What Size Is an RV Bunk Mattress?

On this page (9 sections)

1. What size is an RV bunk mattress in most campers?
2. How to measure an RV bunk for a new mattress
3. The three bunk sizes you'll see in real campers
4. How thick should an RV bunk mattress be?
5. Can you cut an RV bunk mattress to fit?
6. What about full-size bunks and larger platforms?
7. Why RV bunk sizes are not standardized
8. What else changes the fit besides width and length?
9. Which RV bunk mattress size should you order?

Most RV bunk mattresses measure 28 to 30 inches wide by 72 to 80 inches long, with 6 to 8 inches of thickness. That is narrower than a home twin, so the size you need depends on the bunk platform in your camper rather than a national standard.

RV makers build bunks to fit their own floor plans, which is why a mattress that fits one trailer can be too wide for another. The answer to what size is an RV bunk mattress starts with a tape measure and the actual platform inside your rig.

Measure first, then order. The three bunk mattresses below cover the common widths and lengths, and each one solves a different fit problem.

If your bunk takes a bigger mattress, our RV queen mattress size guide covers the 60 x 80 and 60 x 75 options.

What size is an RV bunk mattress in most campers?

The common RV bunk mattress is 28 to 30 inches wide and 72 to 80 inches long. These sizes fit the tight platforms along a trailer wall or over a garage, not a bedroom twin.

Width is where most buyers get caught. A standard twin is 38 x 75 inches, roughly 8 to 10 inches wider than a typical bunk, so it overhangs the edge, bows in the middle or blocks the ladder.

Length varies more than width. Some bunks take a 72-inch mattress, some a 75-inch, and a few stretch to 80 inches.

A 72-inch mattress on a 75-inch platform leaves a 3-inch gap at the foot, which is usually harmless.

Thickness runs 6 to 8 inches in most builds, and 6 inches is the practical floor for adult comfort. A mattress that is too thick won't sit down into a shallow tray, so check platform depth too.

Measure your platform before you trust any size chart, including the ones in this guide. The camper you own is the only authority on its bunk.

How to measure an RV bunk for a new mattress

Measure inside edge to inside edge on the platform, then measure upward to whatever sits above it. Those three numbers decide which mattress fits.

Start with width. Run the tape from the inner face of one side wall to the inner face of the other, at both the head and the foot end.

Bunks are often slightly trapezoidal, so use the smaller of the two readings. Then measure length the same way and check whether a lip, raised trim or head cabinet reduces usable length.

A mattress that presses into a corner cabinet will never sit flat.

Finally, measure the vertical clearance from the platform surface to the underside of the upper bunk, the cabinet or the roof panel. A 6-inch mattress needs at least that much space plus a little room to tuck in bedding.

Write the numbers down as width x length x maximum thickness. Round width and length down to the nearest inch, not up, so the mattress slides in without force.

Take the measurements to the store, not the other way around. A size chart is a starting point; your tape measure is the final word.

The three bunk sizes you'll see in real campers

Bunk mattresses cluster into three practical groups: 28-inch narrow bunks, 30-inch standard bunks and full-size bunks. Each one has a different buyer.

The 28-inch bunk is the tightest common size. It shows up in corner bunks, cargo van conversions and small travel trailers where every inch counts.

A 28 x 72 mattress is the typical fit. The 30-inch bunk is the everyday size in many travel trailers and fifth wheels.

A 30 x 72 or 30 x 75 mattress covers most of these platforms and gives an adult a little more shoulder room without crowding the aisle.

The full-size bunk appears in toy haulers and larger fifth wheels. Those platforms run about 53 x 75 inches, close to a home full mattress.

Our RV full mattress guide covers the 53 x 75 and short full options. A few bunks take a twin, but they are the exception.

If your platform measures close to 38 inches wide, measure again before ordering a twin. An inch of overhang on each side is normal in a camper bunk, but 4 inches means you have the wrong size.

Narrow 28-inch bunks: corner and van conversions

The 28-inch bunk is the size to check when the platform hugs two walls. Corner bunks in smaller trailers and cargo van builds often land here, and a 30-inch mattress simply won't drop in.

This INEHM mattress is 28 inches wide and 72 inches long, so it suits the narrowest group in this guide. It's 6 inches thick with gel memory foam over a high-density base, and INEHM says the foam is CertiPUR-US certified.

The knitted cover zips off and is machine washable, which helps in a bunk that doubles as a kid's bed. INEHM offers a 12-month test period with a 10-year limited service term behind it.

