What Are The Measurements Of a California King Size Mattress? Exact Dimensions & Helpful FAQs
If you’re asking “What Are The Measurements Of a California King Size Mattress?”, you’re likely trying to figure out whether this extra-long mattress will fit your room, your bed frame, and your bedding. This guide walks through standard California king dimensions, how they compare to other sizes, and what to consider before choosing one.
What Are The Measurements Of a California King Size Mattress?
A standard California king size mattress measures approximately:
- 72 inches wide x 84 inches long
- 183 cm wide x 213 cm long
That means a California king is 4 inches longer and 4 inches narrower than a standard king mattress (also called an Eastern king).
While these are widely accepted standard dimensions, actual measurements can vary slightly by manufacturer, often by an inch or so in either direction.
Why Do California King Measurements Matter?
Understanding What Are The Measurements Of a California King Size Mattress matters for several reasons:
- Room fit: A California king takes up a significant amount of floor space, especially in length. Knowing the exact dimensions helps you plan your layout.
- Bed frame compatibility: Frames, foundations, and adjustable bases must match the 72" x 84" footprint.
- Bedding and accessories: Sheets, mattress protectors, and toppers need to be labeled “California king,” not just “king.”
- Sleeper comfort: Taller sleepers often look for the extra length so their feet don’t hang off the end.
A California king is usually chosen by people who prioritize extra foot room over maximum width.
How Does a California King Compare to a Standard King?
Here’s a simple comparison to show the difference:
| Mattress Size | Width (in) | Length (in) | Best for |
|---|---|---|---|
| King | 76 | 80 | Couples wanting maximum width |
| California King | 72 | 84 | Taller sleepers, long but narrower rooms |
So while the total surface area is similar, the shape is different:
- King: Wider, slightly shorter
- California king: Narrower, longer
This shape difference is why it’s important to know exact measurements before buying frames or bedding.
Will a California King Fit in My Bedroom?
To decide if a California king will work, measure your room and leave space for walking and furniture. A common guideline is to have at least 2–3 feet of clearance on each side and at the foot of the bed where possible.
Consider:
- Room length: The 84" (7 feet) mattress length plus any headboard or footboard.
- Doorways, closets, and windows: Make sure the longer bed won’t crowd openings.
- Other furniture: Dressers, nightstands, and seating need room as well.
For long, narrow rooms, a California king can sometimes fit better than a standard king because of its slightly reduced width.
Do All California King Mattresses Have the Same Measurements?
Most California king mattresses follow the 72" x 84" standard, but there are a few points to keep in mind:
- Small variations: Some mattresses may measure about 1 inch shorter or longer, depending on materials and style.
- Pillow tops and euro tops: Added cushioning can make the mattress appear slightly larger, and can change the effective height.
- Foam vs. hybrid vs. innerspring: Construction can subtly affect how the edges hold shape and feel in terms of usable surface.
If precise measurement is important—for a tight frame or built-in furniture—it's wise to measure the actual mattress once unboxed.
Can I Use Regular King Sheets on a California King?
In most cases, no. Standard king and California king mattresses are not interchangeable when it comes to bedding.
- King sheets: Designed for 76" x 80"
- California king sheets: Designed for 72" x 84"
Using king sheets on a California king often leads to:
- Sheets that are too short at the foot of the bed
- Difficulty securing the fitted sheet over the corners
Look specifically for “California king” on packages for:
- Fitted sheets
- Flat sheets
- Mattress protectors
- Bed frames and foundations
- Mattress toppers and pads
✔️ Quick Mattress Takeaways
Key points consumers should understand about “What Are The Measurements Of a California King Size Mattress”
- Standard size: A California king mattress is 72" wide x 84" long (about 183 cm x 213 cm).
- Different from king: It is narrower but longer than a standard king (76" x 80").
- Best for height: Often chosen by taller sleepers or for longer rooms.
- Room planning: Allow extra length in your room layout and leave walking space around the bed.
- Bedding needs: Always choose California king–specific sheets, protectors, and toppers.
- Minor variations: Thickness and exact dimensions can vary slightly between manufacturers.
Understanding What Are The Measurements Of a California King Size Mattress helps you avoid common sizing surprises—like sheets that don’t fit or frames that are the wrong size. With the standard 72" x 84" dimensions in mind, you can plan your bedroom, choose appropriate accessories, and decide whether this extra-long size matches your space and sleep needs.
