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King Sized Adjustable Beds | Fast & Free Delivery

Explore King Adjustable Beds at Mattress Firm

Visit Mattress Firm today to explore our exquisite range of king adjustable beds. Our knowledgeable sleep experts are available to guide you through the selection process, ensuring you find the perfect bed that caters to your individual needs. Experience the freedom to customize your sleep, elevate your comfort, and wake up rejuvenated with a king adjustable bed from Mattress Firm.
A woman using her adjustable bed to prop up the the head so she can read in bed.

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Free & Fast Delivery
You want your perfect bed, and you want it quick—that’s why we offer Free & Fast Delivery*
120 Night Sleep Trial
120 Night Sleep Trial ®
Sleep on it for 120 nights—if you don't love it, we'll help you find a new one or your money back.^
Special Financing
Special Financing
Score better sleep within your budget—with our credit card & no-credit needed*, lease to own options.
Quality Mattresses at Every Price
Quality Mattresses at Every Price
We offer a wide selection of quality mattresses at every price.
Low Price Guarantee
Low Price Guarantee
See a lower price at another retailer? We'll match it up to 120 nights with our Low Price Guarantee.*
Sleep Experts In-Store & Online
Sleep Experts
Our Sleep Experts® receive 200+ hours of training annually (!) to help you get your best rest.

Frequently Asked Questions

Is an adjustable bed worth it?

Definitely. It can customize your sleeping positions and optimize your bed for entertainment and lounging. There is a variety of adjustable bed models to choose from, so you can rest assured that you'll find one that fits your sleep style and budget. We offer the best adjustable bed brands, like Leggett & Platt and Serta.

Does an adjustable bed help with pressure points?

Adjustable bases can help with pressure points by making it easy to relieve target problem areas such as your back, legs or joints. When you adjust your mattress to a reclined position, the “zero gravity” feel removes the stress placed on your pressure points, virtually eliminating them. Being in an elevated position also helps improve blood circulation to help you sleep comfortably.

How do adjustable beds work?

It's simple. Adjustable bases are motorized, ergonomic and remote-controlled. Technology does all the work. You just press a button, and it'll raise and lower your adjustable bed into any position you can dream of.

Do adjustable beds help with sleep apnea?

Yes, adjustable beds can help with sleep apnea. When you sleep in an elevated-head position, rather than flat, the airway experiences less blockage. By relieving pressure on your throat and lungs, sleeping on an adjustable base bed can help alleviate some of the symptoms of sleep apnea.

What are the best mattresses for adjustable beds?

Almost every mattress type we sell is perfectly compatible with your new adjustable bed. So if you have a memory foam, innerspring or hybrid mattress, you'll be all set. And the best part? It works on any size mattress. You can use a california king, king, queen, full, twin XL or twin size—we even offer a split queen adjustable bed, so you’ll be sure to find the right adjustable bed base for you!

Can you put any mattress on an adjustable bed?

Some coil-based mattresses are not compatible with adjustable bed frames. For example, mattresses that have VertiCoil or Bonnel coil systems are not made to bend and can't be used with an adjustable base. But don't worry. All mattresses that are compatible will be clearly marked in the product overview section, or your store associate will let you know. And don't worry about it fitting your furniture. Nearly every adjustable base we sell is designed to fit perfectly inside your headboard and footboard rail system.

Is an adjustable bed good for your back?

Science has proved that the use of an adjustable base can be good for your back. Reclining on an adjustable mattress is good for your back because it relieves pressure points, helping reduce the stress on your joints. It also can improve blood circulation, which makes sleeping easier on the entire circulatory system.

Are a motorized base, adjustable base, adjustable bed and electric base all the same thing?

Call it whatever you want, but we just call it taking your sleep to a whole new level. Motorized bases, adjustable bases, adjustable beds, adjustable bed frames, adjustable mattresses and electric bases are all the same thing.

What is a split adjustable base?

Just like split king mattresses, a split adjustable base is great for couples who have different comfort needs. A split adjustable bed allows both you and your partner to customize each side of the mattress to achieve personalized support independent of what the other prefers.
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