A California king mattress measures 72 x 84 inches. That is 6 x 7 feet, or about 183 x 213 cm.

This guide shows how it compares with a king and a queen, who it suits, and what fits around it.

California King Mattress Dimensions Chart

The Cal king mattress size is the same across US brands. It is narrower than a standard king and longer by a few inches. That extra length is the whole point of the size.

Unit	Width	Length
Inches	72 in	84 in
Feet	6 ft	7 ft
Centimeters	182.9 cm	213.4 cm
Millimeters	1,829 mm	2,134 mm

California King Size in Inches and Feet

The California king size in inches is 72 wide by 84 long. In feet, it is a clean 6 by 7. That is easy to picture. A standard door is about 6 ft 8 in to 7 ft tall, so the bed is roughly as long as a door is high.

The surface area is 6,048 square inches, or 42 square feet. Another name for this size is the Western king.

California King Size in CM and Millimeters

To convert, multiply inches by 2.54. The California king size in cm is 182.9 x 213.4. Most sellers round it to 183 x 213 cm.

In millimeters, that is 1,829 x 2,134 mm. Use these numbers when you order a frame or sheets from a metric catalog.

Mattress Thickness & Weight

Most Cal king mattresses are 9 to 12 inches thick. Pillow-top and luxury hybrids can run thicker. Height matters for sheets, because thick mattresses need deep-pocket sheets.

Weight depends on the build. Memory foam, hybrid, latex, and innerspring models differ a lot. Many Cal king mattresses weigh roughly 100 to 200 pounds. Check the product label before you plan the move.

When planning your bedroom layout for a California king mattress, it’s important to consider the overall space and safe movement around your home. Understanding standard stair dimensions can also help you assess whether large mattresses and bed frames can be moved safely through stairways and landings.

Cal King vs King vs Queen Mattress Size

Sizes only make sense side by side. This chart compares the common US sizes.

Size	Inches	CM	Area (sq ft)	Width per sleeper*
Twin XL	38 x 80	96.5 x 203.2	21.1	Single sleeper
Full	53 x 75	134.6 x 190.5	27.6	26.5 in
Queen	60 x 80	152.4 x 203.2	33.3	30 in
King	76 x 80	193.0 x 203.2	42.2	38 in
California king	72 x 84	182.9 x 213.4	42.0	36 in
Alaskan king	108 x 108	274.3 x 274.3	81.0	54 in

*Width per sleeper is the bed width divided by two.

California King vs King

A standard king is 76 x 80 inches. The Cal king is 4 inches narrower and 4 inches longer. The sleeping areas are almost equal: 6,048 vs 6,080 square inches.

So the real choice is shape. Choose the king for width. Choose the Cal king for length.

California King vs Queen

A queen is 60 x 80 inches. The Cal king is 12 inches wider and 4 inches longer. That is about 26% more sleeping area.

Two adults get 36 inches each on a Cal king. On a queen, each gets 30 inches. That gap is the difference between sharing and sprawling.

Cal King vs Alaskan, Texas & Western King

Western king is just another name for the Cal king. Bigger sizes exist, but they are rare.

• Texas king: 80 x 98 inches.
• Wyoming king: 84 x 84 inches.
• Alaskan king: 108 x 108 inches.

Most of these need special sheets and a custom frame. Few stores stock them.

Split Cal King vs Two Twin XL or Two Full Beds

A split Cal king is two mattresses, each 36 x 84 inches. Each side can have its own firmness. It also works with an adjustable base.

Two twin XL beds measure 76 x 80 inches together. That is a king, not a Cal king. Two full beds measure 106 x 75 inches. That is much wider and shorter than a Cal king.

Who Needs a California King Size Bed?

A Cal king is not just a bigger bed. It is a longer one. That helps some sleepers more than others.

Tall Sleepers (6 Ft 2 In and Over)

The CDC reports that the average US adult man is 68.9 inches tall, and the average woman is 63.5 inches (CDC National Center for Health Statistics). A sleeper well above that line runs out of room on a standard bed.

Here is the math. A 6 ft 2 in sleeper is 74 inches tall. On a Cal king, that leaves 10 inches of foot room. On a standard king, it leaves 6. For a 6 ft 6 in sleeper (78 inches), it is 6 inches vs 2.

Couples, Kids & Pets

Each adult has 36 inches of width. That works for most couples. A dog at the foot of the bed is a bonus, since the extra length gives pets space without crowding your feet.

If your family piles in with kids and pets, a standard king has a little more width. Think about how you actually sleep.

