Average Bedroom Size: How Much Room Do You Really Need?

When you’re building a house or looking at layouts, it’s important to know how big you want each room to be. Even if you already have a house, you will want to know which room to use for your master bedroom, kids’ room, and so on. 

But what size is the average bedroom? The average bedroom size depends on many things. Such as the size of your house, the type of bedroom you’re referring to, and which country you live in.

Now, when we say “average,” in this article, we’re referring to the United States average since most of our readers are American. We’ll also talk about the average bedroom size in other countries. However, if the country isn’t specified, it will be the United States.

Average Bedroom Size

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The average bedroom size depends greatly on the type of bedroom you are referring to. A child’s room is not the same size as an adult’s room. For this reason, we can’t estimate, calculate, or research the average bedroom size in general. 

What we can do is give a range, although the range is quite large. You can find bedrooms anywhere from 50 sq ft in a tiny home to 500 sq ft in a large home. Since tiny homes are becoming more popular, the average bedroom size is becoming smaller. 

With a range so large though, it’s hard to figure exactly what the average bedroom size is. This is why we’ve broken it down a bit more into types of bedrooms, countries, and the size of the bed that is used in the room.

Average Home Size In The US

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Of course, the size of your bedroom depends upon the size of your home. You don’t want your bedroom to take up more room than your kitchen and living room combined. You want to find a good balance.

Luckily, there is a fairly easy formula for this. The average home size in the United States is about 2000 sq ft while the average bedroom size is 200 sq ft. That’s easy math! It’s simply 10% of the blueprint. 

This lets us know that the average bedroom size in the United States is about a tenth of the house size. If you want to use this formula when you’re picking out your home then go for it. It’s rather failproof in terms of balance. 

Although your bedroom is subject to your own taste and preferences. Not everyone wants an “average” sized room. Some people want a tiny bedroom and a large living room while others like it the other way around. 

Average House Size In Other Countries

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Although the United States has one of the biggest average bedroom sizes in the world, you’ll be surprised to know that it’s not the biggest. It is, however, the second biggest. The only country ahead of the U.S. is Australia.

Although we can’t gain access to accurate statistics on average house sizes in all countries, we can let you know the average house size in most popular countries. This is on average, counting both city (which are smaller) and rural (which are larger) houses. 

For example, the average house size in Hong Kong is less than 500 sq ft. Whereas other cities in China have apartments that are over 800 sq ft and that’s not uncommon. All around though, the average house size in the country is 645 sq ft (as seen below).

Average House Size:

Russia: 613 sq dt

China: 645 sq ft

United Kingdom: 818 sq ft

Italy: 871 sq ft

Sweden: 893 sq ft

Japan: 1022 sq ft

Spain: 1044 sq ft

Germany: 1173 sq ft

France: 1205 sq ft

Greece: 1356 sq ft

Denmark: 1474 sq ft

Canada: 1948 sq ft

United States: 2163 sq ft

Australia: 2303 sq ft

If you want to know the average bedroom size in any given country, you can always use the one-tenth rule, which would mean dividing the house size by ten. This will give you a good average, even though some people use a lot less or a lot more room for their bedroom. 

Culturally, bedrooms vary in size as well. A studio apartment may not have a separate bedroom while a farmhouse will have large bedrooms. Then you go to Japan, and you’ll notice minimalist furniture, which makes the rooms look even bigger. 

Size Of The Bed

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If your bedroom doesn’t have an owner yet but does have a bed picked out, that’s an excellent way to find out how big it needs to be. Another formula you can use is called The Golden Ratio, which is in short, three to one. 

This means, if you have a queen bed, which is about 33 sq ft, the ideal room size would be about 100 sq ft. This is great because a lot of bedrooms are 10 ft by 10 ft or 8 ft by 12 ft. Just remember, 3:1 and you’re all set. 

This is simply a rule of thumb though and a way to optimize space. However, most people prefer a larger room when they can afford it. So the larger the bedroom, the better, as long as it doesn’t take away from other rooms.

Average Master Bedroom Size

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The master bedroom is the biggest bedroom in the house. It belongs to the owner of the house, on most occasions. It also usually has a king-size bed, which means that space needs to be bigger than if you had a full-size bed. 

The average master bedroom size is between 200 and 300 sq ft. This is if the house is between 2000 and 3000 sq ft. The most common bedroom size for a master bedroom is 14ft by 16ft. This will generously accommodate a king-size bed with room for other furniture. 

If you don’t have an open concept house, and you want a bigger bedroom, you can always exchange your master bedroom with the living room or family room. The average living room is over 300 sq ft and 16 ft by 22 ft.

Kids Bedroom

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Kids’ bedrooms are often quite a bit smaller than other bedrooms. In fact, oftentimes, they are as little as one-half or even one-third of the size of the master bedroom. Most of the time, a kid’s bedroom will have a twin-size bed. 

Because of the smaller bed size, a child’s bedroom will be between 50 and 150 sq ft. Although sometimes it is larger if that is an option. Other times, home offices are turned into kids’ rooms, giving them less room. 

Even if children share a room, you can save space by using bunk beds. Kids over the age of five enjoy bunk beds and can use them safely. This way, you won’t have to add-on when children are sharing one room. 

Average Guest Room Size

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Most people don’t put too much thought into the size of their guest room. They use the room that is available. But in general, a guest room is bigger than a kids’ room but smaller than a master bedroom.

A guest room typically has either a full-size bed or a queen-size bed in it. The room itself is generally between 100 and 200 sq ft. But unlike other bedrooms, the size of a guest bedroom varies greatly. Some houses don’t even have a guest room.

If your house has more than one extra bedroom, set the larger bedroom up nicely. If you have one guest, put them there. If you have two, put some of the nicer things in the smaller bedroom so that both guests have equal amenities. 

How Small Is Too Small?

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If you don’t have a lot of room to work with, you’ll want to make each room as small as you can get by with. Get the smallest bed that you feel comfortable with and make sure that it takes up no more than half of the room.

So if you get a full-size bed, which is under 30 sq ft, wouldn’t bode well in a room that is under 60 sq ft. A room that is 8ft by 8ft would be quite small for a room with a bed this size but can work in a tiny house. 

There are also other options like sleeper sofas and futons that fold out into a bed. This way, during the day, there is more floor space and during the night, there is more bed space. You know what they say, “more bed room equals less bedroom.” 

Cost Of Adding A Bedroom

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The cost of adding a bedroom to your house depends on the square footage of that room. The range is anywhere from $50 per sq ft to $300 per sq ft. This ends up being somewhere between $10,000 and over $100,000. So yeah, that’s a big range. 

A master bedroom will cost you over $50,000 while a smaller room will be around $15,000. Each contractor charges differently so you’ll have to contact the company you have in mind in order to get a quote.

The state you live in matters as well. States like Arkansas and Mississippi have the cheapest construction costs while states like Hawaii and California have the most expensive. You can usually estimate your state’s cost by the cost of your home.


So there you have it. Now that you know the average, all you really need to know is the 3:1 rule and the 1/10 rule. All that’s left is your own preference. How much time are you going to spend in your bedroom? Do you work there or do you have a home office elsewhere? 

These are the kinds of questions you need to ask yourself. Your answers will help you decide how big of a bedroom you want and whether the ones you find are too big or too small. But remember, you can always renovate later!