Adjustable Bed Sizes and Dimensions Chart

Adjustable bed frames, once found mostly in hospitals, are now a popular choice at home for anyone who wants to raise their head or feet to read, watch TV or rest. The good news when you shop: adjustable bed sizes follow standard mattress sizes, from twin to California king, plus split sizes that let each side of the bed move on its own. This guide gives you every size in inches and centimeters, the room each one needs, how split bases work with your mattress, and what else to check before you buy.

What Adjustable Bed Sizes Can Be Found on the Market Today?

Adjustable bed sizes are the same as standard mattress sizes. Unlike a regular bed frame, an adjustable base doesn't add a border around the mattress: it's built to the mattress size so the mattress sits right on the moving deck. For example, Turmerry's queen base is 60 x 80 inches, exactly the size of a queen mattress.

Twin XL, queen and split king are the sizes you'll find most often. Twin, full, California king and split queen bases exist too, but fewer models come in those sizes, so check before you choose a mattress size around a base. Whichever size you pick, the mattress on top should match it. Our mattress size chart lists every size in inches, feet and centimeters.

1. Twin-Size Adjustable Bed

A twin adjustable bed, also called a single adjustable bed, is 38 inches wide and 75 inches long (about 97 x 191 cm). It's the narrowest size, a good fit for small bedrooms, studio apartments and guest rooms, and it suits one sleeper: usually kids, teens or adults under 6 feet tall. Plan on a room of at least 7 x 10 feet. See our twin size bed guide for more.

2. Twin XL Adjustable Bed

A twin XL adjustable bed is 38 inches wide and 80 inches long (about 97 x 203 cm), the same width as a twin but 5 inches longer. That extra length gives anyone over 6 feet tall more legroom, which is why the twin XL is also the standard dorm size. It's the most common adjustable base size, because two twin XL bases side by side make a split king.

3. Full-Size Adjustable Bed

A full adjustable bed is 54 inches wide and 75 inches long (about 137 x 191 cm), 16 inches wider than a twin. For single sleepers who find a twin too narrow, a full gives you the same features with a lot more room, which combination sleepers who change positions during the night often appreciate. It needs a room of about 9 x 10 feet. Our full size bed guide covers it in detail.

4. Queen Adjustable Bed

A queen adjustable bed is 60 inches wide and 80 inches long (about 152 x 203 cm). It gives two people room to sleep comfortably without needing a king-size bedroom, and its 80-inch length suits tall sleepers too. A queen fits a 10 x 10 foot room; 10 x 12 feet feels more open. On a single queen base, both sleepers move together. See our queen size bed guide for room layouts.

5. King Adjustable Bed

A king adjustable bed is 76 inches wide and 80 inches long (about 193 x 203 cm), the widest standard size. It suits couples who want space and families who share the bed. Plan on a room of at least 12 x 12 feet. Many king adjustable bases, including Turmerry's, are actually two twin XL bases: you can run each side on its own or sync them so the whole bed moves as one. Our king size bed guide has more on king sizes.

6. Split Adjustable Bed (Queen, King, & Cal King)

Split queen, split king and split California king adjustable beds have the same overall size as a regular queen, king or Cal king, but they're split down the middle into two bases:

The big advantage of a split base is that each of you gets your own controls. One partner can raise their head to read while the other stays flat, and because the two sides are separate bases, raising one side doesn't lift the other.

You're not stuck with two separate beds forever, either. Most split bases can be synced, so both sides move together from a single remote. That's handy when you both like the same position. Keep in mind that the mattress setup matters with a split base, as the section on split bases and your mattress below explains.

7. California King Adjustable Bed

A California king adjustable bed is 72 inches wide and 84 inches long (about 183 x 213 cm): 4 inches narrower and 4 inches longer than a standard king. It's still wide enough for a couple, and its extra length helps if you're over about 6 feet 2 inches tall and want room beyond your feet. California king bases are less common than king bases, so check availability early. Compare the two in our king vs California king guide.

Turmerry Adjustable Base Sizes and Specs

Turmerry's four adjustable bases come in three sizes: Twin XL (38 x 80 inches), Queen (60 x 80 inches) and King, which ships as two Twin XL bases (76 x 80 inches together). A sync cord comes with the king, so you can run the two sides separately or link them to one remote. Here's how the models compare, based on their product pages:

All four bases fold for easier setup and moving, use quiet motors, lower back to flat using gravity, and have a button under the base to bring it flat during a power outage. Turmerry doesn't make twin, full, California king or split California king adjustable bases, so if you need one of those sizes, look for a base made in that exact size.

Split Adjustable Bases and Your Mattress

A split base only lets each side move on its own if the mattress can bend in two places too. That's the part people often miss when they order a split king base. You have two main options:

Turmerry's split king, split queen and split California king mattresses are built a little differently from both. Each one is a single zippered organic cotton cover the full size of the bed, with two side-by-side sets of latex layers inside, so each of you can choose your own firmness on one mattress. Because both sides share one cover (and on the DIY Hybrid, one coil unit), they aren't two separate mattresses. For a traditional split king with two completely separate mattresses, our DIY Hybrid Mattress page recommends two Twin XL mattresses instead.

