🚪 Garage Door Size Calculator
Find the perfect garage door dimensions for your vehicle and space — single, double, or custom
| Door Type | Min Headroom | Side Room (ea side) | Min Backroom | Notes |
|---|---|---|---|---|
| Sectional (Standard) | 10–12 in | 3.75 in | Door height + 18 in | Most common type |
| Sectional (Low Headroom) | 4.5–6 in | 3.75 in | Door height + 18 in | Special hardware needed |
| Roll-Up (Coiling) | 12–18 in | 4 in | 18 in | Drum coils above opening |
| Swing-Out / Carriage | 6 in | 12 in (swing clearance) | N/A | Swings out, no track |
| Slide-to-Side | 8 in | Door width + 6 in | Door width + 6 in | Slides parallel to wall |
| Tilt-Up (One-Piece) | 14–16 in | 4 in | Door height + 24 in | Older style |
| Vehicle Type | Typical Width | Typical Height | Rec. Door Width | Rec. Door Height |
|---|---|---|---|---|
| Compact / Sedan | 5.5–6.0 ft | 4.5–5.0 ft | 8–9 ft | 7 ft |
| Midsize SUV | 6.0–6.5 ft | 5.5–6.0 ft | 9–10 ft | 7–8 ft |
| Full-Size SUV / Pickup | 6.5–7.0 ft | 6.0–6.5 ft | 10 ft | 8 ft |
| Full-Size Van | 6.5–7.0 ft | 6.5–7.5 ft | 10 ft | 8–9 ft |
| Boat on Trailer | 7.0–8.5 ft | 7.0–9.0 ft | 10–12 ft | 9–10 ft |
| Class A Motorhome (RV) | 8.0–8.5 ft | 12–13 ft | 12 ft | 13–14 ft |
| Class C RV | 7.5–8.0 ft | 10–11.5 ft | 10–12 ft | 11–12 ft |
| Golf Cart / ATV | 4.0–5.0 ft | 5.0–6.0 ft | 7–8 ft | 7 ft |
| Configuration | Door Width | Door Height | Metric (W) | Metric (H) |
|---|---|---|---|---|
| 1-Car, Sedan | 9 ft | 7 ft | 2.74 m | 2.13 m |
| 1-Car, SUV | 10 ft | 8 ft | 3.05 m | 2.44 m |
| 2-Car, Standard | 16 ft | 7 ft | 4.88 m | 2.13 m |
| 2-Car, SUV/Truck | 18 ft | 8 ft | 5.49 m | 2.44 m |
| 3-Car, Standard | 24 ft | 7 ft | 7.32 m | 2.13 m |
| RV / Oversized | 12 ft | 12 ft | 3.66 m | 3.66 m |
| Commercial / Shop | 20 ft | 10 ft | 6.10 m | 3.05 m |
| Tandem (Deep) 2-Car | 16 ft | 8 ft | 4.88 m | 2.44 m |
| Insulation Level | R-Value Range | Typical Thickness | Best For |
|---|---|---|---|
| Non-Insulated | R-0 | N/A | Unheated, storage only |
| Basic | R-6 to R-9 | 1–1.5 in polystyrene | Mild climates, occasional use |
| Standard | R-13 to R-16 | 2 in polyurethane | Most residential garages |
| Premium | R-18 to R-32 | 2.5–4 in polyurethane | Heated garage / living space |
Picking the right Size for a Garage Door is more important than many folks think. Those standard sizes formed over years based on building custom, when cars evolved and homeowners needed something practical for everyday use. There truly is good reason for all those particular numbers.
For a garage with one car, usually you have three main options: 8 feet wide and 7 feet high, 9 feet wide and 7 feet high, or 10 feet wide and 7 feet high. Each of them fits a car, small truck or van, without too much trouble. The 9×7 is most common in new houses.
Pick the Right Garage Door Size
Even so, choosing 9 or 10 feet wide you can easily fit everyday vehicles, although it simply needs a bit more space.
If you need room for two cars, folks commonly choose 16 feet wide and 7 feet high, or 16 feet wide and 8 feet high. There is also an 18-foot version, if you want that. Those standard heights stay at 7 or 8 feet.
A taller door is useful, when you commonly lay objects on the roof of your truck or SUV, for instance a canoe on a rack or roof carriers.
The widths of home Garage Doors range a lot, from 8 feet up to even 20 feet. That is a big range. Most makers offer home models between 8 and 16 feet wide.
The heights start at 6 feet 6 inches and go up form here.
Garages for RV vehicles are a whole other case. Here you need doors around 10 to 12 feet wide and 12 to 14 feet high. Some large models go up to 14 feet wide and 16 feet high.
For easy parking of such big vehicles, the height can be 12 feet or more.
Also the depth of the garage matters a lot. A Ford F-150 Supercab is a bit more than 21 feet long. If your garage has only 20 feet of depth, that truck does not enter easily.
A 12×20-foot garage is popular (it fits bigger vehicles), but leaves space to walk and open car doors, without touching the walls. For two cars, a 24×24-foot garage is commonly seen as the smallest real Size.
When it comes time to change your Garage Door, exact measures are needed. The door itself needs enough space, along with room for the moving parts that move it. You will want at least one foot of clearance above the door.
If the clearance is small, a fast turning system on the rail can help, although it costs between 75 and 80 dollars. Door sections come in 18-inch, 21-inch and 24-inch heights. From there, the sizes go up in 3 inches, starting at 6 feet 6 inches.
Building new? The Size of the door depends simply on what youcan fit inside.
