Camper Square Footage: What Are the Dimensions of 40 Ft RV?

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If you’re in the market for a new RV, you may wonder how much space you’ll get with different models. And, if you are looking specifically for a 40-foot RV, you might be thinking, how many square feet is a 40-foot RV? 

A 40-foot RV is approximately 320 square feet. This size RV is excellent for large families or groups who want to travel together. It offers plenty of space for everyone to sleep, relax and enjoy the ride. Plus, with all that extra space, you can bring along all the gear and toys you need for a great vacation. 

average width of a travel trailer

In this post, we’ll take a look at how many square foot is a 40-foot RV. We’ll also explore some of the best ways to use all that space! So, read on for some insights, whether you’re just starting your research or narrowing down your choices.

RV Square Footage Calculator

RVs come in all shapes and sizes, from smaller pop-ups and travel trailers to larger fifth wheels and motorhomes. And while some people are perfectly content with a cozy little space, others need all the room they can get. If you’re buying an RV, the very first thing you’ll need to find out is how much space your RV will take.

Luckily, there’s an easy way to find that out – and that’s by using an RV square footage calculator. Just enter the dimensions of the RV you’re interested in (length, width, and height), and it will tell you the approximate square footage it requires.

So, whether you’re looking for a spacious RV to accommodate your whole family or a smaller one that’s easy to tow, the RV square footage calculator can help you find the perfect RV based on the space you have.

RV Floor Plan

Choosing your RV floor plan is the second most difficult thing after you’re done choosing an RV. An RV floor plan is a layout of the inside of an RV. It shows where all the furniture, appliances, and storage areas are located. 

Floor plans can be very simple or very complex, depending on the size and style of the RV. Many people use floor plans to help them design their own RVs or to choose an RV that will suit their needs. 

Floor plans are also helpful when shopping for RVs, as they can help you visualize how the space inside an RV will be used. It determines how you’ll use your RV’s space and can make a big difference in your comfort and enjoyment while on the road. Therefore, it is really important to go with the right plan.

Factors To Keep In Mind Before Choosing Your RV Floor Plan

When choosing an RV floor plan, there are a few things to keep in mind. 

  • First, think about how you’ll be using your RV. Are you primarily a weekend camper, or will you take long trips? This will help you decide how much living space you need.
  • Next, consider your sleeping arrangements. Do you need a separate bedroom, or can you get by with a sleeper sofa in the living area? 
  • Finally, look at the floor plan’s overall layout. Is it open and spacious, or is it more closed off and intimate? This is purely a matter of personal preference, so choose what feels right for you.

Once you’ve considered all of these factors, you’ll be well on your way to finding the perfect RV floor plan for your needs.

Check Out How to Calculate Square Footage:

Average Size of an RV

The size and dimensions of RVs vary from model to model. Class A and Class C RVs are generally longer than Class B RVs. However, the width of the RVs of all three classes is almost the same.  

Here is a comparison of the dimensions of different RVs.

Class A29 to 40 feet8 feet, 4 inches
Class B17 to 23 feet8 feet
Class C21  to 41 feet8 feet, 6 inches

What Factors Determine The Size Of An RV?

There are several factors that go into determining the average length of an RV. These include the type of RV, the purpose for which it is used, and the number of people who will be using it.

Type Of RV

The type of RV is one of the most important factors in determining its size. For example, a travel trailer is typically much smaller than a fifth wheel or motorhome. This is because travel trailers are designed to be towed behind a vehicle, while fifth wheels and motorhomes are self-contained units.


The purpose of an RV is also a significant factor in its size. For example, RVs that are used for full-time living are often much larger than those that are only used for weekend getaways. This is because full-time RVers need more space for all of their belongings, as well as for entertaining guests.

Number of People To Accommodate

Finally, the number of people who will be using the RV is also a key factor in its size. RVs designed for large families or groups of friends are typically much larger than those meant for couples or small families.

Related Questions

What Type of RV Is Best for Full-Time Living?

Class C RVs are the best option for full-time living. They’re spacious and comfortable and have all the amenities you need to feel at home on the road. Class A RVs are also a good choice for full-timers and tend to be even more luxurious than Class Cs. However, they can be more expensive and harder to drive. 

What Is the Average Lifespan of an RV?

RVs are generally built to last for many years if they are properly maintained. The average lifespan of an RV can be anywhere from 10-20 years or more.

One of the most important things you can do to extend the lifespan of your RV is to keep up with regular maintenance. This includes things like servicing the engine, regularly checking fluid levels, and making sure all systems are in good working order. Additionally, it’s important to store your RV properly when it’s not in use. This means protecting it from the elements and keeping it clean and free of debris.

With proper care and maintenance, your RV can provide you with years of enjoyment. 

Can You Live Permanently in an RV?

Yes, you can live permanently in an RV! Many people choose this lifestyle for its flexibility and freedom – you can pick up and go whenever and wherever you please. Of course, there are some things to consider before switching to full-time RV living

For example, you’ll need to consider where you’ll store your RV, how you’ll finance it, and what kind of insurance you’ll need. But if you’re prepared to make the jump, there’s no reason why living in an RV can’t be a permanent arrangement!

How Many Square Feet Is a 20×20 Room?

A 20×20 room is 400 square feet. This is a standard size for many types of rooms, including bedrooms, living rooms, and dining rooms. Many homes have at least one room that is this size, and some even have multiple rooms that fit this description.

The Bottom Line

So, how many square feet is a 40-foot RV? The answer is around 320. That’s enough space to sleep up to six people and still have plenty of room to move around. If you’re looking for a little more elbow room, consider upgrading to a 43 or 45-foot model.

These larger RVs can accommodate up to eight people while still leaving plenty of living space. How does that compare to your current home? Do the math and see if downsizing into an RV could save you money each month on rent or mortgage payments. 

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Written by William Perry
William was born and raised in the United States and currently lives in Utah. A retired police officer, he is the father of three and grandfather of six. Along with writing, he enjoys traveling, the outdoors, reading and spending time with his grandchildren.
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