Door sizes
Standard Garage Door Sizes
Clopay names common single doors as 8 or 9 ft wide by 7 ft high, and a common double door as 16 ft wide by 7 ft high. Other widths and heights are offered in chosen models. Measure the finished opening and clearances; a common size label does not prove that a chosen door system fits.
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Last updated October 14, 2026
Standard garage door sizes help you show an opening, but the finished measurements decide the order. A garage that holds two cars may have one wide door or two narrow doors. Record the width and height of each opening. Then check the space beside and above, plus behind it.
Clopay names common single doors as 8 or 9 ft wide by 7 ft high, and a common double door as 16 ft wide by 7 ft high. Other widths and heights are offered in chosen models. Measure the finished opening and clearances; a common size label does not prove that a chosen door system fits.
Clopay's installation-planning guidance and homeowner FAQ inform the size discussion. These measurements help plan a purchase; they are not a door-fitting procedure.
Standard garage door sizes: reference table
| Opening description | Common example | What it does not show |
|---|---|---|
| Single-width | 8 x 7 ft or 9 x 7 ft | Vehicle clearance or track fit |
| Double-width | 16 x 7 ft | The chosen model's full rules |
| Taller or other width | Model-exact choice | Availability or approval for every build |
| Two single openings | Measure each on its own | The price or scope of one double assembly |
The examples are width by height. The first measure is not garage floor depth. A door opening also differs from the internal parking space. Check the space for the vehicle's mirrors and roof load too. Door size and parking space are different measures.
Measure the finished opening
From a safe position, note the opening's finished width and height. Keep the units consistent and label both measures. If trim or finishing work will change the opening, record that on its own. Do not substitute an old door's collection name or the garage's stated car capacity for measurements.
For a door that is damaged or unstable, do not operate it just to obtain a measure. Stay clear of springs and loaded brackets. The installer can show the final ordering measurements and safe access as part of the work scope.
Check each opening independently when replacing two doors. They may look equal without having identical finished size. A measured difference can affect the chosen order. Keep distinct labels so an installer knows which opening each set of notes shows.
Headroom, side room and backroom
Headroom is the space above the opening to the lowest obstruction. Side room is the offered space beside the opening. Backroom is the depth offered for the door's travel and system. These are fitting measurements, not spare parking size.
Clopay's FAQ lists differing clearance needs for spring arrangements and notes that an opener can need extra headroom. Those figures are model and system guidance, not a rule for every brand. Use the chosen model's fitting record. Check the full system. A general clearance does not apply to every door.
Note pipes and beams, plus ceiling storage that may interfere with travel or mounting. Take photographs from a safe stationary position if they help show the area. Do not remove a support or shift a loaded track to create room. Any building or hardware change needs a defined fitting scope.
Standard size versus custom order
Clopay's FAQ lists standard widths from 8 to 18 ft, including several intermediate choices. It also shows model-specific custom widths. A listed width does not mean every build and finish or rated assembly is offered in that size.
If the model does not fit the measured opening, compare another model. A custom order also needs a defined scope. Enlarging an opening is a building project; it is not the same as fitting a new door of the existing size. Do not treat a custom-size cost allowance as including structural work.
Keep order lead time distinct from the fitting appointment. Availability of a common measure is a supplier question. This guide makes no claim that a door is in stock or that a replacement can be completed by an exact date.
Translate the size into a budget
Read the single-car cost guide for one narrow opening. For a wide opening, use two-car replacement costs. The 16 x 7 installed-price guide explains the limits of exact-size pricing from national bands.
The replacement calculator uses measured choices to name a width class. It does not claim every listed measure has the same quoted price. A material band with size unspecified remains a broad allowance. Custom or unclear size stay unpriced.
DASMA safety tips explain that track and door sections work as a system. Size alone does not authorize track reuse, spring choice or opener fit. Those items must belong to the real assembly in the written fitting scope.
FAQ
Does a two-car garage always use a double door?
No. It can have one wide opening or two distinct narrow openings. Measure the existing layout before budgeting. Each narrow opening can need its own door system and opener. Converting the layout can involve building work and is a distinct scope from replacing the doors within the existing finished openings.
Can I order from the old door's label?
The label can help name the model, but it does not replace finished-opening and clearance measurements. Keep the model details with your notes and have the installer check the order. A newer build can have distinct track, hardware or clearance needs even when the stated width and height match the old door.
Standard garage door sizes Verdict
Use standard garage door sizes as reference labels. Measure each finished opening, then check the chosen system's clearances. Keep changes to the building distinct from replacement fitting. A well-labeled measurement sheet is more useful than guessing the door size from the number of cars inside.