What’s The Dimensions Of a California King Mattress? Size Guide & FAQs

If you’re asking “What’s The Dimensions Of a California King Mattress”, you’re likely trying to figure out if this extra-long bed will fit your room, your frame, and your lifestyle. This guide walks through the exact measurements, how a California king compares to other sizes, and what to consider before choosing one.

What are the exact dimensions of a California king mattress?

A standard California king mattress measures approximately 72 inches wide by 84 inches long.

• Width: 72 inches (6 feet)
• Length: 84 inches (7 feet)

In metric units, that’s often listed as roughly 183 cm x 213 cm.

While these are the most commonly accepted dimensions, minor variations of an inch or so can happen between manufacturers. For most shoppers, though, 72" x 84" is the key number to know.

How is a California king different from a regular king?

People often confuse a California king with a standard king, assuming the California version is bigger in every way. That’s not the case.

Standard King (also called Eastern King):

• About 76" wide x 80" long

California King:

• About 72" wide x 84" long

So compared to a standard king, a California king is:

• 4 inches narrower
• 4 inches longer

That means a California king offers more length but slightly less width. It can feel roomier for taller sleepers from head to toe, but a bit tighter side-to-side.

Why do the dimensions of a California king mattress matter?

Understanding what’s the dimensions of a California king mattress helps you decide if it’s the right fit for your:

• Height: Taller sleepers often appreciate the extra 4 inches of length.
• Room size: A California king can dominate smaller bedrooms.
• Sleeping partners or pets: Narrower width may feel cozier or more crowded, depending on your preferences.

A mattress that’s too long or too wide can make a room feel cramped and limit space for other furniture, walkways, and doors.

Will a California king fit in my bedroom?

A simple rule of thumb: you generally want at least 2–3 feet of open space around the sides and foot of the bed for comfortable movement.

Here’s a quick look at how a California king compares with a few common sizes:

If your bedroom is on the smaller side, placing a California king may leave limited room for nightstands, dressers, or walking space. Measuring your room before deciding is usually the most reliable way to avoid surprises.

Do I need special bedding for a California king?

Yes. Because the dimensions of a California king mattress differ from standard king:

• Fitted sheets: Need to be labeled specifically “California king” to accommodate the 84" length.
• Flat sheets and duvets: Many are sold in California king sizes, but some brands use a combined “king/Cal king” label.
• Mattress protectors and toppers: Also need to match the 72" x 84" footprint for a proper fit.

Using standard king sheets on a California king often leads to short corners or exposed mattress at the foot of the bed.

Is a California king mattress right for tall sleepers?

Many people consider a California king when they:

• Are taller than average and find their feet hanging off shorter beds
• Prefer extra space at the foot of the bed
• Share the bed with pets that sleep near their feet

Because it measures 84 inches long, a California king can feel more comfortable for sleepers who feel cramped on a queen or standard king. However, those who prioritize shoulder-to-shoulder space may still prefer the extra width of a standard king.

What else should I consider before choosing a California king?

When deciding if a California king is right for you, it can help to think about:

• Room layout: Check door swings, windows, and where you plan to place other furniture.
• Bed frame and base: Frames and adjustable bases must match California king dimensions; a standard king frame will not fit properly.
• Moving and setup: The longer length can be trickier in narrow hallways or tight stairwells.
• Future flexibility: If you think you might switch back to a standard king later, note that California king accessories are not interchangeable.

✔️ Quick Mattress Takeaways

Key points consumers should understand about What’s The Dimensions Of a California King Mattress:

• A standard California king mattress measures about 72" wide x 84" long (183 cm x 213 cm).
• It is longer but narrower than a standard king (76" x 80").
• The extra length can be especially helpful for taller sleepers or those who like more legroom.
• California king bedding, frames, and bases must match the 72" x 84" dimensions.
• Always measure your bedroom and consider walking space, furniture placement, and doorways before choosing this size.

Understanding what’s the dimensions of a California king mattress gives you a clear starting point for deciding whether this long, spacious bed fits your room, your sleep habits, and your need for extra legroom.