Standard Door Size In Feet | Main Door Size & Internal Door Size

A standard door size refers to a typical size of a door that is commonly used in construction and building projects. The standard size can vary depending on the location and purpose of the building, but certain dimensions are generally accepted as standard.

These dimensions are often used as a starting point for planning and designing doors in various settings, including residential, commercial, and industrial buildings.

In the United States, the standard door size is 80 inches in height and 32 to 36 inches in width, while the standard height for residential doors is usually 80 inches. These measurements are used as a guideline for builders and architects but can be adjusted to meet specific requirements.

Read More: 25 Types of Doors for Your Perfect Home

What Is Standard Door Size?

In the United States, two types of door sizes are mostly used for home interior and exterior doors. The standard size for internal and external doors are as follows,

Exterior Door Standard Size in inches = 80 Inch. (Height) x 42 Inches. (Width)

Interior Door Standard Size in inches = 80 Inch. (Height) x 36 Inches. (Width)

Exterior Door Standard Size in feet = 6 ft 8 In (Height) x 3 ft 6 In (Width)

Interior Door Standard Size in feet = 6 ft 8 In (Height) x 3 ft (Width)

Standard Size of Door Frame

The standard size is 6 ft 8 which does not include the size of the door frame. The door frame size is generally wider than the door opening. The door frame post has a width between 2 to 4 inches.

The total width of door frame = Width of door frame + width of door + width of the door frame

= 2″ + 36″ + 2″

Width of door frame = 40″

Similarly height of door frame = height of door + width of a door frame

= 6′ 8″ + 2″

Height of door frame = 6′ 10″

Therefore, the size of the door frame is 82″x40″

Standard Door Width

The door width is not fixed, it can vary depending on materials and uses. However, the most utilized standard internal door width is around 32″ and the external door width is 36″. The 32″ wide door is a minimum width required for any passenger passing door.

There are also narrow-width doors available in the market such as 30″, 28″, and 24″ wide doors.

If you choose a 36″ width door, it will comply with the Americans with Disabilities Act (ADA) and are a popular choice for homes whose residents have mobility issues.

Standard Door Height

The door height ranges from 80″ to 96″ depending on its purpose to serve. The taller door heights are selected for the big entrance of the hall or public building entrance.

In the United States, The standard door height is around 80″ (6 ft 8 inches).

In India, The standard door height is around 84″ ( 7 ft)

However, the door heights can be 96″ for custom doors and personal choice to have taller doors of own house.

Standard Door Height (Global Comparison)

Country	Standard Door Height
USA	80″ (6 ft 8 in)
India	84″ (7 ft)
UK	78″ (6 ft 6 in)
Custom Doors	Up to 96″ (8 ft)

Read More: What Is a Pocket Door | Pros & Cons of Pocket Doors | How to Install Pocket Doors

Internal Door Size In the UK

• 78″ x 18″ to 21″ – These sizes are mostly used for cupboards and wardrobes.
• 78″ x 24″ to 27″ – This size of the door is usually preferred where wall space is limited and for small door fitting work.
• 78″ x 30″ – It is also called a 2’6″ door and It is the most used size of door in England and Wales.

78″ x 33″- It is most suitable for wheelchair movement inside or outside. It is also called 2′ 9″ door size.

Standard Door Size in India

The standard size for various rooms, the entrance of schools, hospitals, halls, etc. are fixed by govt of India. The standard height and width of doors are recommended in IS code based on use, function, and movability requirements.

The standard door sizes in India is as follows

1. For Main entrance door = 36” x 84”, 42” x 84”, 48” x 84” , 36” x 96”

2. For Living room, hall, bedroom, etc = 36” x 84”, 36” x 96”

3. For Bathroom, Toilet = 30”x 84”, 33” x 84”

The following table shows the standard door size for different rooms,

Door Type	Sizes In Inches
1. Main Entrance Door	36” x 84”	42” x 84”	48” x 84”	36” x 96”
2. Living Room & Bedroom	32” x 84”	36” x 84”	42” x 84”
3. Bathroom & Toilet	30”x 84”	33” x 84”

Types of Doors and Their Standard Size

There are various types of doors used in building construction. In the case of residential construction, we can categorize them into two parts: external doors and internal doors.

The door in residential houses must have a standard size that proves to be economical while replacing it with a new door of the same size.

The building bylaws followed by the authority must consider the easy and comfortable movement of all members of society, including kids, seniors, tall people, and those with special needs.

A. Main Door Size

The entrance door is the main entry point of any house. It means everyone whether it is human or any object, furniture has to pass the door. Therefore entrance door must have sufficient width and height.

