Enter your Garage Width, Height, Vehicle Width, and Vehicle Height — along with Door Style, Safety Clearance, and Available Headroom — and the Garage Door Size Calculator gives you the Recommended Door Width and Height, Side/Top Clearance, and Door Size Category.
Recommended Door Width
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Recommended Door Height
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Side Clearance
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Top Clearance
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Door Size Category
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Standard sectional garage doors require a minimum of 12 inches of headroom for proper track installation and operation. For doors with automatic openers, you may need 18-24 inches depending on the opener type.
Single garage doors are typically 8x7 feet or 9x7 feet. Double garage doors commonly measure 16x7 feet. However, custom sizes are available to fit specific garage openings and vehicle requirements.
It's recommended to have at least 6 inches of clearance on each side of your vehicle and 12 inches above. This allows for safe entry/exit and accounts for door swing and mirrors.
You can install a door up to the size of your garage opening, but structural modifications may be required for larger doors. Always ensure adequate headroom and side room for proper installation.
Roll-up doors require less headroom (typically 6-8 inches) compared to sectional doors (12+ inches) because they roll into a compact coil above the opening rather than following horizontal tracks.
Measure the width and height of the rough opening (not the door frame). Take measurements at multiple points as openings may not be perfectly square, and use the smallest measurements for door sizing.
Yes, it's wise to consider potential future vehicles. If you might upgrade to a larger SUV or truck, factor this into your door size selection to avoid costly modifications later.