Adjustable Beds: A Modern Marvel

Imagine lying on your mattress, pressing a button, and letting the bed smoothly raise your head, your knees and feet, or both. That's what adjustable bases do: they let you change the shape of your bed instead of stacking pillows.

Most bases offer some or all of these positions:

Adjustable bases are popular with people who spend time awake in bed. If you read, work or watch TV there, a raised head section supports your whole back while you sit up. Parents often like being able to sit up comfortably to feed a baby, and many older adults find it convenient to change position without moving a pile of pillows around.

Why Does Adjustable Bed Frame Size Matter?

The size of an adjustable bed frame matters for three main reasons: mattress compatibility, bedroom fit and personal comfort.

Should You Consider Getting an Adjustable Bed Frame?

If you're replacing your bed frame anyway, an adjustable base is worth a look. Most models with foot lift also offer a zero-gravity preset that raises your upper and lower body together. Whether it's worth the extra cost depends on how you use your bed.

The Pros and Cons of an Adjustable Bed Frame

Adjustable bases are useful in many ways, but they have drawbacks too. Weigh both before you buy.

Pros

Personalized comfort. You can raise your head, your legs or both, and try different angles until one feels right. That flexibility is useful in bed and beyond sleep: for reading, working, studying, meditating, nursing a baby or enjoying breakfast in bed.

More positions without pillows. Because the whole section of the bed lifts, your back is supported along the slope instead of propped on a pile of pillows that slip during the night. What feels best varies a lot from person to person, so give each position a few nights. If you have a health condition, ask your doctor which positions suit you.

Couple-friendly design. With a split king, split queen or split Cal king base, each person sets their own side. One of you can sit up to read while the other sleeps flat, and raising one side doesn't move the other.

Modern look and features. Most adjustable bases have a slim, contemporary design. Depending on the model, you may get a wireless remote, programmable presets, under-bed lighting, massage and USB charging ports.

Cons

Higher cost. Adjustable bases generally cost more than a standard bed frame of the same size, and the price climbs with size and features. Head-only bases are the most affordable; foot lift, presets, lighting and massage add to the cost. If budget is the main concern, a simple wooden or platform bed frame may suit you better.

Limited design options. Adjustable bases suit modern bedrooms best. They can look out of place in a very traditional room, though a bed skirt hides the base and many accept a headboard with brackets. Footboards usually don't work, because a retainer bar at the foot keeps the mattress in place.

Complexity and maintenance. Motors, control boxes and remotes are what make an adjustable bed work, and they can wear out or fail over time. Repairs usually need the manufacturer's help, so check what the warranty covers after the first couple of years.

Weight and noise. Adjustable bases are heavy: Turmerry's weigh about 77 to 95 pounds for a twin XL and up to about 190 pounds for a king (two bases), and it takes two people to set one upright. Most modern motors are quiet, but you may still hear a hum while the base moves.

Factors You Should Consider When Seeking Adjustable Bed Frames

Now that you know the sizes and the pros and cons, here's what to check before you buy an adjustable base.

Bedroom Type

Whether you have a small studio or a spacious primary suite, your room's size and style shape which base makes sense. Measure the room, then compare it with the minimum room size for the base you want (see the chart above). Leave space for walking, nightstands and doors that need to swing open.

Style-wise, adjustable bases fit modern rooms most naturally. Think about how the base will look with your existing furniture, and whether you want to keep a headboard. Our headboard size guide can help.

Weight Capacity

Always check the base's maximum weight and what it includes. Turmerry's bases are rated for 750 pounds including the mattress, bedding and sleepers, and that weight should be spread evenly: the base isn't designed to lift the full limit using only the head or foot section. Limits vary by model and brand, so add up your mattress weight and everyone who'll use the bed before you choose.

Going over the limit strains the motors and frame and can void the warranty. If you have a heavy mattress or share the bed, add everything up and leave some room to spare. On a split base, ask the maker how the limit applies to each side.

Bed Height

Bed height affects how easy it is to get in and out of bed. To estimate it, add the leg height, the base's profile and your mattress thickness. Turmerry's A1 has a 3-inch profile with 9-inch legs, and the A2, A3 and A4 have a 4-inch profile with 12-inch stackable legs, so you can remove leg segments for a lower bed. If you have mobility needs, choose legs that put the top of the mattress at a comfortable sitting height for you.

Also check the height against your nightstands and headboard, so the bed looks right with your other furniture.

Personal Budget

Set a budget before you shop. It narrows down your options and helps you avoid paying for features you won't use. A head-only base covers reading and TV; if you want knee lift or zero-gravity, you'll need foot articulation; presets, lighting, massage and USB ports cost more again. Prices change, so compare current prices on each product page.

Mattress Type

Not every mattress works on an adjustable base. Latex, memory foam and hybrid mattresses with individually wrapped pocket coils are the usual choices, because they bend with the base.

Latex mattresses and memory foam mattresses are made of foam layers and fabric, so they flex easily. Hybrid mattresses with pocket coils can also flex enough for an adjustable base.

