California king is the mattress size for people who need room from head to toe. A standard king gives you more width. A California king gives you more length. That trade matters for tall sleepers, people who sleep lower on the mattress, and bedrooms that are longer than they are wide.
The footprint is simple: 72 inches wide by 84 inches long. What gets more interesting is how BEDGEAR builds into that footprint. Standard California king gives you one long shared sleep surface. Split Head California King gives each sleeper independent head adjustment while keeping the lower portion connected. And the M-series adds per-side firmness configuration, so both sleepers can stop pretending one feel magically works for two different bodies.
BEDGEAR California King Mattresses
BEDGEAR's California king lineup includes the same 72-by-84-inch footprint across multiple mattress systems. The biggest differences are profile height, firmness options, cooling technology, and whether the mattress supports Split Head California King functionality for adjustable-base use.
| Mattress | Cal King Profile | Firmness Options | Split Head Cal King | Best For |
|---|---|---|---|---|
| S Performance® | 10" Firm/Medium · 12" Plush | S3 Firm · S5 Medium · S7 Plush | No | Longest entry-point comfort option |
| H Performance® | 12" | H4 Medium Firm · H6 Medium Plush | Yes | Hybrid support with split-head availability |
| M3 Performance® | 12" | 0.0 Firm → 3.0 Plush per side | Yes | Modular comfort for tall couples |
| M3 Night Ice® | 12" | 0.0 Firm → 3.0 Plush per side | Yes | Cooling + per-side setup |
| M5 Performance® | 14" | 0.0 Firm → 3.0 Plush per side | Yes | Advanced modular support |
| M5 Night Ice® | 14" | 0.0 Firm → 3.0 Plush per side | Yes | Maximum cooling + maximum customization |
A Split Head California King keeps the same 72" × 84" footprint, but the head section is split so each side can adjust independently on a compatible split-head adjustable base. It is not the same as a split king, which uses two Twin XL mattresses side by side.
S Performance® California King — Best Entry Point
The S Performance® California King gives taller sleepers the long 84-inch surface without jumping into a modular build. Firm and Medium profiles sit at 10 inches tall, while Plush sits at 12 inches. That makes sheet fit straightforward for most Cal King bedding, especially compared with taller 14-inch modular models.
This is the practical pick for sleepers who want a longer mattress, a clear firmness choice, and BEDGEAR's breathable performance construction without adding split-head functionality. It is especially useful for guest rooms or primary bedrooms where the extra length matters more than side-by-side customization.
Cool-to-the-touch California king mattress with three firmness options, conforming React™ foam, and breathable Air-X® side panels.
H Performance® California King: Best Hybrid Support
The H Performance® California King is the hybrid option: foam comfort layers above individually wrapped coils. That pairing gives taller sleepers pressure relief without giving up support, airflow, or responsiveness. Both H4 Medium Firm and H6 Medium Plush come in a 12-inch profile.
For couples who want the longer Cal King footprint and a more traditional hybrid feel, H Performance® is the clean middle lane. It also matters in the split-head conversation because BEDGEAR's H lineup supports split-head sizing, giving adjustable-base couples another option before jumping into the modular M-series.
Hybrid California king mattress with foam comfort layers, individually wrapped coils, breathable airflow, and two balanced firmness options.
M3 Performance® California King: Best Modular Upgrade
The M3 Performance® California King brings BEDGEAR's modular system into the longest standard mattress footprint. Each side can be configured from 0.0 Firm to 3.0 Plush, so one sleeper can go firmer while the other goes softer without needing two separate mattresses.
At 12 inches tall, the M3 keeps the Cal King profile manageable while adding a serious level of personalization. The modular Independent Suspension™ units are the key: they let the mattress match each sleeper's preferred feel inside one shared 72-by-84-inch setup.
Modular California king mattress with per-side firmness, a washable zip-off cover, breathable airflow, and independent suspension units.
M3 Night Ice® California King — Best for Hot Sleepers
The M3 Night Ice® California King takes the M3's modular comfort and adds the Night Ice cooling package. It is built for sleepers who want the longer Cal King footprint and also need the mattress surface to work harder against overheating.
This is a strong fit for tall couples where one person runs hot, one person needs a different firmness, or both things are true because sleep likes to make things complicated. Each side can be configured independently, while the 12-inch profile keeps bedding easier than the taller M5 models.
Cooling modular California king mattress with Night Ice technology, per-side firmness, and split-head availability for adjustable-base setups.
M5 Performance® California King — Most Configurable
The M5 Performance® California King is the taller, more advanced modular option. It keeps the 72-by-84-inch footprint and adds a 14-inch profile with an enhanced React® Comfort Layer, giving sleepers a more substantial comfort system with the same per-side firmness control.
This is the long-term customization play. If you want a Cal King because length matters, but you also want the mattress to adapt as your sleep needs change, the M5 gives you that flexibility. The 14-inch profile does mean deep-pocket sheets are the move. Standard shallow bedding is not invited to this party.
