What is the standard height of a door?

The standard height of a door is typically considered to be 7 feet (2.1 meters). This measurement is commonly used in residential buildings and many commercial spaces. The reason for this standard height is to ensure adequate headroom and comfort for occupants while also accommodating the majority of residents. A 7-foot door allows for ample clearance for most people, making it practical and functional in a variety of settings.

While other heights for doors can exist, such as 6 feet or even 8 feet, these are often considered variations or specialized sizes rather than the standard. Variations might be used depending on specific architectural designs, but 7 feet remains the widely accepted norm. The choices of 8 feet and 9 feet are less common and typically reserved for grand entrances or specific aesthetic choices in high ceilings.