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Is a King Mattress Two Twins Put Together?

Is a King Mattress Two Twins?

When it comes to choosing a mattress size, a king-size bed is often considered the ultimate luxury. With more space to spread out and get comfortable, it’s easy to see why so many people opt for a king-size bed. However, some people wonder if a king mattress is simply two twin mattresses pushed together. In this article, we’ll explore whether a king mattress is two twins or something entirely different.

A king mattress is not the same as two twin mattresses. A king mattress typically measures 76 inches wide by 80 inches long, while a twin mattress measures 38 inches wide by 75 inches long. If you put two twin mattresses side by side, they would measure 76 inches wide by 75 inches long, which is slightly shorter in length than a standard king mattress.

However, two twin XL mattresses, which measure 38 inches wide by 80 inches long each, would equal the dimensions of a king mattress when placed side by side.

What is a King Mattress?

Before we delve into whether a king mattress is two twins, let’s first define what a king mattress actually is. A king-size bed is typically 76 inches wide and 80 inches long, making it one of the largest standard sizes available. This extra space is perfect for couples who want a little extra room to stretch out, as well as for those who simply enjoy the luxurious feeling of a large bed.

Twin Mattresses

Now that we know what a king mattress is, let’s take a look at twin mattresses. A twin mattress is the smallest standard mattress size, measuring 38 inches wide and 75 inches long. It’s typically used for children’s beds, bunk beds, and guest rooms.

Two Twins vs. a King Mattress

So, is a king mattress simply two twin mattresses pushed together? The short answer is no. While it may seem like two twin mattresses would be the same size as a king mattress, there are a few key differences.

Firstly, twin mattresses are slightly narrower than a king-size mattress. In order to equal the width of a king mattress, you would need to push two extra-long twin mattresses together. This would create a bed that is 76 inches wide and 80 inches long, the same size as a standard king mattress.

However, simply pushing two twin mattresses together wouldn’t create a true king-size bed. The gap between the two mattresses would create an uncomfortable ridge in the middle of the bed, making it difficult to get a good night’s sleep.

Additionally, most twin mattresses have a different level of firmness than a king mattress. This means that even if you could eliminate the gap between two twin mattresses, the two sides of the bed would still feel different.

What is a Split King Mattress?

While a king mattress is not simply two twin mattresses pushed together, there is a similar option available: the split king mattress. A split king mattress is essentially two twin XL mattresses placed side by side. Each side of the bed can be adjusted independently, making it a popular choice for couples with different sleep preferences.

Benefits of a King Mattress

Now that we’ve established that a king mattress is not simply two twin mattresses pushed together, let’s take a look at some of the benefits of choosing a king-size bed.

  • Extra space: A king-size bed provides ample space for couples to spread out and get comfortable, as well as for families who like to snuggle up together for movie nights.
  • Comfort: With more space to move around, a king-size bed can help reduce the likelihood of disturbing your partner’s sleep. It also allows for a wider range of sleeping positions.
  • Luxury: A king-size bed is often seen as a symbol of luxury and indulgence. It can make a bedroom feel more spacious and glamorous.

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In conclusion, a king mattress is not simply two twin mattresses pushed together. While it may seem like a logical solution, the gap between two twin mattresses would create an uncomfortable ridge in the middle of the bed. However, a split king mattress is a similar option that provides the same amount of space as a king-size bed, with the added benefit of adjustable firmness on each side.


  1. Can I use two twin mattresses instead of a king?
  • While it’s possible to use two twin mattresses to create a makeshift king-size bed, it’s not the same as a true king-size bed. The gap between the two mattresses can create discomfort, and the two sides may have different levels of firmness.
  1. What is the difference between a king and a California king?
  • A California king mattress is slightly longer and narrower than a standard king mattress. It measures 72 inches wide and 84 inches long, making it a good option for taller individuals who need the extra legroom.
  1. Are king-size beds more expensive than other sizes?
  • Yes, king-size beds are typically more expensive than other sizes due to their larger size and increased materials needed for construction.
  1. Can a king-size bed fit in a small bedroom?
  • While a king-size bed can be a luxurious addition to a bedroom, it may not be practical for small spaces. It’s important to measure your room and make sure you have enough space for the bed, as well as for other furniture and walkways.
  1. How do I choose the right mattress for me?
  • Choosing the right mattress depends on a variety of factors, including your sleeping position, preferred level of firmness, and any specific health concerns. It’s important to test out different mattresses in person and read reviews to find the best option for you.
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Dr Lawrence Woods DC

Dr Lawrence Woods DC


My goal is to create the highest quality ergonomic office chairs and accessories for unmatched comfort.

With 30 years of spinal healthcare experience in Ireland as a chiropractor, I learned the value of high-quality sitting for living a happy and healthy life.

I have a Chiropractic Degree from Life Chiropractic College West and I am NBCE Physiotherapy certified.


About Me

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