Choose it when your platform measures 28 to 29 inches wide. A 30-inch mattress will not fit that bunk, no matter how much you want the extra width.

If your bunk is 30 inches and you want more comfort options, see our best memory foam RV bunk mattresses roundup.

Standard 30-inch bunks: travel trailers and fifth wheels

The 30-inch bunk is the most common size in travel trailers and fifth wheels. It gives an adult enough width to sleep on their back without hanging over the edge.

This hoggisleep mattress is 30 inches wide and 75 inches long, so it fits platforms that run a little longer than the 72-inch bunks. It's 6 inches thick: 2 inches of AquaSoft memory foam on top of a 4-inch high-density foam base.

hoggisleep builds it in Verona, Mississippi, and backs it with a 10-year limited warranty.

Pick it for a 30 x 75 platform that needs a longer mattress. The extra 3 inches over a 72-inch bunk matters for taller sleepers whose feet hang off the end.

The medium-firm feel suits most adults.

30 x 72 bunks: shorter platforms and tighter fit

Some 30-inch bunks stop at 72 inches long. Those platforms need a shorter mattress, and a 75-inch one will overhang or press into the wall.

The FoamRush is 30 inches wide and 72 inches long, so it fits the shorter end of the standard bunk group. It's 7 inches thick, with a ventilated gel memory foam layer over high-density support foam.

FoamRush says the gel layer helps the foam shed heat, and that the foam can be cut with a sharp knife if your bunk needs a custom trim. The cover is not included, and a 50% restocking fee may apply on returns.

Choose it when your platform measures 72 inches long and you want a thicker mattress. The 7-inch build gives more cushioning than a 6-inch bunk, as long as your overhead clearance allows it.

Check the gap to the bunk above before you commit.

How thick should an RV bunk mattress be?

Six inches is the safe default for most bunks. Thickness is a clearance problem first and a comfort question second, so measure upward before you buy.

The gap between the platform and whatever sits above it sets your ceiling. With an upper bunk it might be 30 inches or more, but under a cabinet or roof locker it can be much tighter.

A 6-inch mattress leaves room for bedding and for a kid to sit up in most bunks. A 7-inch mattress splits the difference, and an 8-inch one eats 2 more inches of headroom.

Clearance also affects the ladder. If it hooks over the edge of the upper bunk, a thick mattress can push the rungs too low or block the hook, so check the fit with the mattress in place.

Weight matters too. The FoamRush weighs about 18.6 lb, the hoggisleep about 28 lb and the INEHM about 16.1 lb, which is light enough for one person to lift when you need the storage under the platform.

Firmness is a separate choice. Medium-firm gives adults support without the thin, hard feel of the original camper pad, though side sleepers may want more cushioning on top.

Pick 6 inches unless your clearance allows more. The best mattress is no use if it presses against the bunk above or stops the ladder from hooking on.

Can you cut an RV bunk mattress to fit?

Yes, foam bunk mattresses can be trimmed, but measure first and cut once. Many bunk mattresses are foam slabs or foam layers, which makes a custom fit possible when your platform is between standard sizes.

The FoamRush mattress in this guide is sold as gel foam only, and FoamRush says it can be cut with a sharp knife, serrated knife or electric foam cutter. That flexibility helps if your bunk is 29 inches wide and no one sells that size.

Cutting has limits. You lose the cover if the mattress comes with one, and a trimmed edge is open foam unless you add a cover.

Trim carefully with a straight edge and a fresh blade, and take off small amounts rather than one big slice.

Don't cut a mattress that has springs or a built-in cover you want to keep. Those builds are not designed for trimming.

Foam is the material that tolerates it. If your bunk is a standard 28, 30 or full size, buy the matching mattress instead.

Cutting is the fallback for odd platforms, not the first move.

Measure your platform, then decide between a standard size and a trim. A custom cut is worth it only when no standard bunk size comes close.

What about full-size bunks and larger platforms?

A full-size bunk takes a mattress around 53 x 75 inches, which is close to a home full but often a little shorter. These bunks appear in toy haulers and larger fifth wheels where the bunk room doubles as a guest space.

The width is the main difference from a standard bunk. A 53-inch platform gives two adults or two kids room to sleep side by side, while a 30-inch bunk suits one person.

Measure the platform anyway, because some full bunks run 54 inches and others stop at 53. Length can be short.

