King-size mattresses are a popular pick for couples, especially those with larger master bedrooms. They offer plenty of personal space, which is a big plus for a good night’s sleep.
But what if you and your partner have totally different ideas about what makes a comfortable bed? Maybe one of you likes a firm mattress while the other prefers something soft and plush. Or perhaps one of you tosses and turns all night, disturbing the other’s sleep.
That’s where the split king mattress comes in. It’s designed to give couples the best of both worlds: the spaciousness of a king-size bed with the personalized comfort of two separate mattresses. In this article, we’ll take a closer look at what is a split king mattress, including its pros and cons, and how to choose the right one for you.
What is a Split King Mattress?
A split king mattress is essentially two Twin XL mattresses sitting next to each other. Each of those Twin XL mattresses measures 38 inches wide and 80 inches long.
So, what’s the point? Well, when you put them together, you get the same dimensions as a standard king-size bed: 76 inches wide by 80 inches long.
That’s right: a split king and a standard king take up the same amount of space. But a split king is not the same thing as shoving two twin beds together. A standard twin bed isn’t long enough; that’s why split kings use the “extra long” version.
The key difference is that a split king allows for independent adjustability on each side of the bed, which is great if you and your partner have different sleep preferences.
Benefits of a Split King Mattress
So, why would someone choose a split king over a regular king? It boils down to personalized comfort and minimizing sleep disturbances. Here’s a breakdown of the key advantages:
Individualized Sleeping Preferences
This is where the split king really shines. Imagine you prefer a firm mattress while your partner loves something plush and cloud-like. With a split king, you can each have exactly what you want. Because it’s two separate mattresses, you can choose different firmness levels, different mattress types (like memory foam vs. innerspring), and even adjust your sleeping positions independently – especially when paired with an adjustable base (more on that later!). It’s all about getting the support that’s perfect for you, without compromise.
For couples with vastly different sleep styles or needs, this is a game-changer. Maybe one person needs extra lumbar support due to back pain, while the other prefers a softer surface for pressure relief. A split king allows for that level of customization, promoting better sleep quality for both individuals.
Motion Isolation
One of the biggest complaints couples have about sharing a bed is motion transfer. If one person tosses and turns, the other person feels it. A split king mattress significantly minimizes motion transfer because the two mattresses are separate. This means you can sleep soundly even if your partner is a restless sleeper. Think of it as peaceful motion isolation, allowing you to drift off without feeling every shift and turn.
This is a huge benefit for light sleepers who are easily awakened by movement. No more being jolted awake by a partner getting up to use the restroom or simply shifting positions during the night. You can finally get the undisturbed rest you deserve.
Adjustable Bed Compatibility
Split king mattresses are designed to work seamlessly with adjustable bed frames. This opens up a whole new world of comfort and customization. Because the mattresses are separate, you can independently elevate your head and feet, creating personalized sleeping positions that alleviate pressure points and promote better circulation.
This independent adjustability can be particularly helpful for reducing snoring and back pain. Elevating the head can help open up airways and reduce snoring, while adjusting the leg position can alleviate pressure on the lower back. It’s like having a personalized sleep sanctuary tailored to your individual needs.
Increased Lifespan
While it might not be the first thing that comes to mind, split king mattresses can actually have a lifespan advantage over traditional king mattresses. Because they’re separate, you can flip and rotate each mattress independently. This helps distribute wear and tear more evenly, potentially extending the overall lifespan of your sleep setup. This durability can save you money in the long run by postponing the need for a replacement.
Drawbacks of a Split King Mattress
While there are plenty of good reasons to choose a split king mattress, it’s important to consider the downsides, too.
Potential Gap in the Middle
Because a split king mattress is literally two twin XL mattresses pushed together, there’s a chance you’ll end up with a gap or seam right down the middle of the bed.
Luckily, this is easily fixed. Mattress connectors, bridge-the-gap mattress toppers, and nonslip pads can hold your split king together. You can also buy a mattress retainer bar to keep the two mattresses snug against each other.
