Q: What Is a Standard Door Size?

A: A standard door size is often about 80 in tall and 30 – 36 in wide for homes, with exterior doors commonly 36 × 80 in, though sizes vary by room and region.

Focusing specifically on entry doors? See our Front Door Sizes Guide for material-specific sizing advice and factors that affect your choice.

Standard Interior Door Sizes (Residential)

When people ask, “What is a standard door size?” they are usually talking about interior residential doors. Most homes follow common dimensions to make installation easier and keep costs lower.

Typical Interior Door Widths

Standard interior door widths usually include:

• 24 inches – Often used for small bathrooms or closets

• 28 inches – Common in older homes

• 30 inches – Popular for bedrooms

• 32 inches – Comfortable for main living areas

• 36 inches – Used where wider access is needed

Wider doors improve accessibility and make moving furniture easier.

Standard Interior Door Height

The most common height is 80 inches (6 feet 8 inches).
Some newer homes may use taller doors like 84″ or 96″ for a more modern look, but 80″ remains the standard in most residential construction.

Standard Interior Door Thickness

Most passage doors are 1⅜ inches thick.
This thickness works well for bedrooms, bathrooms, and closets. It keeps doors lightweight while still providing durability.

Common Door Sizes by Room

Different rooms often follow typical size patterns:

• Bedrooms: 30″ or 32″ wide

• Bathrooms: 28″ or 30″ wide

• Closets: 24″ to 30″ wide

Choosing the right width depends on layout, furniture movement, and accessibility needs.

Standard Exterior Door Sizes

Exterior doors are usually larger and thicker than interior doors because they provide security and weather protection.

Most Common Exterior Door Size

The standard front door size in many homes is:

36 inches wide × 80 inches tall

This size offers comfortable entry access and meets common building requirements.

Wider or Taller Options

For grand entrances or custom homes, you may see:

• 42-inch wide doors

• 84-inch (7-foot) height

• 96-inch (8-foot) height

Taller doors create a dramatic, modern appearance.

Standard Exterior Door Thickness

Exterior doors are typically 1¾ inches thick.
This added thickness improves strength, insulation, and security compared to interior doors.

Front Door Sizes: Guide to Standard & Custom Fit

Commercial Door Size Basics

When talking about standard door size, commercial buildings follow slightly different rules than homes. Commercial doors must meet safety, accessibility, and durability requirements. That’s why their dimensions are often larger and more regulated.

Typical Commercial Door Sizes

The most common commercial door size is:

36 inches wide × 80 inches tall

However, many commercial spaces use wider or taller doors depending on traffic flow and building type. In busy offices, retail stores, and public buildings, doors may be 42 inches wide or more to improve access.

Minimum Clear Opening Width

Building codes often require a minimum clear opening width of 32 inches.
This ensures accessibility for wheelchairs and meets ADA (Americans with Disabilities Act) standards in the United States.

To achieve a 32-inch clear opening, most commercial doors are installed at 36 inches wide. The extra width accounts for hinges and frame space.

Specialty Commercial Door Sizes

Certain industries require special door dimensions:

• Healthcare facilities may use wider doors for hospital beds and equipment

• Schools and public buildings often install heavy-duty doors for high traffic

• Industrial buildings may require oversized doors for carts or machinery

Commercial doors are also thicker than residential doors—typically 1¾ inches or more—for added strength and fire resistance.

Quick Reference Charts

International Variations in Standard Door Sizes

When asking, “What is a standard door size?” the answer depends on where you are in the world. Door dimensions vary by country due to building codes, construction habits, and accessibility standards.

United States

In the U.S., standard residential doors typically measure:

• Interior height: 80 inches (6′8″)

• Common widths: 24″–36″

• Exterior doors: Often 36″ × 80″

Measurements are usually in inches.

Australia & New Zealand

In Australia and New Zealand, doors are typically measured in millimeters. A common internal door size is:

• 2040 mm high × 820 mm wide

These slightly taller doors are common in modern builds.

United Kingdom & Europe

Many European countries use metric sizing with variations such as:

• 1981 mm × 762 mm (UK common size)

• Other metric widths from 726 mm to 926 mm

Older buildings may have smaller doors, while new construction often uses wider openings for accessibility.

Choosing the Right Door Size

Selecting the right standard door size is not just about fitting an opening. It affects comfort, accessibility, and long-term usability.

1. Measure the Rough Opening

Always measure the rough opening, not just the old door panel. This ensures the new door fits properly within the frame.

2. Consider Accessibility

Wider doors—such as 32″ or 36″—improve mobility and meet accessibility requirements in many regions. If space allows, wider doors add long-term value.

3. Match Function to Size

• Bedrooms: 30″–32″

• Bathrooms: 28″–30″

• Closets: 24″–30″

• Entry doors: 36″ recommended

Choose based on traffic flow and furniture movement needs.

4. Think About Future Needs

If you’re building new, slightly wider or taller doors can make a home feel more modern and adaptable. Taller doors (84″ or 96″) create a premium look.

Ready to Choose the Right Standard Door Size?

Whether you’re building a new home, renovating a property, or planning a commercial project, choosing the correct standard door size makes installation smoother and prevents costly mistakes.

Our team can help you select the right door dimensions based on your country’s building codes, room function, and design goals. From residential interiors to commercial entry systems, we provide practical guidance and tailored solutions.

Contact us today to get expert advice and find the perfect door size for your project.

FAQs

1. What is the size of a standard door?

A typical standard door in the U.S. is about 30″–36″ wide and 80″ tall. Interior doors are often 30″–36″ wide; exterior doors are commonly 36″×80″.

2. Is a 32-inch door actual 32 inches?

A “32-inch door” refers to the nominal width of the door panel. The actual clear opening is slightly less after accounting for hinges and frame, but the panel itself is roughly 32 inches wide.

3. Is every door 6 ft?

No. Not every door is 6 ft tall. In the UK, a common internal door height is around 6 ft 6 in (1981 mm). In the U.S., many interior doors are 80 in (6 ft 8 in) tall.

4. What is a standard door size in the UK?

In the UK, a common internal door size is about 1981 mm (6 ft 6 in) tall × 762 mm (30 in) wide in England and Wales. In Scotland, slightly different sizes like 1981 × 726 mm are often used.