Some full bunks use a 75-inch mattress, while others take a 74 or 80-inch version. A short full mattress fits platforms that would leave a gap with a standard full.

Thickness runs 6 to 8 inches in most full bunk builds, and the same clearance rule applies: measure up to the upper bunk or cabinet before choosing.

If your bunk is larger than a full, it may take a queen. Our guide to what is a queen RV mattress explains the 60 x 80 and short queen options.

Pick a full bunk mattress only when the platform measures close to 53 inches wide. A 30-inch bunk mattress will not cover that platform, and a home full may be too long for the space.

Why RV bunk sizes are not standardized

Each camper maker builds bunks to fit its own floor plan, so there is no single bunk size across the industry. That is the main reason buyers end up measuring instead of ordering by name.

Two trailers from different makers can have bunks an inch or two apart in width or length. The same maker can change bunk dimensions between model years.

A mattress that fit an older model may not fit a newer version of the same floor plan. The result is a market full of near-sizes: 28 x 72, 28 x 75, 30 x 72, 30 x 75 and 30 x 80 all exist.

Each one fits a real platform, and each one is the wrong size for some other camper.

This is also why home mattress sizes don't map cleanly onto bunks. A twin is 38 x 75 inches, a twin XL is 38 x 80, and a full is 53 x 75.

Bunk sizes borrow those words but not the exact numbers. When you shop, ignore the label and check the numbers.

A mattress sold as a "bunk" size might be 28, 30 or 34 inches wide. The dimensions matter more than the name.

Buy by measurement, not by name. The label on the box is a hint; the tape measure is the fact.

What else changes the fit besides width and length?

Clearance, platform type and bedding all affect whether a mattress works, even when the width and length match. These are the details that turn a correct size into a comfortable bunk.

Clearance we covered: the gap to the upper bunk or cabinet decides your maximum thickness. A mattress that is 1 inch too thick can stop the bunk from closing or make the ladder unusable.

Platform type matters for support. A solid platform holds a foam mattress evenly.

A platform with wide slats needs a mattress firm enough not to sag between them. Most camper bunks have a solid or nearly solid base, which suits foam well.

Corner fit is the quiet problem. Bunks in the corner of a trailer often have a cabinet or a wall return at the head or foot.

Measure the usable rectangle, not the full platform, so the mattress doesn't bind in the corner. Bedding adds a little height.

Sheets and a mattress pad can add an inch or so. If your clearance is tight, choose the thinner mattress.

Weight and access matter for maintenance too. A lighter foam mattress is easier to lift when you need to reach the storage under the bunk or clean the platform.

Check clearance and corner fit before you check the label. A mattress that matches the platform size but not the space around it will still cause trouble.

Which RV bunk mattress size should you order?

Order the mattress that matches your measured platform, and pick 6 inches thick unless your clearance allows more. That rule works for nearly every bunk.

For a 28 x 72 platform, the INEHM 6-inch gel foam bunk is the direct fit. It's the narrowest of the three here and comes with a washable zip cover.

For a 30 x 75 platform, the hoggisleep AquaSoft bunk is the match. Its 2-inch memory foam top over a 4-inch base gives a medium-firm feel for adults.

For a 30 x 72 platform, the FoamRush 7-inch gel foam bunk fits, and it can be trimmed if your bunk is slightly off-size. It's the thickest option here, so check overhead clearance first.

For a full bunk around 53 x 75 inches, our RV full mattress guide covers the options. For a queen platform, see what is a queen RV mattress.

If you want more memory foam choices in standard bunk sizes, the best memory foam RV bunk mattresses roundup has them.

The short version: measure width, length and clearance, round down, and buy the closest standard size. That keeps you out of the returns line.

Frequently asked questions

Is an RV bunk mattress the same as a twin?

No, an RV bunk mattress is usually narrower than a standard twin. A twin measures 38 x 75 inches, while many bunks run 28 to 30 inches wide.

A few larger bunks take a twin-size mattress, so measure first.

Can I use a home mattress in an RV bunk?

Usually not, because a standard twin is too wide for most bunk platforms. A short or narrow RV bunk mattress is built to the camper's actual platform size.

Measure your bunk before assuming a home mattress will drop in.

Why are RV bunk mattress sizes not standardized?

Each camper maker builds bunks to fit its own floor plan, so there is no single bunk size across brands. Two trailers from different makers can have bunks an inch or two apart.

Always measure the specific bunk you plan to fill.