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