Advanced modular California king mattress with 14-inch profile, enhanced React® Comfort Layer, and per-side firmness configuration.
M5 Night Ice® California King — Top Cooling and Customization
The M5 Night Ice® California King is the top-tier BEDGEAR option for sleepers who want everything: the longest standard footprint, per-side modular firmness, a 14-inch profile, and the strongest cooling package in the lineup.
If your main problems are "I need more length," "I sleep hot," and "we do not agree on firmness," this is the page finally handing you an answer instead of another compromise. It is the most premium Cal King setup in the lineup and the clearest fit for hot-sleeping couples who want long-bed comfort with serious control.
BEDGEAR's most advanced California king mattress with 3X cooling, modular comfort, per-side firmness, and a washable cooling cover.
California King Mattress Dimensions
A California king mattress measures 72 inches wide by 84 inches long. In feet, that is 6 feet wide by 7 feet long. It is 4 inches narrower than a standard king, but 4 inches longer, which is why it is usually the better choice for tall sleepers instead of couples simply chasing more width.
The California King — 72" × 84"
Four inches longer than a standard king and four inches narrower. Built for sleepers who need legroom more than extra width.
| Size | Width | Length | In Feet | Sq Inches | Best For |
|---|---|---|---|---|---|
| Twin | 39 in | 75 in | 3'3" × 6'3" | 2,925 | Kids, bunk beds, tight rooms |
| Twin XL | 39 in | 80 in | 3'3" × 6'8" | 3,120 | College, tall solo sleepers, split king |
| Full | 54 in | 75 in | 4'6" × 6'3" | 4,050 | Solo adults, teens, guest rooms |
| Queen | 60 in | 80 in | 5'0" × 6'8" | 4,800 | Couples, most bedrooms |
| King | 76 in | 80 in | 6'4" × 6'8" | 6,080 | Couples wanting maximum width |
| California King This Page | 72 in | 84 in | 6'0" × 7'0" | 6,048 | Tall sleepers and longer rooms |
The California King vs. Every Other Mattress Size
The California king is not "bigger than king" in every direction, we need to disclose that right now. That being said, the Cali king is longer and narrower. That distinction matters because the right choice depends on whether your body needs more length, your partner needs more width, or your bedroom layout makes one footprint easier than the other.
California King vs King Mattress Dimensions
A standard king measures 76 inches wide by 80 inches long. A California king measures 72 inches wide by 84 inches long. The total sleep surface is almost identical (6,080 square inches for king versus 6,048 for Cal King) but the shape is different.
So, choose king if you want maximum shoulder-to-shoulder space. On the other hand, choose California king if you are tall, sleep lower on the mattress, or have a longer, narrower bedroom. Width is the king's advantage and length is the Cal King's whole personality.
| Spec | California King | King |
|---|---|---|
| Width | 72 in | 76 in |
| Length | 84 in | 80 in |
| Square inches | 6,048 | 6,080 |
| Best advantage | Extra legroom | Extra width |
| Best for | Tall sleepers, narrow primary bedrooms | Couples, pets, sleepers who spread out |
| BEDGEAR split-head option | Yes — Split Head Cal King | Yes — Split Head King |
California King vs Queen Mattress Dimensions
A California king is 12 inches wider and 4 inches longer than a queen. That is a major upgrade for couples, especially if one or both sleepers are tall. The queen works in more rooms, but the Cal King gives you a roomier sleep surface without going quite as wide as a standard king.
If you are moving from queen to Cal King, plan for new bedding and a larger frame. Queen sheets, protectors, and comforters will not stretch into a Cal King fit unless you enjoy fighting elastic at midnight. That is not recovery. That is cardio.
California King vs Full Mattress Dimensions
A full mattress is 54 inches wide by 75 inches long, which makes the California king dramatically larger in both directions. You gain 18 inches of width and 9 inches of length, so this is less of an upgrade and more of a full bedroom reallocation.
The full is a strong solo-sleeper size. The California king is a primary-bedroom size built for couples, tall sleepers, or people who need real sleep surface. If your room can handle it and your feet have been staging a quiet protest, Cal King solves the length problem fast.
California King vs Twin XL Mattress Dimensions
A twin XL is 39 inches wide by 80 inches long. It is narrow but long enough for many taller solo sleepers. A California king keeps the long-bed idea and expands it into a couples-ready footprint: 72 inches wide by 84 inches long.
Twin XL also matters because it is the building block of split king, not Split Head California King. If you want two fully separate mattresses, split king uses two Twin XLs. If you want one longer Cal King footprint with independent head movement, Split Head California King is the more relevant BEDGEAR configuration.
California King vs Split Head California King Mattress Dimensions
A standard California king is one mattress with one continuous head section. A Split Head California King keeps the same 72-by-84-inch footprint, but the upper portion is split so each side can adjust independently on a compatible adjustable base.
