Shopping for a new bed? The California King is the longest standard mattress in the U.S. — but most buyers get its exact measurements wrong before they buy.
This guide gives you a clear California King dimensions chart in inches, feet, and centimeters. You’ll know exactly what fits your room, your body, and your budget.
California King Size Dimensions Chart (Inches, Feet & CM)
A California King mattress measures 72 inches wide by 84 inches long. That’s 6 feet wide and 7 feet long — the longest of any standard bed size sold in America.
It covers 6,048 square inches of sleeping surface. That’s just 32 square inches less than a Standard King, but the shape is noticeably narrower and much longer.
California King Dimensions Chart — Full Size Breakdown
| Bed Size | Inches | Feet | CM | Sq. Inches |
|---|---|---|---|---|
|
California King
|
72″ × 84″ | 6 ft × 7 ft | 182 × 213 | 6,048 sq in |
|
Standard King
|
76″ × 80″ | 6.3 ft × 6.7 ft | 193 × 203 | 6,080 sq in |
|
Queen
|
60″ × 80″ | 5 ft × 6.7 ft | 152 × 203 | 4,800 sq in |
|
Twin XL
|
38″ × 80″ | 3.2 ft × 6.7 ft | 97 × 203 | 3,040 sq in |
California King vs. Standard King — What the Dimensions Actually Mean
Many shoppers assume the California King is bigger than the Standard King. It’s not. The Cal King trades width for length — 4 fewer inches across, 4 more inches down.
If you’re 6’2″ or taller, the Cal King’s 84-inch length keeps your feet on the mattress. For couples who need side-by-side space, the Standard King’s 76-inch width wins every time.
California King vs. Standard King — Side-by-Side Comparison
| Feature | California King | Standard King |
|---|---|---|
|
|
72 inches | 76 inches |
| Length | 84 inches | 80 inches |
| Surface Area | 6,048 sq in | 6,080 sq in |
| Best For | Tall sleepers (6’2″+) | Couples, wider space |
| Min. Room Size | 12 ft × 14 ft | 12 ft × 12 ft |
| Bedding Availability | Limited | Widely Available |
What Room Size Do You Need for a California King Bed?
The minimum room size for a California King is 12 feet × 12 feet. But it feels cramped. A more comfortable layout needs 12 feet × 14 feet — especially with nightstands.
Interior designers recommend 24–30 inches of clearance on each side of the bed. Leave at least 36 inches at the foot so you can walk freely and the room feels open.
California King Room Size Guide
| Room Fit | Room Size | Notes |
|---|---|---|
| Minimum | 12 ft × 12 ft | Tight — workable |
| Recommended | 12 ft × 14 ft | Comfortable clearance |
| Ideal | 13 ft × 15 ft+ | Plenty of space |
| Side Clearance | 24–30 inches | Each side of bed |
| Foot Clearance | 36+ inches | For easy movement |
California King Mattress Dimensions for Sheets, Frames & Bedding
This is where many buyers get burned. Standard King sheets do NOT fit a California King. The fitted sheet size for a Cal King is 72″ × 84″ — 4 inches longer and 4 inches narrower than King sheets.
The same rule applies to bed frames and mattress bases. A California King bed frame is a separate, distinct size. Always label-check before buying Cal King bedding, protectors, or toppers.
California King Bedding & Frame Size Chart
California King Bedding & Frame Size Chart
| Item | Cal King Size | Standard King Size |
|---|---|---|
| Flat Sheet | 108″ × 102″ | 108″ × 102″ |
| Fitted Sheet | 72″ × 84″ | 76″ × 80″ |
| Comforter | 104″ × 92″ | 110″ × 96″ |
| Bed Frame | Cal King Only | King Only |
| Pillow Count | 2–4 Standard | 2–4 Standard |
Conclusion
The California King is built for tall sleepers, long bedrooms, and those who want a luxurious, elongated sleep surface. Its 72″×84″ dimensions are unique — and so are its bedding requirements.
Use this California King dimensions chart to confirm your room size, pick the right frame, and shop for correct bedding. Measure once, sleep well forever.
FAQs
What are the dimensions of a California King?
A California King measures 72 inches wide by 84 inches long — or 6 feet by 7 feet. In centimeters, that’s approximately 182 cm × 213 cm. It has a total sleep surface of 6,048 square inches.
What size is a 180×200 cm bed?
A 180×200 cm bed is a European Super King — roughly 71 inches × 79 inches. It is very close to a Standard King (76″×80″) in the U.S., but it’s narrower and slightly shorter. It does not match California King dimensions.
What is a 7ft by 7ft bed called?
A 7 ft × 7 ft bed (84″×84″) is called a Wyoming King. It’s a specialty, non-standard mattress size — larger than both the Standard King and California King. It’s not sold in most retail stores.
Do two twins make a California King?
No. Two Twin XL mattresses pushed together make a Standard King (76″×80″) — not a California King. Twin XLs are 38″×80″ each. A Cal King is 72″×84″, so two twins fall short in length.
Is twin XL the same as California King?
No. A Twin XL is 38 inches wide by 80 inches long. A California King is 72 inches wide by 84 inches long. The Cal King is nearly double the width and 4 inches longer than a Twin XL.
What are the disadvantages of a king-size bed?
A King-size bed requires a large room (at least 12×12 ft), costs more for bedding and frames, and is harder to move through doorways. For solo sleepers, the extra width can feel like wasted space.
Burhan Ali is the founder and author of DimensionsChart.com, providing accurate size charts, measurements, and guides for smarter buying decisions.
