What Size Mattress Is a California King? Dimensions, Fit, and FAQs
If you’re wondering “What Size Mattress Is a California King” and how it compares to other mattress sizes, you’re not alone. California king beds can be confusing because of the name—they sound larger than a standard king, but the shape and measurements are different.
This FAQ-style guide explains the exact dimensions of a California king mattress, how it compares to other sizes, and what to consider before choosing one.
What size mattress is a California king in inches and centimeters?
A California king mattress is typically:
- 72 inches wide x 84 inches long
- Approx. 183 cm wide x 213 cm long
So, when people ask “What Size Mattress Is a California King”, the key point is that it’s narrower but longer than a standard king mattress.
How is a California king different from a standard king?
A common misconception is that a California king is simply a “bigger” version of a king. In reality, the proportions are different.
Here’s a simple comparison:
| Mattress Size | Width (in) | Length (in) | Best For |
|---|---|---|---|
| Queen | 60 | 80 | Most couples, single adults |
| King (Standard) | 76 | 80 | Couples wanting maximum width |
| California King | 72 | 84 | Taller sleepers, narrower rooms with length |
Key difference:
- A king is wider (76") and shorter (80").
- A California king is narrower (72") and longer (84").
If you value extra legroom more than extra elbow room, a California king often makes more sense.
Who is a California king mattress best suited for?
When considering What Size Mattress Is a California King, it helps to think about who typically benefits from it:
- Taller sleepers who find their feet hanging off a queen or standard king
- Couples who don’t mind slightly less width but want more length
- Rooms that are long and narrow, where a wider king might feel cramped
- People who like to sleep with pets at the foot of the bed, and want more space lengthwise
If you’re under average height and love spreading out sideways, a standard king might feel roomier. If you’re taller or your room shape is long, the California king’s extra length can feel more comfortable.
Will a California king mattress fit in my bedroom?
Knowing What Size Mattress Is a California King is just the first step—next is measuring your space.
A general guideline for comfort:
- Leave at least 24–30 inches of walking space around the sides and foot of the bed.
- Consider other furniture like dressers, nightstands, or desks.
📝 Simple check:
- Room width: A California king (72" wide) plus walking space on both sides can work well in rooms around 12 feet wide or larger, depending on layout.
- Room length: The 84" mattress length, plus headboard and foot space, can make shorter rooms feel tight.
Can California king sheets and bedding fit a regular king?
No. California king and standard king bedding are not interchangeable.
Because the dimensions differ:
- California king sheets are cut longer and a bit narrower.
- Standard king sheets are wider and shorter.
If you choose a California king, you will need:
- California king–specific fitted sheets
- Comforters or duvets labeled Cal king for the best fit
Using the wrong size may mean the fitted sheet pops off or the bedding doesn’t fully cover the mattress length.
Is a California king mattress bigger than a king overall?
In total surface area:
- King (76" x 80") = 6,080 square inches
- California King (72" x 84") = 6,048 square inches
They are very close in total size, but the shape is different:
- California king: longer and slimmer
- Standard king: shorter and wider
So when people ask “What Size Mattress Is a California King compared to a king?”, the best summary is:
not really bigger—just longer and narrower.
What should I consider before choosing a California king?
When deciding if a California king is right for you, think about:
- Your height: Taller sleepers often appreciate the 84" length.
- Sleeping partners: Couples who like more side-to-side space may prefer the wider standard king.
- Room layout: Long, rectangular rooms often suit a California king well.
- Bedding availability: Some areas offer fewer California king bedding options than standard sizes.
- Bed frame and accessories: Make sure your bed frame, foundation, and any headboard or footboard are specifically sized for a California king.
✔️ Quick Mattress Takeaways
Key points consumers should understand about What Size Mattress Is a California King
- Standard size: A California king mattress is typically 72" wide x 84" long (about 183 cm x 213 cm).
- Shape vs. king: It is narrower but longer than a standard king, not simply “bigger.”
- Best for:Taller sleepers and long, narrow rooms where extra length matters more than width.
- Bedding needs: You’ll need California king–specific sheets and bedding; standard king sets do not fit properly.
- Space planning: Check that your room leaves comfortable clearance around the bed, especially at the foot, due to the added length.
Understanding What Size Mattress Is a California King—in exact dimensions and in practical use—helps you choose a mattress that fits both your body and your bedroom comfortably.
