Camper Bathtub Sizes: Finding the Right Fit

Camper bathtubs usually measure 24 inches wide and 36 to 46 inches long, a footprint far smaller than a standard home tub.

Most replacement tubs for RVs and campers land on one of a few standard footprints, and knowing those numbers before you start measuring saves a wasted purchase. The typical full-size RV tub runs 36 to 46 inches long and 24 inches wide, while a standard home bathtub stretches 60 to 72 inches. That difference matters because the cutout in your camper’s bathroom was built around a much tighter space.

The real challenge isn’t the overall length, though. Drain placement, overall height, lip dimensions, and how the tub meets your shower surround all decide whether a replacement actually fits.

What Size Is a Standard RV Bathtub?

The most common camper bathtub sizes are 24″ x 36″, 24″ x 40″, and 24″ x 46″, with a compact 24″ x 32″ option also available. Almost all of these share the same 24-inch width, which makes the length the primary variable you’ll shop by.

Width is fairly consistent across the market because RV bathroom walls rarely allow more than 24 inches. Length depends on the floor plan and where the tub sits. A short 32-inch tub suits a small camper van bathroom, while a 46-inch tub approaches the feel of a home unit without actually reaching it.

A few measured examples give a clearer picture of what you’re working with:

• A 40″ x 24″ tub: 40″ long, 24″ wide, 13 5/8″ overall height, 2″ drain height, 1.5″ drain diameter.
• A 36″ x 24″ center drain tub: 36″ long, 24″ wide, 13 5/8″ overall height, with the drain centered.
• A 46″ x 24″ tub with 12″ depth for longer bathroom layouts.
• A compact 24″ x 32″ tub with 11.5″ depth and a left-hand drain.

How to Measure for the Right Fit

Before you order anything, measure the existing tub or pan with the drain position identified first, then check the width from the back wall to the outer front edge, and the length from left to right. That sequence matters because drain location is the detail people most often skip.

RV tubs come in right-hand, left-hand, and center drain configurations, and swapping from one to another rarely works without moving plumbing. The drain hole position must line up with your existing P-trap, or you’re looking at a much bigger job than a simple tub swap.

One more measurement trap: the listed size is often not the usable interior size. A 40″ x 24″ tub, for instance, has been reported by users to offer an interior space closer to 34″ x 18″ x 13″ deep. The exterior footprint and the rim take up several inches on every side, so if you’re buying based on interior room for washing, measure the inside of your current tub rather than its outer edges.

Wall Clearance and Surround Compatibility

A replacement tub needs to fit not just the floor cutout but also the shower surround and wall opening around it. The surround must match the tub’s rim and lip dimensions, and the tub’s overall height has to line up with your existing wall panels.

Check three things before purchase:

• Overall height: A shallow replacement tub, sometimes 10.5″ deep, may sit noticeably lower than your current one, leaving a gap at the wall.
• Rim and lip height: The 1 1/2″ lip on many models must meet the surround’s bottom edge cleanly to keep water off the floor.
• Wall opening: The surround itself must match the new tub’s dimensions; a 36″ tub in a 40″ opening leaves an exposed seam.

When the dimensions line up on paper but you’re still unsure, a tub surround sold as a matched set with the tub removes most of the guesswork. Some manufacturers offer a 24″ x 36″ right-hand drain tub with its own matching surround at 36″ x 24″ x 59″, which is the safest route for a first-time replacement.

Camper Bathtub Sizes and Replacement Cost

Most RV-specific tubs are molded from ABS plastic, which keeps them light enough for travel and resistant to the flexing a moving vehicle produces. They’re also sized deliberately for tighter spaces, with shallower depths and smaller footprints than home units.

If you’re weighing whether to replace your tub or upgrade the whole bathing setup, our tested roundup of the best bathtubs for campers covers models that balance comfort with a practical fit. That comparison walks through depth, drain configuration, and which units suit different RV floor plans.

Getting the fit right on the first try comes down to three numbers you can verify in ten minutes: length, width, and drain position. Measure those against your existing plumbing and wall opening, and the right 24-inch-wide tub is straightforward to find.