What is the Standard Size of a Patio Door?

Whether it's iced tea in the shade or evenings of laughter and barbecue, a patio can transform your outdoor living space. But finding the right patio door — one that fits both your home’s style and structural opening — is key. Knowing standard sizes and measuring correctly will help you make the best choice for your project.

From sliding to French styles, patio doors come in various forms and functionalities, each suited for different home layouts. Choosing the right door means balancing visual appeal, space considerations, and accurate units of measurements — whether you're using the imperial system or the metric system.

The standard size of a patio door with a 2-panel configuration is 6'8" x 6' (80" x 72"), or approximately 2032 mm x 1829 mm. They also come in 5' x 8' (1524 mm x 2438 mm) and 8' x 8' (2438 mm x 2438 mm).

Selecting a high-quality patio door isn’t just about looks — it also ensures durability, insulation, and smooth operation. When you search for energy-efficient glass or modern locks, it's important to start with the correct measurements. This ensures a good installation.

Standard Patio Door Sizes

Knowing the standard sliding glass door size for your home is essential before making a purchase. While custom options are available, most homes accommodate typical layouts based on sliding glass door dimensions commonly found in today’s builds.

Sliding Glass Doors

Sliding patio doors are popular in many homes. They create an easy flow between indoor and outdoor living. Their efficient design conserves space, offering wide views and plenty of natural light.

2-Panel

The most common patio door size. A 2-panel sliding glass door typically measures 6 feet 8 inches tall by 6 feet wide (80" x 72"), or about 2032 mm x 1829 mm. This standard works well for most modern homes. It provides a useful and roomy entry without using up floor space.

3-Panel

Ideal for larger spaces, 3-panel doors usually range from 9 to 12 feet wide (2743 mm to 3658 mm), with a typical height of 80 inches (2032 mm). People often use them in homes where they desire extra sunlight or visual openness.

4-Panel

Best suited for oversized patios or full-wall openings, 4-panel sliding doors can span up to 16 feet wide (4877 mm), maintaining a consistent height of around 80 inches (2032 mm). These doors offer wide views and help create an open, airy feel in big living spaces.

French Doors

French patio doors offer charm and a classic appearance. Whether in a living room or master bedroom, they deliver both elegance and functionality.

Single and Double Panel Options

• Single French door: A normal door size of about 36 inches wide by 80 inches tall, great for compact spaces.
• Double French doors: These often measure 72 inches wide total, with each door panel typically 36 inches. A big benefit is the wide opening and symmetrical style they bring to any room.

French doors usually swing outward or inward, so consider space constraints before selecting a size.

Custom Patio Door Sizes

If your opening doesn't fit a standard patio door size, custom doors are available. They’re crafted to your exact opening width, height, or length, allowing for non-typical proportions or unique layouts. Custom doors are ideal when replacing old models in historic or remodeled homes where dimensions vary.

How to Choose the Right Patio Door

Whether you're looking for clean lines or classic details, choosing the right patio door comes down to:

• measurements of your existing opening;
• design style: modern vs. traditional;
• frequency of use;
• exposure to the elements;
• your budget.

Sliding glass doors are excellent for space-saving layouts, while French doors add personality and architectural charm. Consider how tall or wide you need your door to be based on your furniture layout and wall size.

Measuring a Patio Door (Step-by-Step)

Getting the right dimensions starts with careful prep. Here’s how to measure your current opening for an easy installation.

Tools Needed

• Measuring tape (long enough to handle typical openings)
• Utility knife
• Pry bar or putty knife
• Safety gear
• Pencil and paper

Step 1: Remove Interior Trim

Use a knife or putty tool to gently remove the interior molding from around the door. This reveals the rough opening, which is what you’ll measure — not the existing door itself.

Step 2: Measure Width and Height

• Width: Measure from stud to stud inside the wall opening — top, middle, and bottom. Record the smallest number.
• Height: Measure from the top of the opening down to the subfloor. This gives you the full vertical dimension of the space.

These are your rough opening dimensions, and they’ll help determine if an average patio door size will work, or if you need a custom solution.

Step 3: Note Frame and Wall Thickness

Don’t forget to measure the depth from the interior drywall to the exterior sheathing. A proper jamb length ensures a snug fit, which improves energy efficiency and durability.

Rough Openings and Installation Considerations

Framing Requirements

Most door installations require a rough opening that's slightly bigger than the door itself — usually 1/2 to 1 inch wider and taller. This makes room for shims, insulation, and minor adjustments.

Cost Factors by Size and Type

A big door doesn’t just bring more light — it can also mean a higher price. Costs vary depending on:

• Size (width, height, and length)
• Door type (sliding or French)
• Glass and frame materials
• Labor and structural adjustments

FAQs About Patio Door Sizes

• What is the standard patio door size? The typical dimensions are 72 inches wide by 80 inches tall for a 2-panel sliding glass door.
• Can I install a 6-foot door? Yes, 6 feet is one of the most common patio door sizes and fits most openings.
• What’s the size of an average patio door? The average patio door size ranges between 5 to 8 feet in width, with a normal height of about 80 inches.
• Should I go with a sliding or French door? It depends on your space and style. Sliding glass doors are great for saving space. French doors offer a tall, elegant look with classic appeal.
• Can I replace French doors with a slider? Yes, but you may need to adjust the wall framing depending on the width and height of the new door. Always consult a professional.

Professional Help with Patio Door Measurement & Installation

While measuring and installing a patio door may seem doable, it’s a project that can get costly if done wrong. An improperly sized or poorly installed door can cause drafts, leaks, or structural issues.

At Feldco, we take care of everything. We measure your rough opening and install using top-quality tools. Whether you're looking for a standard size or a custom fit, our team is ready to help.

Get started today with a free quote from a Feldco product specialist, and make your home more functional and beautiful with a new patio door that fits just right.