The door gap to the floor should be 5 8 to 3 4 inch.
Space between door and floor.
Gaps between door casing and laminate flooring are common and manufacturers have designed a wide variety of special pieces for this purpose.
A gap of 4 cm is allowed for convenient and safe door opening.
During installation of a frame and during the initial formation 1 2 cm gaps should be left for foaming.
The standard i use is 1 2 over finish floors 3 4 is acceptable.
Measure the distance between the door frames at the floor.
Between a leaf of interior doors and the floor it is required to leave a gap of at least 2 2 5 cm to provide natural ventilation.
Transfer this measurement to the threshold put on a pair of safety glasses and cut it to this length with a hacksaw or jigsaw.
I have never seen a door set with that big of a gap unless it was to get past floors that were not level.
If each room has individual air returns the numbers can be smaller for personal taste.
How to create gaps when installing interior doors.
Door clearance although this is a broad term it usually refers to the space between the top of the door and header rabbet or bottom of the door and finished floor.
This allows for proper air exchange between rooms.
That is a lot of room for unlevel you have there.
To fix the issue the doors need to be removed bottom of the jambs cut and reset the door.