1. Single Entrance Door

A single main door can have the following sizes,

80 x 32″ (2,032 x 813 mm)

80″ x 30″ (2,032 x 762 mm)

80″ x 36″ (2,032 x 914 mm) – Most Prepared Size

80″ x 42″ (2,032 x 914 mm) – Most Prepared Size

However, some people want a taller front door that looks more attractive and impressive to visitors.

A Door Size 96″ x 36″ (2,438 mm) has now become popular among US homeowners.

3. Double Front

Single front doors are basic door types and old house owners used them. Single front doors are less costly compared to double front doors.

Even if they are affordable they look basic and they are not visually attractive or impressive in look. Single-entry doors are certainly the norm, yet they are quite basic compared to double-entry doors.

If you are thinking about buying new furniture, large electronics, or other big sizes items, a double door may better serve your needs.

The standard size of a double entrance door consists of two equal halve of the same height 80″ to 96″ and the width of the halves can vary depending on the width of the entrance owner want for his home.

• 80″ x 60″ which includes two wings of 30″ size each
• 80″ x 64″ which includes two wings of 32″ size each
• 80″ x 72″ which includes two wings of 36″ size each

B. Interior Door

The interior door is primly used for the in-house movement of a person or object. The bedroom, kitchen, balcony, bathroom, and toilet doors are considered interior doors.

The standard size of the interior door is as follows,

• 80″ x 28″
• 80″ 32″
• 80″ x 36″

The standard size of the interior double door is as follows,

• 80″ x 60″ (Two halve 30″ each)
• 80″ x 64″ (Two halve 30″ each)
• 80″ x 72″ (Two halve 30″ each)

Door Size In mm, Inches & Feet

Size in mm	Size in inches	Size in feet
1981 X 457	78″ X 18″	6’6″ X 1’6″
1981 X 533	78″ X 21″	6’6″ X 1’9″
1981 x 610	78″ X 24″	6’6″ X 2’0″
1981 x 686	78″ x 27″	6’6″ X 2’3″
1981 X 711	78″ X 28″	6’6″ X 2’4″
1981 X 762	78″ X 30″	6’6″ X 2’6″
1981 X 838	78″ X 33″	6’6″ X 2’9″
1981 X 915	78″ X 36″	6’6″ X 3’0″
1981 X 1067	78″ X 42″	6’6″ X 3’6″
1981 X 1168	78″ X 46″	6’6″ X 3’10”
1981 X 1220	78″ X 48″	6’6″ X 4’0″
1981 x 1372	78″ X 54″	6’6″ X 4’6″
1981 x 1524	78″ X 60″	6’6″ X 5’0″
2032 X 813	80″ x 32″	6’8″ X 28″
2134 X 915	84″ X 36″	7’0″ x 3’0″

FAQs:

1. What is the standard door size in feet?
The standard door size in India is typically 3 feet x 7 feet (width x height) for main doors, while internal room doors are usually 2.5 feet x 7 feet.

2. What is the standard door size in general (India vs international)?
In India, standard door size is commonly 3ft x 7ft for main entrances, while internationally (US/UK), standard interior doors are often 2.6ft x 6.8ft (80cm x 210cm approx.), with slight variations by building code.

3. What is a standard door size?
A standard door size refers to the commonly used width and height for doors in residential construction — typically 3ft wide x 7ft tall for main doors and 2.5ft x 7ft for internal doors, though sizes vary based on room type and local building codes.

4. What is the standard door height?
The standard door height is generally 7 feet (84 inches) for both main and internal doors in most residential buildings, though taller doors (7.5–8 ft) are increasingly used in modern designs.

5. What is the standard main door size?
The standard main door size is typically 3 feet (width) x 7 feet (height), though larger main doors of 3.5ft x 7ft or double-door designs (5-6 ft wide) are common in bigger homes for a grander entrance.

6. What is the standard main door size in feet?
In feet, the standard main door size is 3ft x 7ft, which converts to approximately 900mm x 2100mm — a size widely followed across Indian residential construction.

7. What is the standard door height in general?
Standard door height across most residential and commercial buildings is 7 feet (2100mm), though this can extend to 7.5-8 feet for premium or modern architectural designs.

8. What is the standard door size in cm?
The standard door size in cm is approximately 90cm x 210cm for main doors and 75cm x 210cm for internal room doors, following the common 3ft x 7ft and 2.5ft x 7ft conversions.

9. What is the standard door size in mm?
In millimeters, standard door size is approximately 900mm x 2100mm for main doors, and 750mm x 2100mm for internal doors — these are the typical dimensions used in architectural drawings and door frame manufacturing.

10. What is the standard door height in feet?
Standard door height in feet is 7 feet (84 inches) for most residential doors, which is the widely accepted default across Indian building standards (though it can vary slightly for bathroom or utility doors, sometimes 6.5 ft).

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