This depends on the laws in the particular region where the unit is. Some states and cities have different building codes.
about 2 feet
check how much your feet is in mm or cm then plus that several of times to get to the other end of the door
Door come with different sizes. Considering that the question is about an average door used in modern house. Therefore, average dimensions are: 7 feet x 2 feet.
all depends on which door, internal doors may be 3 feet by 7 feet or 2.1M high
8 feet
The averaged width of a door is about 3 feet. This is the average door width for a door in a home.
A door could be that long.
about 2 feet
The standard dimensions for a patio door are typically 6 feet 8 inches in height and 6 feet to 8 feet in width.
Feet
check how much your feet is in mm or cm then plus that several of times to get to the other end of the door
The standard width of a garage door is typically 8 to 9 feet wide. A typical garage door is around 16 feet wide.
Get out. Get your feet and body off of the floor and get out of the door.
A stall door should be a minimum of 4 feet wide by 4 feet tall and a door frame or jam height of 7 to 8 feet tall at the minimum, bigger is better if you can afford it.
Door come with different sizes. Considering that the question is about an average door used in modern house. Therefore, average dimensions are: 7 feet x 2 feet.
all depends on which door, internal doors may be 3 feet by 7 feet or 2.1M high
The dimensions of the 72-inch door are 6 feet in height and 3 feet in width.