That makes Split Head California King especially useful for couples who want the extra length of a Cal King and different head positions at night. One person can sit up to read or reduce snoring pressure while the other stays flat. Romance, but with fewer remote-control arguments.
Room Size Guide for a California King Mattress Dimensions
The mattress is six feet by seven feet before you add a frame, nightstands, walking clearance, or the pile of decorative pillows nobody asked for. A California king needs a room with enough length for the mattress and enough side clearance to keep the bedroom usable.
The mattress fits, but the longer footprint can crowd furniture. Works best with a simple layout and smaller nightstands.
Better flow around the foot of the bed and more room for a real primary-bedroom setup.
Best FitRoom for nightstands, dresser, bench, and walking clearance without turning the bed into a wall-to-wall event.
If the room is short on length, a queen or standard king may fit the layout better depending on the wall and furniture setup.
If you are choosing between king and California king based on bedroom layout, measure the wall where the headboard sits and the clearance at the foot of the bed. Cal King needs those extra 4 inches lengthwise. In tight rooms, 4 inches has a way of becoming "why can't this drawer open?"
California King Size Mattress Shopping Guide
California king is a great fit for certain sleepers and a slightly awkward flex for others. However, it's not ideal for everyone. To help you narrow down your options, we cover some suitable shopper profiles for the king size mattress. Learn more below.
Tall Sleepers
This is the obvious one. The California king gives you 84 inches of length, which is 7 feet from top to bottom. If you are over 6'2", sleep stretched out, or hate feeling like your feet are flirting with the edge of the bed, Cal King is the standard size that finally makes sense.
The extra length also helps sleepers who use taller pillows or sleep lower on the mattress. Even if your exact height does not demand a Cal King, your sleep posture might. The question is not just how tall you are; it is how much of the mattress you actually use.
Couples in Longer Bedrooms
California king works well for couples whose room layout is longer than it is wide. You lose 4 inches of width compared with a standard king, but you gain 4 inches of length, which can help the bed fit the room better visually and functionally.
That said, couples who want maximum side-to-side space may still prefer a standard king. Cal King is not the "more space in every direction" choice. It is the "more length, slightly less width" choice, and that distinction should drive the decision.
Adjustable-Base Couples
Split Head California King is where this size gets especially BEDGEAR-specific. Instead of two fully separate mattresses, the mattress keeps the lower section connected while splitting the head section for independent adjustment on each side.
This is useful when one partner wants to elevate for reading, snoring, reflux, or comfort while the other wants to stay flat. For couples who want the long Cal King footprint but do not want a fully split bed, Split Head Cal King sits in the sweet spot. Now, adjustable bases can become complex in a hurry, so make sure you read our bed frame guide before you buy.
Hot Sleepers
More surface area can help, but construction matters more. BEDGEAR's M3 Night Ice® and M5 Night Ice® Cal King options are built for sleepers who want the longer footprint and stronger cooling support at the surface.
If you are choosing Cal King because you want more room to separate from a warm partner, cooling construction should be part of the decision too. A bigger heat trap is still a heat trap. The goal is space plus airflow, not just more mattress real estate.
Primary Bedrooms With Bigger Layouts
California king belongs in a primary bedroom with enough room to breathe. It can look balanced in long rooms where a standard king feels too wide, especially if the bed wall has more depth than width.
Measure before committing. Cal King bedding, protectors, frames, and adjustable bases are their own category. The size is worth it when it solves the room and body problem. It is less worth it when it creates a furniture problem you have to walk around every morning.
California King Bed Dimensions: What Fits and What Does Not
California king bedding is not interchangeable with standard king bedding. The width and length are different, so fitted sheets, protectors, and frames need to be specifically labeled California king. Comforters are more forgiving, but fitted bedding is not here for your optimism.
| Item | Cal King Dimensions | BEDGEAR Option | Notes |
|---|---|---|---|
| Fitted Sheet | 72 × 84 in | Ver-Tex Performance® Sheet Set | Use Cal King sheets; deep-pocket fit needed for 14" M5 models |
| Mattress Protector | 72 × 84 in | Dri-Tec Performance® Protector | Choose Cal King or Split Head Cal King based on mattress configuration |
| Split-Head Bedding | 72 × 84 in footprint | Split Head Sheets | Needed for independent head adjustment |
| Pillows | King pillows commonly 20 × 36 in | BEDGEAR Performance® Pillows | King pillows fill the wider Cal King surface best |
| Comforter / Duvet | King/Cal King comforters vary | — | Top bedding is more flexible than fitted sheets, but check overhang |
King Sheets Are Not California King Sheets.
A standard king fitted sheet is cut for 76 × 80 inches. A California king fitted sheet is cut for 72 × 84 inches. Same general vibe, wrong geometry. If you are moving to Cal King, plan on Cal King bedding from the start.
Frequently Asked Questions About Cali King Mattress Dimensions
The most common questions about California king mattress dimensions — answered.
