
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.
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.
In most cases the door set which is inside of the door and controls the door latch.
Measure from the center of the door knob hole to the edge of the doorway to find the size of the door set.
It is more important that your door handles be consistent than that they match the standard door handle height.
Standard door handle height.
Is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32 inch widths.
In metric terms this size is 57mm.
Some door manufacturers sell doors in 7ft 8ft heights and door widths from 24 inches to 42 inches.