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What is the Difference Between an Eastern King and a California King Size Mattress?

White bedroom with an eastern king (standard king) size bed.
A California king size mattress is 4 inches longer and 4 inches narrower than an Eastern king size mattress.
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  • Originally Written By: R. Kayne
  • Revised By: A. Joseph
  • Edited By: Niki Foster
  • Last Modified Date: 17 December 2014
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Shopping for a mattress can get a little confusing with all of the different sizes available. Aside from standard twin, twin long, double, full and queen beds, there are two types of king size mattresses that each have two different names. The difference between an Eastern king size mattress and a California King size mattress is that the California king is 4 inches (10.2 cm) longer and 4 inches (10.2 cm) narrower.

Eastern King

The Eastern king size mattress, also known as a standard king, is the widest mattress that is commonly available. At 76 inches (193 cm) wide and 80 inches (203.2 cm) long, it is the mattress of choice for many large adults or couples who want a lot of room for spreading out in their beds. It is 18 inches (45.7 cm) wider than a queen bed and allows each person 38 inches (96.5 cm) of room — about the same amount of room that pushing two twin beds together would provide. An Eastern king size mattress typically comes with two twin box springs that fit side-by-side for easy transportation.

California King

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The California king size mattress, also called a Western king, is the longest mattress that is commonly available. At 84 inches (213.4 cm) long, it is 4 inches (10.2 cm) longer than the Eastern king and is preferred by many people who are more than 6 feet (1.8 m) tall. Like an Eastern king, it typically comes with two twin box springs. For some people, the drawback of this mattress is that, at 72 inches (182.9 cm) wide, it is 4 inches (10.2 cm) more narrow than the Eastern king.

A Matter of Preference

People who want a king size mattress for its length more than its width often choose the California king. If the extra length is not required, such as for people who are shorter, the accommodating width of an Eastern king size mattress is often preferred. To get the length of a California king and the width of an Eastern king, a custom-made mattress is likely to be needed.

Sheet Shopping

The difference between an Eastern king and a California king can be a factor when a person is shopping for a set of bed sheets. Someone who knows that he or she needs king size sheets but doesn't know whether the bed is an Eastern king or California king — or doesn't even know that there are two types of king size mattresses — could end up with sheets that are too short and wide or too long and narrow. If the type of king size mattress is not specified on its label, it might be necessary for its owner to measure the mattress before shopping for sheets.

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Discuss this Article

anon266176
Post 23

There is a grand king sleep number bed. Sleep Number is the only one that makes this size of bed.

anon222850
Post 22

Thanks, Post 14, for that info! I'd love to have a Grand King. Sounds divine.

anon159411
Post 20

What I see online as info a lot of times is wrong!

I have been in the bed business nine years.

To answer a lot of the questions here: 1.) there are only 2 sizes of king beds King and Cal-king. (measurements are 76x80 and 72 by 84. These sizes are approximate and can be off a little.

Cal-king mattress come in all depths-measure, European mattresses are metric and do not fit here. There are only king and cal-king sheets in the US. Most headboards adjust from king to cal-king. Some do not.

anon154665
Post 19

I have a California King mattress, 72in x 84in. I buy standard king sheets all the time. No, they don't fit "like they should", but they do fit the bed just fine. The whole mattress is covered. The only weird thing is for the top sheet, on some of my sets, I have to turn it side-ways so it tucks into the bottom of the bed.

anon139814
Post 18

Can anyone please tell me where I can buy Eastern King bed sheets?

anon137119
Post 17

how thick is a california king mattress?

anon88526
Post 16

Where would I look for grand king sized bed sheets and duvets? --slim

anon82953
Post 15

I believe there is also a super king, which matches the European style, but seems hard to find here in the US, that measures approx. 72 x 78 inches (180 x 200 cm metric).

anon81868
Post 14

There are actually four different size king beds: The Eastern King (78 x 80), Standard King (76 x 80), California King (72 x 80) and what is called a Grand King (80x98).

anon77239
Post 13

Can anyone please tell me the difference between a California King and a Eastern King Bed Frames? I found a website and I love their prices but I'm confused about the difference in these two sizes.

anon48520
Post 11

Yes, European mattresses are generally longer and not as wide. (does that say something about Europeans vs. Americans? lol)

anon39850
Post 10

what is the size of california king ruffle/bed box cover?

anon31309
Post 9

*Thank you!* For *finally* answering our questions about the differences between the 4 King Beds. The sales people *never* know themselves!! Gosh - I've missed out on so many sales and pretty colors. Thank you for posting this easily understood and excellent needed information.

maryw
Post 8

Will a headboard made for a king size bed fit my cal-king mattress?

somerset
Post 5

I think some European mattress sizes differ from the American measurements mentioned in this article.

malena
Post 4

So then, compared to a Queen Sized mattress (58 x 80 inches), the Eastern King affords a wider (by 16 inches) but just as long mattress, whereas the California King affords a longer (by 4 inches) and wider (by 14 inches) mattress.

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