What is a split king mattress?

What is a split king mattress?


A split king mattress is a unique type of mattress that offers a customizable sleeping experience for couples. It consists of two separate twin XL mattresses placed side by side on a single bed frame. This design allows each individual to have their own sleeping surface while sharing the same bed frame. In this article, we will explore the features, benefits, and considerations of a split king mattress.

Features of a Split King Mattress

A split king mattress typically measures 76 inches wide and 80 inches long, which is the same size as a standard king-size mattress. However, it is divided into two separate mattresses, each measuring 38 inches wide and 80 inches long. This division allows for independent movement and customization on each side of the bed.

One of the key features of a split king mattress is the ability to adjust the firmness level on each side. This is particularly beneficial for couples who have different preferences when it comes to mattress firmness. Each individual can choose a mattress with the firmness level that suits their needs, ensuring a comfortable and restful sleep for both.

Benefits of a Split King Mattress

1. Customized Comfort: With a split king mattress, couples can enjoy personalized comfort by selecting mattresses with different firmness levels. This is especially beneficial for partners who have different body types, sleeping positions, or specific comfort requirements.

2. Reduced Motion Transfer: Split king mattresses are designed to minimize motion transfer between the two sides of the bed. This means that if one person moves or gets out of bed, the other person is less likely to be disturbed. This can lead to a more uninterrupted and peaceful sleep.

3. Individual Adjustability: Split king mattresses often come with adjustable bases, allowing each person to customize their sleeping position. Whether it’s elevating the head or feet, or finding the perfect angle for reading or watching TV in bed, an adjustable base provides individual control and comfort.

4. Compatibility with Adjustable Bases: Split king mattresses are compatible with adjustable bed frames, which further enhances the comfort and functionality of the sleep setup. Adjustable bases allow for easy adjustments to find the optimal position for relaxation, sleep, or other activities.

Considerations for a Split King Mattress

While a split king mattress offers many benefits, there are a few considerations to keep in mind before making a purchase:

1. Bed Frame Size: Split king mattresses require a bed frame that can accommodate two twin XL mattresses. It is essential to ensure that the bed frame is wide enough to support the two mattresses without any gaps or instability.

2. Sheets and Bedding: Due to the unique size of a split king mattress, standard king-size sheets may not fit properly. Specialized split king sheets are available to ensure a snug fit on each mattress. Additionally, couples may need to consider purchasing separate bedding for each side.

3. Cost: Split king mattresses can be more expensive than traditional mattresses due to their specialized design and features. It is important to consider the budget and weigh the benefits against the cost before making a decision.


A split king mattress provides a customizable sleeping experience for couples, allowing each individual to have their own sleeping surface while sharing the same bed frame. With features like adjustable firmness levels and reduced motion transfer, it offers personalized comfort and uninterrupted sleep. However, considerations such as bed frame size, specialized bedding, and cost should be taken into account before purchasing a split king mattress.


1. sleepfoundation.org
2. mattressclarity.com
3. sleepadvisor.org