Long, Narrow Bedrooms

Some rooms are longer than they are wide. A Cal king uses that length. It leaves more side room than a standard king in a narrow space.

Who Should Skip a Cal King

Pick a standard king if you or your partner sprawl sideways. Pick a queen if the room is under 12 x 12 feet. Short sleepers get nothing from the extra 4 inches.

Room Size, Bed Frame & Bedding for a Cal King

The mattress is only part of the footprint. Plan the room, frame, and sheets too.

Minimum Room Size & Walking Space

The usual minimum for a Cal king is a 12 x 12 foot room (144 square feet). A 12 x 14 foot room or larger is better. The bed alone takes 42 square feet, about 29% of that floor.

Leave 24 to 30 inches of walking space on each side. About 36 inches at the foot is easier. In a 12 x 12 room, a centered Cal king leaves 36 inches per side and 60 inches at the foot. Nightstands eat into that quickly.

California King Bed Frame Dimensions

A frame is larger than the mattress. Expect 74 to 77 inches wide and 86 to 89 inches long. A headboard adds depth.

Use a frame sized for a Cal king. A platform bed suits foam, latex, and hybrid models. A box spring or foundation suits innerspring. Always check the frame’s weight limit too.

Sheets, Toppers & Protectors

King sheets will not fit a Cal king. The sizes are different. Buy Cal king fitted sheets, a Cal king mattress protector, and a Cal king topper.

A mattress over 12 inches thick needs deep-pocket sheets. A waterproof protector is worth it for kids and pets.

Delivery Fit: Doors, Stairs & Hallways

Measure the path before you order. Interior doors are often 30 to 32 inches wide. Boxed mattresses squeeze through. Rigid foundations may not.

Check tight corners, stairwells, and elevators. A split foundation is easier to carry.

Cal King Size in Other Countries (CM Conversions)

Bed names change from country to country. A “king” in one place is a “queen” in another. Always check the numbers.

US Cal King vs EU, UK & Australia Sizes

The US Cal king is 183 x 213 cm. In New Zealand, some brands sell a “California king” at 203 x 203 cm. That is square, and it matches the Australian super king.

Do not mix the two. A 203 x 203 cm bed is 80 x 80 inches. It is wider than a US Cal king and 4 inches shorter.

180 x 200 CM and 160 x 200 CM Explained

180 x 200 cm is about 70.9 x 78.7 inches. In Europe it is often sold as a king. In the UK, it is called a super king. It is slightly smaller than a US king.

160 x 200 cm is about 63 x 78.7 inches. That is a queen in Europe. It is a bit wider than a US queen.

Common Size Conversion Table

Size	Inches	CM
US California king	72 x 84	182.9 x 213.4
US king	76 x 80	193.0 x 203.2
US queen	60 x 80	152.4 x 203.2
EU king (180 x 200)	70.9 x 78.7	180 x 200
EU queen (160 x 200)	63.0 x 78.7	160 x 200
6 x 6 ft mattress	72 x 72	182.9 x 182.9
NZ/AU “California king”	79.9 x 79.9	203 x 203

FAQs About California King Mattress Dimensions

Is a California King 2 full size bed?

No. Two full beds side by side measure 106 x 75 inches. A Cal king is 72 x 84 inches. Two fulls are 34 inches wider and 9 inches shorter. A split Cal king is two 36 x 84 inch halves, and two twin XLs make a standard king.

Is a Cal king bigger than a queen?

Yes. A Cal king is 12 inches wider and 4 inches longer than a queen. It has about 26% more sleeping area: 6,048 vs 4,800 square inches.

What size mattress is 72×84?

A 72 x 84 inch mattress is a California king. It is also called a Western king. In feet, it is 6 x 7.

Is 180×200 cm a king size bed?

Often, outside the US. In Europe, 180 x 200 cm is sold as a king. In the UK, it is a super king. A US king is 193 x 203 cm, so it is about 5 inches wider than 180 x 200 cm.

Is 160×200 king or queen?

Queen. A 160 x 200 cm bed (about 63 x 78.7 inches) is a queen in most of Europe. It is 13 inches narrower than a US king.

Is a 6 * 6 mattress king size?

Not in the US. A 6 x 6 foot mattress is 72 x 72 inches. A US king is 76 x 80 inches, so it is 4 inches narrower and 8 inches shorter. Some sellers in South Asia label 6 x 6 as “king.” In the US, shop for a king or Cal king instead.

Conclusion

A California king is a 72 x 84 inch bed built for length. It fits tall sleepers and long rooms. Measure your room, your doors, and your sleep style before you buy.