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A split California king consists of two separate mattresses — each 36 inches wide and 84 inches long — placed side by side to create a 72x84-inch sleep surface. It is the longest standard mattress configuration available and is primarily chosen by couples who want individualized sleep settings on an adjustable base.
Split California King Dimensions
- Each mattress: 36" W x 84" L
- Combined width: 72 inches (same as standard California king)
- Combined length: 84 inches (6 inches longer than standard king)
- Minimum room size: 12' x 12' recommended for adequate walkway space
Who Is a Split California King For?
The split California king is purpose-built for couples with different sleep preferences who use an adjustable base. Each mattress sits on its own adjustable base section, allowing one partner to elevate their head while the other sleeps flat. This configuration solves the most common couples' sleep conflict: one person wants to read or watch TV in bed while the other sleeps.
Tall sleepers (6'4" and above) also benefit from the extra 6 inches of length compared to a standard king (76x80"). A California king at 72x84" provides more legroom for tall individuals, though it trades 4 inches of width.
Split California King vs Standard California King
| Feature | Split Cal King | Standard Cal King |
|---|---|---|
| Dimensions | Two 36"x84" | One 72"x84" |
| Adjustable base | Yes — independent | Split base required |
| Motion isolation | Excellent — gap divides | Depends on mattress |
| Bedding availability | Limited, specialty | Wide availability |
| Price | Higher (two mattresses) | Lower (one unit) |
| Partner disturbance | Minimal | Varies by mattress |
Best Mattresses for Split California King
Not all brands offer split California king sizing. Here are the most reliable options:
Saatva Solaire
The Saatva Solaire is purpose-designed for split adjustable configurations. It offers 50 firmness settings per side via remote control, allowing each sleeper to dial in their ideal firmness. At $2,499 per side ($4,998 for the pair), it is premium but uniquely customizable. White glove delivery included.
Tempur-Pedic TEMPUR-Ergo
Tempur-Pedic offers split California king sizing across most of its lineup. The TEMPUR-Ergo is specifically designed to work with Tempur-Pedic's smart adjustable base. Each side conforms independently to body shape. Pricing starts at $2,199 per side.
Purple Restore Premier Hybrid
Purple offers split California king in the Restore Premier Hybrid. The Hyper-Elastic Polymer Grid provides excellent motion isolation and temperature neutrality. Compatible with most split adjustable bases. $2,299 per side.
Puffy Lux Hybrid
Puffy offers split California king sizing with a 101-night trial and lifetime warranty. The Lux Hybrid combines foam comfort layers with individually wrapped coils for motion isolation. Compatible with adjustable bases. Starting at $1,699 per side.
Adjustable Bases for Split California King
A split California king requires either two separate adjustable bases or one split-head king adjustable base that accommodates the 72" combined width. Key brands:
- Saatva Adjustable Base Plus: Individual remote, massage, zero-gravity. $1,499 per side.
- Tempur-Pedic Ergo Smart Base: App control, snore detection, sleep tracking. $2,499 per side.
- Beautyrest BlackICE: Wireless remote, USB charging, under-bed lighting. $799–$1,299 per side.
- Nectar Adjustable Frame: Budget-friendly, wireless remote, zero-gravity preset. $599 per side.
Bedding for Split California King
Split California king bedding is limited compared to standard sizes. Options:
- Split top sheets: Each side has a separate top sheet — ideal for couples with different temperature preferences.
- Single fitted sheet: Some brands make unified fitted sheets for the 72x84" footprint.
- Individual duvets: Scandinavian method — each partner uses their own duvet. Eliminates sheet-stealing entirely.
For fitted sheets, search specifically for "split California king fitted sheet" — brands like Mellanni, Pacific Coast, and Cariloha offer them. Expect to pay $20–$40 more than standard California king sheets.
Frequently Asked Questions
Frequently asked questions about this size
Our default pick at this size
Saatva Classic — Cal King $2,199 (was $2,599, −$400)
The Saatva Classic is the most-ordered luxury hybrid on the US market and ships in every standard size. Zoned lumbar support, 365-night home trial, lifetime warranty, free white-glove delivery + old-mattress removal included.
What are the dimensions of a California king?
California king is 72" × 84". 4" narrower than standard king but 4" longer. Originally designed for tall Hollywood sleepers in the 1960s, now standard across North America.
Cal-king vs king: which should you buy?
Go cal-king if: sleepers are 6'2"+, the bedroom is long but narrow, or you want extra foot space for pets. Go standard king if: couples want side-to-side space, sleepers are under 6'0", or the room is wider than it is long.
Is cal-king bedding hard to find?
Less than it used to be — most mainstream brands now carry cal-king sheets, toppers, and protectors, but the selection is 50–70% smaller than standard king. Premium brands (Saatva, PlushBeds) carry full cal-king lines.
Is a split California king the same size as a regular California king?
Yes — the combined dimensions are identical at 72 inches wide by 84 inches long. The difference is that the split version consists of two separate 36x84 inch mattresses placed side by side rather than a single unit.
Do you need a special adjustable base for a split California king?
Yes. A split California king requires either two separate twin XL adjustable bases or a California king-specific split adjustable base. Most couples use two individual adjustable bases placed side by side.
What is the gap between the two mattresses in a split California king?
The gap is typically 0.5 to 1 inch when the two bases are pushed together. Many couples use a split king mattress connector or bridge pad to fill the gap and create a seamless sleeping surface.
Is a split California king good for back pain?
Yes — particularly if paired with an adjustable base that allows zero-gravity positioning. This reduces spinal pressure. Each partner can also choose their ideal firmness level independently, which is beneficial when partners have different back pain needs.
Frequently asked questions
What should I know about california king size?
California king is 72" x 84" — 4 inches narrower and 4 inches longer than a standard king. The extra length suits sleepers over 6 feet; the narrower width keeps it from dominating a rectangular bedroom. Bedding is not interchangeable with standard king.
What should I know about california king measurements?
California king is 72" x 84" — 4 inches narrower and 4 inches longer than a standard king. The extra length suits sleepers over 6 feet; the narrower width keeps it from dominating a rectangular bedroom. Bedding is not interchangeable with standard king.
What is the difference between california king size and king?
A standard king measures 76" x 80" and a California (cal) king measures 72" x 84". King is 4 inches wider, cal king is 4 inches longer. Choose cal king if sleepers are taller than 6 feet or the bedroom is longer than wide; choose king for couples who need extra shoulder space or share with kids/pets.
What should I know about split california king mattress?
A split California king is two 36" x 84" Twin XL Long mattresses placed on a cal-king adjustable base. Both halves articulate independently but look like a single 72" x 84" cal king. Bedding is custom sized — regular Twin XL sheets will not fit the 84" length. Niche product, usually special-order.
What should I know about split cal king?
A split California king is two 36" x 84" Twin XL Long mattresses placed on a cal-king adjustable base. Both halves articulate independently but look like a single 72" x 84" cal king. Bedding is custom sized — regular Twin XL sheets will not fit the 84" length. Niche product, usually special-order.