Split king bed frames
Upgrade your sleep setup with a split king bed frame designed to support personalized comfort, flexibility, and better rest. Purple split king adjustable bases pair with two twin XL mattresses to deliver customized support, pressure relief, and more for each sleeper.
Split king adjustable bases
Enjoy individualized comfort without compromise. A split king adjustable base lets you and your partner choose your own angles.
Split King Purple Premium Plus Smart Base
Cutting-edge smart base tech revolutionizes rest + recovery
Smart app + wireless remote control
Adjustable leg height, compatible with most bed frames
Head + foot elevation, lumbar support, and pillow tilt
Customizable presets, massage settings + under-bed lighting
The right support
Your Purple mattress supports and conforms to your body like no other mattress. To function properly, it needs the right foundation.
Compatible with Purple mattresses:
- Bed frame with slats less than 3.5-inch apart
- Solid surface base
- Adjustable base tested to at least 750 lbs. weight capacity
Not compatible:
- Traditional box spring
- Bed frame with slats more than 3.5-in apart
Stronger together
Explore more Purple products designed to elevate comfort, recovery, and support throughout your day. Whether you're sleeping, lounging, or working, Purple products are built to help you stay comfortable in every space.
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Frequently asked questions
Getting the right fit matters just as much as getting the right comfort. Here is a quick breakdown of how a split king bed frame compares to a twin XL bed frame to help you choose the setup that best suits your space and routine.
Split king bed frame: A split king configuration consists of two individual twin XL mattresses placed side by side, totaling 76 inches wide by 80 inches long—the exact footprint of a standard king. Because it is designed for two separate mattresses, a split king bed frame (or an adjustable smart base) allows each sleeper to customize their side independently without disturbing their partner.
Twin XL bed frame: Measuring 38 inches wide by 80 inches long, a twin XL frame is half the width of a king. It is designed to support a single mattress, making it ideal for solo sleepers, taller individuals, or smaller rooms.
Split king mattresses are made of two individual twin XL size mattresses, which together are the same size as a king size mattress. Accordingly, couples with a split king mattress either use a king size bed frame — which typically range from 75” - 81” wide and 79” - 85” long — or two twin XL size bed frames — which range from 37” - 43” wide and 79” - 85” long.
In general, bed frames are 2” to 5" wider and longer than their corresponding mattress sizes. However, some lower profile styles, like platform bed frames, may be closer to the exact dimensions of the mattress.
We recommend adjustable bases for split king mattresses which offer custom comfort to couples. The Purple Adjustable Base, Premium Smart Base and Premium Plus Smart Base all come in split king sizing and are made specifically to support Purple mattresses, so you know they’ll be a perfect fit and protect your investment for years to come.
We recommend purchasing a bed frame for your Purple mattress right here at Purple. We offer a wide range of ergonomic bed frames, foundations, and adjustable bases engineered for sturdy, creak-free support. If you’d prefer to experience them in person — find our assortment of bed frames at the closest retailer near you.
If you're looking for the best split king bed frame, check out Purple's split king adjustable bases. These range from $1,198 for the Adjustable Base to $3,190 for the Premium Plus Smart Base — and all options offer a wealth of customizable comfort features that take R&R to the next level.
While a king size mattress and split king size mattress are different in that a split king is made of two individual twin XL size mattresses placed side by side, the total mattress dimensions are the same at 76” wide by 80” long. This means that king size mattress owners and split king mattress owners can both use a king size bed frame.
However, split king owners may prefer to add additional customization to their sleep by using a split king adjustable base — like the Purple Adjustable Base or Premium Plus Smart Base. By using a split king base, each sleeper can control elevation, lumbar support + more on their side of the bed.
California king size mattresses are longer and narrower than king and split king size mattresses, coming in at 72” wide by 84” long — so these mattresses are not compatible with standard king size bed frames. California king mattress owners will need to get a bed frame specifically designed for California king mattress dimensions.
If you’re looking for a king size or California king bed frame, check out the sturdy Purple Metal Platform, the stylish Upholstered Bed Frame, or the fully adjustable Premium Plus Smart Base.
No, mattresses and bed frames are sold separately, though we recommend checking out our sale page, as we often offer a discount when purchasing both.
If you’re looking for a split king size mattress, check out our bestselling split king size mattresses: The Purple Mattress® and the RestorePlus® Mattress — with responsive coils for enhanced pressure relief and temperature balance.
Our patented GelFlex Grid is the only mattress material that instantly relieves pressure for pain relief and proven deeper sleep. The Grid also sleeps cool, minimizes motion transfer, and adapts to every body type + sleep position.
All Purple mattresses include free shipping, easy returns, a 100 night mattress trial, and a 10 year warranty.
Only our Upholstered Bed Frame includes both a foundation and headboard. Headboard brackets (compatible with most headboards) can be purchased separately for the Premium Smart Base and Premium Plus Smart Base.
Purple bed frames ship free of charge — except for addresses in Hawaii and Alaska.