What Is a Split King Bed?

A split king bed can offer much comfort to couples. Especially if one moves around a lot while sleeping. Split king mattresses are widely available and it is easy to find suitable bedding. Let’s find out if a split king size bed is for you.   

A king size mattress is 76 inches wide by 80 inches long  

What Is a King-Size Mattress? 

King mattress sizes are 76 inches wide by 80 inches long, providing 42ft² of sleep space. The dimensions of a king-size mattress provide plenty of space especially when comparing a king vs. queen bed, in particular couples or those who have small children or pets. They are also affordable at around $899 from a reputable online retailer.  

What Is a Split King-Size Mattress?  

Split king mattresses are two twin xl beds. Combined with a split king adjustable base, a split king bed could be perfect for couples where one is an active sleeper (moves around a lot during the night). Split king mattresses with an adjustable base allow you to sit up in bed reading while your partner lays flat sleeping. You control your own sleep space but enjoy having your partner sleep beside you, within arms reach for a snuggle.    

Guide to Mattress Sizes

Please refer to the chart below to help guide you to what size bed should I get.


Dimensions (Inches)


10” Original 

Dimensions (Inches)


12” Signature

Total Sleep Area

Space for Person






Twin XL




















California King





Twin Mattress

A twin bed is 38 inches wide and 75 inches long. It’s a perfect size mattress for children. You’ll find this size in bunk beds and is a good size for a small room. 

Twin XL Mattress

A twin xl mattress is 38 inches wide and 80 inches long. A twin xl mattress is great for older children and young adults. This is the typical size mattress that you will find in college dorm rooms. If you’re a single sleeper and have limited bedroom space, a twin xl mattress could suit your needs. 

Full Mattress

Adults with a small frame will find the dimensions of a full mattress comfortable at 54 inches wide and 75 inches long. Growing teens will get many years of comfy sleep from a full mattress.  

Queen Mattress

Queen is the most popular mattress sizes in America. It is 60 inches wide and 80 inches long and great for couples who sleep close. If you’re a couple who enjoys a lot of personal space, opt for a king mattress.   

King Mattress

A king size bed is ideal for couples who enjoy plenty of individual sleep space. At 76 inches wide and 80 inches long, a single sleeper or couple who have children or pets will enjoy the space of a king size bed.   

California King Mattress

A California king is seen as a celebrity bed. At 72 inches wide and 84 inches long, tall people will enjoy the extra length. Assessing a king vs. California king is important to note if your bedroom is narrow, a California king could comfortably fit as it is less wide than a king by 4 inches.    

Split King Mattress

For plenty of sleep space and to sleep side by side with your partner and experience zero motion transfer, split king mattresses are a viable option. A split king adjustable base with massage and wall glide is comfortable and affordable at under $1,500. Split kings provide two separate sleep spaces but you will sleep side by side with your partner.      

A split king mattress is great for couples

What Are the Benefits of a Split King Bed? 

  • Great for couples 
  • Great for those with small children or pets
  • Experience zero motion transfer 
  • Easy to find fitted sheets and bedding
  • Easier to move around the room or when moving house
  • Perfect for adjustable base  

Who Is a Split King Bed Best Suited For? 

A split king mattress is great for couples. Especially if you move around a lot in bed as your sleeping surface is all yours. But, you get to enjoy sleeping side by side on a separate mattress from your partner. A split California king mattress is 72 inches wide by 84 inches long and a good choice if you have the space for it.  

What Kind of Base Should I Buy for a Split King?  

An adjustable base is ideal for a split king but not the only option. A split king base is widely available and affordable.  

Split King Bed: Pros & Cons

Split King Pros

Split King Cons 

Zero motion transfer 

Little gap between mattresses 

Can have 2 different firmness levels 

Will need to buy more sheets so will spend more money 

Can have 2 different levels with an adjustable base

Slightly more expensive than just one mattress

Best Split King Bedding 

Split king bedding is easy to find and affordable. You could put one large duvet or comforter on the bed but you will need two separate sheets. You will need two separate mattress protectors too. Bamboo sheets are another luxurious bedding option. 

Conclusion: Is a Split King Bed Best for me? 

Split king mattresses are available in many styles; AirFoam™, memory foam mattresses, spring and foam mattresses. Knowing your sleep style is beneficial when choosing your new mattress. If you are a side sleeper choose a mattress that provides premium pressure relief and opt for a mattress size that provides ample sleep space.