Bedding Challenges
You’ll need to use twin XL sheets on a split king, which can be a little more difficult to find and sometimes a little more expensive than standard king- or queen-sized sheets. You’ll also need to purchase individual blankets or comforters for each side of the bed, or buy one that’s extra large to accommodate both sleepers.
Limited Sharing Space
If you and your partner like to snuggle in the center of the bed, the gap can be a real problem. It limits your shared space and can make cuddling uncomfortable.
Cost Considerations
Split king mattresses tend to be more expensive than standard king or queen mattresses, so they may not be the best choice if you’re on a budget. The adjustable bases also add to the overall cost.
Choosing the Right Split King Mattress
So, you’re thinking about a split king? Awesome! Now comes the fun part: picking the right one. Here’s what to keep in mind:
Size and Compatibility
First things first: measure your bedroom! Nothing’s worse than getting a new mattress only to realize it makes your room feel cramped. Think about the size of your bedroom and how much space you actually have before you even start browsing.
Also, consider what kind of bed frame you have, or plan to get. A split king needs the right support, which usually means two Twin XL adjustable bases. Make sure whatever mattress you choose is compatible with those bases, especially if you’re going for an adjustable setup.
Material and Construction
Mattresses come in all sorts of materials these days: memory foam, latex, innerspring, and hybrids (a mix of everything!). Each material has its own feel and benefits, so do a little research to figure out what you prefer. Memory foam is known for conforming to your body, while latex is bouncier and often more eco-friendly. Hybrids try to give you the best of both worlds.
Firmness and Support
Firmness is a big deal. Do you like a super soft mattress that you sink into, or something firmer that keeps you “on top” of the bed? Your sleep position matters, too. Side sleepers often prefer softer mattresses, while back and stomach sleepers usually need something firmer for proper support.
Whatever firmness you choose, make sure the mattress offers good support and pressure relief. You don’t want to wake up with aches and pains!
Cooling Features
If you live in a warm climate, or you just tend to sleep hot, cooling features are essential. Look for mattresses with breathable materials or special cooling gels that help dissipate heat. Nobody wants to wake up in a sweat!
Split King vs. King: What’s the Difference?
So, what is the difference between a split king and a regular king mattress? The main thing to remember is that a split king is basically two Twin XL mattresses pushed together. A standard king is one big mattress, measuring 76 inches wide by 80 inches long. Regular kings work well in larger master bedrooms because they give couples plenty of space.
Split kings let couples customize their sleeping experience. Each person can choose a different firmness, mattress type (like memory foam or innerspring), and even adjust their sleeping position with an adjustable base.
Another big plus is motion isolation. If you sleep with someone who tosses and turns all night, a split king can really help. Because the mattresses are separate, you’re less likely to feel their movements and more likely to get a good night’s sleep.
Common Questions About Split King Mattresses
Can you feel the gap in a split king?
Split king mattresses have a seam down the middle where the two mattresses meet, and some people find that this can be a little uncomfortable. However, there are a few ways to deal with this. You can buy a connector to hold the two mattresses together, or you can use a mattress topper or nonslip pad to create a more seamless surface.
Is a split king bigger than a California king?
Yes, but only slightly. A standard king mattress (which is what you get when you put two twin XLs together) is around 6,080 square inches, while a California king is around 6,048 square inches.
How do you keep a split king from sliding apart?
You can buy a mattress retainer bar or use a nonslip pad under the mattresses.
Closing Thoughts
If you and your sleep partner have very different ideas about mattress firmness, a split king mattress could be the ideal compromise. Each of you gets the support you want, and you won’t feel each other tossing and turning.
Keep in mind that you might notice a gap between the two mattresses, and you’ll need to buy special sheets. Split king mattresses also tend to be more expensive than standard mattresses.
Ultimately, the best mattress is the one that helps you get a good night’s sleep. If you value customization and motion isolation, a split king might be the perfect fit.