Traditional innerspring mattresses with interconnected coils, water beds and air mattresses are better on a regular platform frame, because their parts don't bend well. If you're not sure whether your mattress can go on an adjustable base, check with the manufacturer.

Mattress Aspects

Besides the type, consider the mattress's thickness, weight and firmness. Thinner mattresses bend more easily; many base makers suggest staying at about 12 inches thick or less, and very thick or very firm mattresses aren't recommended. A heavier mattress uses more of the base's weight limit, so include it when you add up the total.

Firmness plays a smaller role. Softer and medium mattresses usually bend a little more easily than very firm ones, but most latex mattresses flex well at any firmness. Our mattress firmness scale explains the levels.

Health Conditions

Many people shop for an adjustable base because a doctor suggested sleeping with their head or legs raised, or because lying flat isn't comfortable for them. A base makes those positions easy to set and repeat, and extras like massage are nice for relaxing at the end of the day.

Still, an adjustable base doesn't treat or cure snoring, sleep apnea, reflux, back pain, joint pain or circulation problems, and no single position suits everyone. If you're buying one for a health reason, ask your doctor which position and angle are right for you first.

Lifestyle Factors

Do you rearrange your bedroom often or move every year or two? A heavy base is more work to move, though foldable models help. If you work, read or watch TV in bed, features like a wireless remote, saved positions and USB ports can be worth paying for.

Extra Features

Common extras include USB ports for charging devices, a wireless remote, programmable presets, under-bed lighting, massage, height-adjustable legs and a wall-hugging design that keeps you close to your nightstand as the head rises. Some come on most bases, while others only on higher-end models, and each one adds to the price. Pick the features you'll actually use.

Setting Up

Some adjustable bases need professional installation, while others are easy to set up yourself. Read the assembly instructions, reviews or the retailer's FAQ before you order. Turmerry's A3, for example, arrives mostly assembled: you unfold the base, screw in the legs by hand, plug in the power cords and attach the mattress retainer bar, with no tools needed. Two people are recommended to turn the base upright, and a surge protector is recommended.

Bed Warranty

Don't forget the warranty. Adjustable base warranties are often long, but coverage usually changes over time, so read the details. Turmerry's bases have a 10-year limited manufacturer warranty: for the first 2 years, defective parts, labor and transportation are covered, and later years cover fewer parts and costs. Registration is required, and the warranty page has the full terms.

What Is the Perfect Mattress for Adjustable Bed Bases?

Adjustable bases don't work with every mattress. The ones that do have these qualities:

• Flexible: the mattress should bend with the base without strain. Latex and memory foam bend easily, which is why they're popular on adjustable beds. A mattress around 8 to 12 inches thick flexes most easily.
• Non-rigid: avoid mattresses with rigid parts, such as traditional innersprings with interconnected coils. They don't bend well with the base and can be damaged.
• Resilient: a resilient mattress springs back to shape after it's bent, so it keeps its support and comfort after years of adjustments.
• Size-compatible: the mattress should be the same size as the base. If you're choosing a queen mattress, pick a queen base.
• All-foam or all-latex: mattresses made entirely of foam layers, such as memory foam or latex, are well suited to adjustable bases and less likely to be damaged by bending than innerspring mattresses.

Hybrid mattresses with pocket coils also work on most adjustable bases. The FAQ on our A3 adjustable base says all Turmerry mattresses work great on it, with the 7 Zone Organic Latex Mattress, the Organic Latex Hybrid Mattress and the DIY Hybrid Mattress as top picks. Our latex mattresses are separate latex layers inside a zippered organic cotton cover, so you can unzip it, see the layers and swap one if a side doesn't feel right, and they come with a 120-night trial. Our mattress warranty lists a properly configured adjustable base as a suitable foundation. You can compare them all on our mattresses page.

Box Springs, Sheets and Headboards on an Adjustable Base

Once you've picked a size, a few practical questions come up about what goes on, under and around the base.

A waterproof mattress protector is a good idea on any bed, and it's required by our mattress warranty. Choose one in the same size as your mattress so it stretches with the bed as it moves.

The Bottom Line

Adjustable bed sizes match mattress sizes: twin (38 x 75 inches), twin XL (38 x 80), full (54 x 75), queen (60 x 80), king (76 x 80) and California king (72 x 84), plus split queen, split king and split Cal king bases made of two halves. Pick the base in the same size as your mattress and make sure your room has about 2 feet of space around it.

If you'd like each side of the bed to move on its own, plan the mattress setup along with the base. And before you buy, check the weight limit, bed height, setup, warranty and return policy. Questions about pairing a Turmerry mattress with an adjustable base? Call us at 984-299-6850.

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Disclaimer: What is said in this article has been referenced from multiple sources and is intended only for educational and informational purposes. Please note that no content in this article is a substitute for professional advice from a qualified doctor or healthcare provider. Always consult an experienced doctor with any concerns you may have regarding a health condition or treatment, and never disregard any medical suggestions or delay in seeking treatment because of something you read here.