How to Measure Camper for Cover? | Get the Right Fit First Time

Measure from the front bumper to the rear bumper (excluding the hitch), across the widest sidewall point, and from the ground to the roofline — then size up to the next cover range if you’re between sizes.

One wrong measurement turns a protective investment into a torn, flapping disappointment. The camper cover market runs on precise ranges, and guessing your RV’s size — or trusting the model number — is the fastest way to order a cover that either binds at the seams or leaves a panel exposed to the elements. Here’s how to measure a camper for a cover in three straightforward dimensions, plus the rule that saves most buyers from a return shipment.

What You Need Before Measuring

Grab a long tape measure (25 or 50 feet works best), a step ladder for tall trailers, and a notepad or phone to record numbers. A helper makes the length measurement far easier, but you can manage solo by anchoring the tape at one end. Measure only the closed travel position — never with tent sections, awnings, or roof extensions deployed.

The Three Dimensions That Matter

Length: Front Bumper to Rear Bumper

Start at the front face of the trailer body (the flat bumper area, not the hitch coupler) and run the tape to the very back. Include all permanent rear attachments: spare tires, ladders, rear storage racks, and bumpers. Exclude the hitch, tongue, propane tanks, and any roof extensions. If you own a travel trailer with a visible tongue, verify whether the cover you’re considering is designed to cover the tongue as well — if it is, include that length too.

Width: Widest Sidewall Point

Measure across the sidewall at its broadest section, from one side to the other. Exclude awnings arms, side mirrors, and slide-outs unless you’re buying a slide-out-specific cover. Most conventional travel trailers fall between 8 and 8.5 feet wide; teardrop and small campers range from 5 to 7 feet.

Height: Ground to Roofline

Measure from the ground to the top of the flat roof surface — not to the highest rooftop accessory. AC units, satellite dishes, solar panels, and roof vents should be excluded; the cover is designed to accommodate these without needing the inflated measurement. Adding them to your height number will lead to ordering a cover that fits poorly at the sidewalls.

The Size-Up Rule That Saves Your Cover

Cover sizing is sold in ranges: 22–24 feet, 24–27 feet, 28–31 feet, and so on. If your measured length falls at 23.9 feet, buy the 24–27 foot cover — not the 22–24. That extra inch or two of clearance prevents the cover from binding at the seams or stretching thin over the rear attachments. Most manufacturers explicitly warn that even one inch over the listed size requires the next larger option. The National RV Covers measurement guide emphasizes this rule as the most common sizing correction buyers need to make.

Three Mistakes That Lead to the Wrong Size

• Measuring from the hitch coupler: This adds several feet to the length, producing a cover that’s baggy at the front and won’t secure properly.
• Ignoring rear attachments: A spare tire or ladder that sticks past the rear bumper can poke through or tear a cover that’s too short.
• Following the RV model number: Manufacturer-stated lengths are often approximate and don’t account for added accessories or bumper variations — always measure your actual unit before you shop.

Once you have your three numbers recorded — length, width, and height — you’re ready to browse cover options with confidence. Our tested roundup of the best camper covers breaks down the brands that fit each size range, so you can match your measurements to a cover that actually lasts.