Whether you’re upgrading a worn-out awning or outfitting a brand-new road-ready rig, getting the right measurement is essential for fit, functionality, safety, and longevity. In this guide, we’ll show you how to measure an RV awning or camper awning accurately so you can shop with confidence and avoid costly mistakes.
Why Choosing the Right RV Awning Size Matters
Getting the size wrong might seem minor, but it can lead to serious issues on the road and at the campsite.
Common Mistakes to Avoid
Measuring fabric instead of center of arm to center of arm arm-to-arm: Many manufacturers size awnings based on the distance between the mounting arms, not the fabric width, as fabrics can shrink or lose their shape over time.
Ignoring obstructions: Exterior lights, vents, and slide-outs can interfere with installation and must be accounted for. Awning arm installation requires a flat, unobstructed mounting surface.
Assuming all RVs use the same measurements. Motorhomes, campers, and trailers often require slightly different measuring techniques.
How Size Impacts Shade, Protection, and Usability
The size of your awning affects how much coverage you get for outdoor living. A properly sized awning provides sun and rain protection and also expands your usable space to make your RV feel more like home.
How to Measure for Your RV Awning
Measuring your RV or camper for a new or replacement awning is simple if you follow a clear, step-by-step approach.
Step-by-Step Guide for Measuring New and Replacement Awnings
Locate the Mounting Points on Your RV
Find the two vertical awning arms attached to the side of your RV. You’ll measure from the center of one arm to the center of the other—this is your “arm-to-arm” distance.
Measure Arm-to-Arm and Fabric Coverage
Use a metal measuring tape for precision.
Measure straight across the side of the RV, not along the curve of the body.
Record the distance in inches or feet, depending on your manufacturer’s preferences.
Slide-Out Awning Measurement Tips
For slide-out covers:
Measure the flange to flange length of the slide-out itself, not the awning arms, fabric, or roof of the slide-out room.
Add an extra 2.5 to 5 inches on each side for full coverage and retraction.
Double-Check for Accuracy and Obstructions
Measure twice and look for any clearance issues around:
Exterior speakers
Porch lights
Storage compartments
Window or door frames
How Camper and Trailer Measurements Differ
Travel trailers and pop-up campers often have different awning mounting locations and arm configurations. Instead of fixed arms, they may use horizontal rails or brackets, so be sure to measure the full mounting rail length, not just where the fabric ends.
Common RV Awning Size by Awning Type
Knowing what sizes are standard can help you compare products more easily.
Motorhome Awnings
Typical sizes of motorhome awnings range from 10 to 21 feet in width. Longer motorhomes may use dual awnings or side-by-side extensions for maximum coverage.
Travel Trailer and Camper Awnings
Travel trailer awnings and camper awnings usually fall between 8 and 18 feet, depending on the length of the trailer and door placement.
Slideout and Companion Awning Dimensions
Slide-out awnings usually measure slightly wider than the slide itself, with sizes starting at 5 feet and up. Companion awnings that pair with main canopies for additional shade tend to match or slightly undercut the main awning’s width.
How to Choose the Right RV Awning
Once you’ve measured your rig, it’s time to decide which awning suits your travel style, climate, and rig type.
Examples Based on Vehicle Type
Class A Motorhome: 18-21 feet for full-length coverage
Class C RV: 14-16 feet is usually ideal
Fifth Wheel Trailer: 15-18 feet, depending on slide-outs
Pop-Up Camper: 8-12 feet with lightweight arms or bag-style awnings
Tips for Ensuring Compatibility with Mounting Points
Verify your bracket spacing and mounting height before buying.
Look at the awning arm style. Certain automatic or electric models have specific mounting requirements.
Always consult your awning manufacturer or RV dealer when in doubt.
When to Replace or Resize Your RV Awning
There are several situations when replacing or resizing your awning makes sense.
Fitting New Awnings to Existing Hardware
If your current arms and brackets are still in good shape, you may be able to replace the awning fabric only. You’ll just need to make sure to match the exact dimensions of the old material.
Upgrading to a Larger or Smaller Coverage Area
Want more shade? Consider increasing your awning size, if space allows.Downsizing? Choose a more compact model that retracts cleanly and stores easily, especially useful for off-grid or boondocking setups.
Get the Right RV Awning the First Time
Measuring correctly is the first step to transforming your RV exterior. A well-fitted awning adds comfort, style, and function. At Carefree of Colorado, we help RVers make confident choices with awnings that combine durability, innovation, and easy installation.Explore our precision-engineered awnings and accessories to find your perfect fit.
FAQ
How Do I Know What Size Awning I Need for My Camper?
Measure the center of one awning arm to the center of the other. Do not measure the fabric itself. Compare this distance to the manufacturer’s sizing charts to determine the correct size.
What if I Measured My RV Awning Wrong?
We make your awning based on the information you provide us, so measuring correctly is very important. Since each order is made custom, we do not accept returns on RV Awnings based on exact dimensions, colors, and upgrade options. If you are not sure, we recommend having a professional measure to make sure it’s the right fit. Our awnings and replacement fabrics have a tolerance of + or – 1 inch, giving slight padding in exact measurements if measurements are just slightly off.
Can I Customize the Awning Size for My RV?
At Carefree, we offer various customizable options when it comes to outfitting your RV awning. While standard sizes and colors offer a quicker turnaround, if you want to customize and load your awning with options, we can provide just about any configuration!
