When you’re trying to figure out mattress sizes for your RV, I know how easy it is to feel unsure about where to start. You look at the space, you check the labels, and suddenly, nothing matches the sizes you’re used to at home.
RV rooms have tight corners, different platforms, and measurements that can shift from one model to the next.
That’s why understanding RV king-size bed dimensions helps you make a clear choice without second-guessing yourself. It gives you a better idea of what will fit your space and what won’t.
In this guide, I’ll walk you through the common sizes, show you simple measuring steps, and help you choose a mattress that actually fits your RV and your needs.
What is an RV King Size Bed and What are its Dimensions?
An RV king-size bed is a king mattress made to fit inside a camper or motorhome. It gives you king-level sleeping space, but in a slightly smaller or shorter size, so it can fit tight RV bedrooms.
Most RV king mattresses measure about 70–72 inches wide and 74–80 inches long. The exact size depends on the brand and the floor plan in your rig.
There is no single official RV king size. Every maker sets their own measurements, so you should always check the product specs before you buy.
Comparing RV King, Regular King, and California King
RV king sizes differ from home king beds because RV rooms have tighter pathways, smaller doorways, and slide-out limits that require slightly shorter or narrower dimensions.
| Mattress Type | Width (inches) | Length (inches) | Best For | Notes |
|---|---|---|---|---|
| RV King | 70–72 | 74–80 | Couples who want more room in larger RVs | Slightly smaller than a home king to fit tight pathways and slide-outs |
| Regular King (Home King) | 76 | 80 | Maximum sleeping width for two adults | Often too large for RV doors, hallways, and platforms |
| California King | 72 | 84 | Tall sleepers needing extra leg room | Longer than an RV king; rarely fits RV layouts |
| RV Short King | 70–72 | ~75 | Compact RV bedrooms or shallow slide-outs | Helps preserve walkway space and cabinet clearance |
These measurements highlight how each size fits different RV layouts, helping you decide which option gives you enough sleeping space without crowding your room.
Quick pros and cons:
- Tall sleepers: A full-length RV king usually feels better.
- Shorter sleepers or tight rooms: A short king gives you more walkway space.
RV Mattress Size Chart
RV mattresses come in many shapes and sizes, so it helps to see all the common options in one simple chart.
| Mattress Size | Width (in) | Length (in) | Best Use |
|---|---|---|---|
| RV Bunk | 28×75, 30×75, 30×80, 34×75, 35×79 | Varies | Kids and bunkhouse layouts |
| RV Twin | ~38 | ~75 | Solo sleepers in compact RVs |
| 3/4 Mattress | ~48 | ~75 | Older RVs or small guest spaces |
| RV Full | ~53 | ~75 | Teens or solo adults needing more room |
| RV Short Queen | ~60 | ~75 | Travel trailers and Class C bedrooms |
| RV Queen | ~60 | ~80 | Couples in mid or large RVs |
| RV King | 70–72 | 74–80 | Fifth wheels and luxury Class A RVs |
| RV Short King | 70–72 | ~75 | Tight king layouts with limited walkway space |
Note: Sizes can shift by 1–2 inches depending on the brand and how the platform is built.
This chart gives you a clear view of how each RV mattress size compares, making it easier to match your platform to the right fit.
Types of RV King Mattresses
RV mattresses come in many of the same materials as home mattresses, but they’re usually lighter and designed to fit tighter bedroom layouts.
1. Memory Foam RV King Mattresses
Memory foam molds to your body and reduces movement, which helps you sleep better in a small space.
It’s easy to carry through narrow RV doors and works well on most platforms. The main downside is heat retention, so good airflow under the bed helps keep it comfortable.
2. Hybrid RV King Mattresses
Hybrid mattresses combine coils with foam layers to give you strong edge support and a balanced feel.
They offer a slight bounce and make it easier to shift positions during the night. This design works well for couples who want support without feeling each other move.
3. Innerspring RV Mattresses
An innerspring mattress uses metal coils to create a firm, traditional feel. It allows plenty of airflow and can stay cooler than memory foam, which helps in warm climates.
The tradeoff is more motion transfer and extra weight, which may matter in some RV setups.
4. Latex and High-Density Foam Options
Latex and high-density foam mattresses offer strong support and tend to last longer than many other RV mattress types.
They feel stable, resist sagging, and work well for heavier sleepers. These materials often cost more and can weigh more, which may affect certain RV layouts.
5. Custom-Cut and Specialty Mattresses
Some RV bedrooms need mattresses shaped to fit tight corners or unusual platforms. Custom-cut options can include rounded edges, trimmed corners, split designs, and foldable or hinged builds.
These specialty styles make it possible to fit a comfortable mattress into spaces where standard sizes won’t work.
How Thick Should an RV King Mattress Be?
Most RV king mattresses range from 6 to 12 inches in thickness. Thicker options can feel softer and more supportive, but they also add more weight and raise your sleeping height.
In some RVs, a tall mattress can bring you closer to overhead cabinets or windows, which may make the space feel tight.
Thinner mattresses work better in loft beds, slide-outs, and areas with limited headroom. If the bed sits under cabinets or inside a shallow slide-out, a full 12-inch mattress may not leave enough space to move comfortably.
Choosing the right thickness comes down to comfort, weight limits, and how much vertical space your layout allows.
Choosing the Right RV Mattress Size for Your Rig
Your RV class and floor plan influence which mattress size works best.
- Travel trailers and fifth wheels often fit RV queens, short queens, and sometimes RV kings.
- Class A motorhomes have the most space and can handle full-length RV kings or even a standard king.
- Class B and Class C motorhomes are tighter, so they often use short queens, short kings, or custom corner-cut beds.
- Toy haulers use folding or drop-down beds that may hold an RV king if the platform allows.
When choosing between an RV king, short king, or queen, think about your height, pets, kids, walkway room, and your mattress budget.
Comfort Upgrades for Your RV King Bed
Comfort upgrades can improve how your RV king bed feels, especially if the mattress is firm or slightly smaller than the platform.
A good topper or pad can adjust the feel of the bed and help correct small fit issues.
- Add softness or firmness
- Smooth out minor dips
- Fill small gaps between the mattress and platform
RV king and short king mattresses often need RV-specific bedding. Some standard king sheets may fit, but many are loose. Sheet straps can help keep everything tight.
Moisture control is also important since RV beds sit in tight spaces. Using a slatted platform, placing an airflow mat under the mattress, and lifting the bed occasionally can help prevent condensation and mold.
Buying Checklist for RV King Size Beds
Before you order an RV king mattress, take a moment to double-check the important details.
This helps you avoid sizing surprises and makes sure the mattress you choose fits both your platform and your layout.
Quick Pre-Purchase Checklist:
- Measured platform width, length, and height
- Checked doorway and hallway clearance
- Confirmed the exact mattress size you need
- Choose the mattress type that fits your comfort needs
- Reviewed the return policy and warranty
When you’re ready to buy, you can look at online RV mattress brands, large RV retailers, or local mattress shops that offer custom sizes.
These options give you flexibility if you need a standard RV king or a unique shape for your platform.
Final Thoughts
I hope this guide makes it easier for you to sort through the different RV king-size bed dimensions and choose the one that fits your space.
You learned how RV sizes work, how to measure your platform, and how each mattress type can change the feel of your room.
My goal is to help you avoid confusion and feel more confident as you pick the right size for your setup.
If you keep your layout, comfort needs, and daily routine in mind, you’ll find a mattress that supports you well and fits your RV without stress. If you want more simple tips and ideas, check out my other posts.
