Ends 5/27: 50% off mattresses
800.588.5720
Ends 5/27: 50% off mattresses
800.588.5720
Ends 5/27: 50% off mattresses

California King Mattresses

The California King mattress is the longest standard mattress size available, measuring 72” wide by 84” long. BedInABox® California King mattresses take up slightly less space than standard kings, the size difference coming down to preference in length vs. width.

Essential Product Image
9” multilayer foam construction built with our CoolRest® Gel memory foam for any sleeper who wants simple, long-lasting support.
Firmness: Medium-firm
California King $524.50 $1,049
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Original Product Image
11” multilayer foam construction designed with CoolRest® Gel memory foam to bring you cool, comfortable memory foam support.
Firmness: Medium-firm
California King $659.50 $1,319
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Azul® Product Image
11” medium-soft multilayer foam construction with an UltraCool® soft knit cover and our most advanced cooling system to keep you sleeping comfortably.
Firmness: Medium-soft
California King $824.50 $1,649
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Original Hybrid Product Image
11" of our classic CoolRest® Gel memory foam construction, enhanced with spring support for added lift.
Firmness: Medium-firm
California King $769.50 $1,539
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Tranquillium® Product Image
12” and three layers of memory foam support infused with CoolRest® technology for those seeking maximum support and comfort.
Firmness: Firm
California King $934.50 $1,869
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BedInABox® Dual Hybrid® Product Image
13” of premium foam and spring support with the highest coil count in the industry. Advanced pressure relief exactly where you need it.
Firmness: Medium-firm
California King $1,429.50 $2,859
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How big is a California king size mattress?

A California King size mattress is 72 inches wide by 84 inches long.

Mattress Size Chart

Who should sleep on a California King mattress?

Bed Sharing Bed Sharing

California King mattresses give couples enough space to spread out while leaving plenty of leg room for the kids or pets to join.

Primary Suites Primary Suites

Since the California King provides so much space, this mattress size is ideal for larger primary bedrooms.

Tall Adults Tall Adults

California King beds are 84 inches long; 4 inches longer than a standard king and only slightly narrower.

Free shipping, easy returns

Try your California King mattress in a box risk-free for 120 nights. If you don’t love your new BedInABox® after sleeping on it for 60 nights, let us know and we will get the return process started. Details can be found in our Return Policy.

120-night free trial
safe, supportive memory foam

Safe, luxurious sleep

All BedInABox® California King size mattresses use carefully crafted BedInABox® memory foams that are CertiPUR-US® certified. This means that the foam has been tested by accredited labs and has been certified as safe to sleep on for the whole family. We use multiple layers of our house-made memory foam to provide the perfect balance of support and pressure relief, for sleepers of all ages.

Sleep now, pay later

We partner with Affirm to offer flexible financing options, so you can pay with fixed monthly payments with rates between 0-30% APR. Simply select Affirm at checkout and complete an application that won’t affect your credit score. Prequalify Now.

sleep now, pay later

Buying a Foundation for a California King Size Bed

Create a more supportive sleeping experience by pairing your California King size mattress with a California King size foundation. A mattress foundation serves as a base for your mattress and generally uses solid planks or slats to support and lift your mattress off the ground. There are different types of foundations suited to different mattresses and sleep preferences, BedInABox® currently offering two options compatible with a Cal King mattress: a slatted foundation and a platform foundation.

Clever Connect™

Provides simple, slatted support for memory foam or hybrid mattresses. This sturdy foundation is available in a 5” profile or an 8” profile and can be paired with optional foundation legs for additional height.


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Clever Connect™
Platform BedInABox®

Platform BedInABox®

Best described as a combination of a standard mattress foundation and a decorative bed frame, our upholstered platform offers a slightly lower profile than pairing a solid foundation with a separate bed frame and is compatible with all BedInABox® mattresses.


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Which California King Size BedInABox® is right for you?

Essential Product Image
Essential

Our 9” Essential mattress is a simpler take on our Original Mattress, utilizing the same dual layer memory foam technology in a slightly thinner, medium-firm mattress profile.

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Original Product Image
Original

The Original mattress is our classic 11” dual-layer memory foam mattress. The two layers combine plush, temperature regulating comfort and medium-firm support to provide the perfect level of contouring alignment.

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Azul® Product Image
Azul®

The Azul® mattress features 11” of cooling comfort. The dual layer medium-soft mattress tops multiple layers of phase change material with an UltraCool® soft knit cover to offer our most advanced cooling system.

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Original Hybrid Product Image
Original Hybrid

11" of our classic CoolRest® Gel memory foam construction, enhanced with spring support for added lift.

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Tranquillium® Product Image
Tranquillium®

The Tranquillium® mattress is built with 12” and three layers of firm memory foam to maximize support without sacrificing comfort.

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BedInABox® Dual Hybrid® Product Image
BedInABox® Dual Hybrid®

The Dual Hybrid® mattress is 13” of premium comfort, combining the support of memory foam and springs. The BedInABox® hybrid mattress features the highest coil count in the industry to provide ultimate lift, support and pressure relief exactly where you need it.

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Find your california king size mattress


Made in the USA with the most premium foams and materials, all of our California King mattresses are backed by a 20-year limited warranty so you can rest easy, night after night.


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Find your california king size mattress


Made in the USA with the most premium foams and materials, all of our California King mattresses are backed by a 20-year limited warranty so you can rest easy, night after night.


Shop Mattresses

Frequently Asked Questions

What is the standard size of a California King mattress?

What is the difference between a king and a California King?

The California King mattress is 72” wide by 84” long, making it 4 inches longer than a standard king mattress. Compared to the king-sized mattress, a California King is actually narrower by 4 inches, coming in at 72” in width versus the standard 76” wide king size. Overall, the California King takes up slightly less total sleep space.

How many BedInABox® mattresses come in the California King size?

Five of our six BedInABox® mattresses are available in the California King size. The only BedInABox® mattress not currently offered in the California King size is the Eco-Lux®.

What size room fits a California King mattress?

If you are looking to upgrade your mattress to the California King size, we suggest rooms with at least 150 square feet of living space to accommodate the larger mattress comfortably.
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King vs California King Mattresses

KING VS CALIFORNIA KING MATTRESSES

A BedInABox® standard king mattress measures 76” x 80”, and a California King measures 72” x 84”. The essential difference between a king size [...]


Find your perfect mattress in a box

Compare the industry-leading quality, comfort & support of BedInABox® memory foam mattresses to some of our biggest competitors in the sleep business.

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