California King Mattresses

Slightly narrower but longer in length than a King. Cal King mattresses offer the best in comfort especially for taller people, people who share the foot of their bed with a pet or have a narrow bedroom.

Cal King Mattress Frequently Asked Questions

What size is a California King mattress?

Approx. Dimensions: 72” X 83.5” (width x height) / 6,012 sq in / 41.7 sq ft

A Cal King size mattress is the longest offering at around 83.5 inches. Both a King size bed and Queen size bed are approximately 79.5 inches long. A Cal king is about 12” wider than a Queen and 4” narrower than a King.

Want to learn more about the different sizes we offer, check out our mattress size guide.

What is the difference between King and Cal King?

Cal Kings are longer and narrower. The measurements of a regular King are approximately 76 inches in width and 79.5 inches in length. The measurements of a California King are a bit longer and not as wide, the dimensions are approximately 72 inches wide by 83.5 inches long.

King Size Dimensions: 76″ Wide x 79.5″ Long

California King Size Dimensions: 72″ Wide x 83.5″ Long

Read more about the King vs California King differences, here.

How much do California King sized mattresses cost?

A quality Cal King can range anywhere on average from $950 to $5,000. It all depends on the materials used to construct the bed as well as the benefits it offers.

Should I buy a California King size bed online or in-store?

It really comes down to your own personal shopping preference. Some people were born in the age of the internet and online shopping is what they know and are more comfortable with, while others prefer being in-person to shop so they can touch, feel and see the exact product they are investing in. So, there is no right or wrong way to shop for a new bed.

Click here to find a Serta store near you.

Does Serta offer customizable options on Cal King mattresses?

Serta’s innerspring, memory foam, mattress-in-a-box, and hybrid mattresses are all available in California King. Also, most have different cooling and firmness level options to choose from. So no matter your sleep preference and preferred sleeping position (back, stomach and side sleepers, Serta has a model you’ll fall in love with.

Do Serta California King mattresses need a box spring?

The short answer, no. All you technically need is a hard, flat surface to provide the proper support. Some bed frames however may require them. Read more, here.

Do king sized sheets fit on a cal king bed?

Because a Cal King is longer and narrower than a King, fitted King sheets don’t fit properly on a Cal King. However, king-size flat sheets, comforters, and bedspreads can usually be swapped between a standard King and Cal King.

Do you ship internationally?

We only ship within the contiguous United States (lower 48 states) through our website. Unfortunately, shipping to Alaska or Hawaii is not available at this time.

Do you offer financing?

Financing is available directly through our website. We have partnered with Affirm to offer financing or pay-over-time options for our customers. At checkout, you will be given the option to pay through Affirm. If approved, you will be given loan options for 3, 6, or 12 months. All interest is provided up front, there are no hidden fees, and only a soft credit check is done through Affirm's system for approval. After you've confirmed your choice, you will be redirected back to our website to complete checkout.

Affirm only requests a soft credit check for approval, so the credit inquiry won’t affect your credit score. Once you've selected your financing term, you will be redirected back to the website to complete your purchase.

For returns and cancellations, refunds will be processed through Affirm and posted to your Affirm account. Refunds will be processed within 3-10 business days. Keep in mind the interest charge will not be refunded.

Please note that financing through Affirm is not available in West Virginia and Iowa.

Why buy Serta online?

120-Day In-Home Trial

Experience a Serta in your home for up to 120 days. If you’re not completely satisfied, you can exchange or return it for a refund.

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You should be able to rely on the quality of your rest night after night. That’s why every Serta® bed is backed by Serta’s 10-year limited warranty.

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Free Shipping & Returns

All products ship free and feature free returns when you order directly from

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All Serta beds are designed and assembled in the USA, leveraging our 85 years of manufacturing expertise.

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certipur-us® certified

Rest easy knowing Serta uses only CertiPUR-US® Certified Polyurethane Foam.

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Family, woman on the left, young son in the middle and man on the right laying on a mattress asleep

Try in stores

Want to test our products before you buy? Our Sleep Ambassadors will offer you a personalized, no-pressure in-store experience. Don't live near a Serta shop? Learn where else you can find us!

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