by Our Pick
Saatva Lineal Split King. From $2,790
365-night trial · Lifetime warranty
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A split king bed frame is designed to hold two Twin XL mattresses (each 38" x 80") side by side, forming a full king-size sleep surface (76" x 80" combined). It is the go-to setup for couples where each partner wants different firmness, each wants separate adjustable-bed control, or where one partner snores / needs head elevation.
Why Choose a Split King Setup
- Different firmness per partner. Each person gets the exact mattress feel they prefer.
- Independent adjustable control. One partner can raise the head, the other stay flat.
- Reduced motion transfer. Physical separation between mattresses = zero motion transfer.
- Easier moving / assembly. Two twin-XLs fit up staircases that a full king cannot.
Standard King vs Split King Dimensions
| Size | Width | Length | Construction |
|---|---|---|---|
| Standard (Eastern) King | 76" | 80" | One piece |
| Split King | 76" | 80" | Two 38" Twin XL mattresses |
| California King | 72" | 84" | One piece |
Split King Frame Types
Split King Adjustable Base
Two independent motorized bases side-by-side. Each partner adjusts independently. Best setup for couples with different preferences or medical needs. Our pick: Saatva Lineal Split King.
Split King Platform Frame
A traditional-style frame designed for two Twin XL mattresses. Less common than adjustable versions — most split king buyers choose adjustable bases.
Our Pick: Saatva Lineal Split King Adjustable Base
Two independent Twin XL adjustable bases with programmable head/foot elevation, wireless remotes, and lumbar massage. Best combined with two Saatva Classic mattresses in different firmness levels.
Our Pick
Saatva Lineal Split King. From $2,790
365-night trial · Lifetime warranty
Bedding for Split King
- Fitted sheets: Two Twin XL fitted sheets (one per half)
- Top sheet / duvet: King-size top sheet covers both halves
- Pillows: 2 King (20"x36") for aesthetic, or 2 Queen for proportion
- Mattress protectors: Two Twin XL protectors
FAQ
What size mattress goes on a split king frame?
Two Twin XL mattresses (each 38" x 80"). Combined: 76" x 80".
Is a split king cheaper than a king?
Often similar or slightly more expensive due to two mattresses instead of one. The split adjustable base ranges $2,790+.
Can two people sleep comfortably on split king?
Yes — 38" per person is more than a standard king (38" per person on 76"). And zero motion transfer.
Related reading: Split King Adjustable Bed | Best King Bed Frame | Best Adjustable Bed for Apnea | Alaskan King Mattress
Bed frame buying checklist
- Confirm mattress dimensions fit the frame interior (Queen = 60 × 80 in, King = 76 × 80 in).
- Check slat spacing — maximum 3 inches for memory foam warranty coverage.
- Verify center support leg for queens and larger, especially if combined sleeper weight exceeds 400 pounds.
- Measure doorway and hallway clearance before ordering — boxed frames often ship 80 inches long.
- Allow 24 inches of clearance on each side of the frame for comfortable bedside movement and nightstands.
- Plan for 12-18 inches under-bed clearance if you use storage bins.
Bed frame materials compared
- Solid wood — strongest, heaviest, longest lifespan (15-30 years). Oak, maple, and walnut are top picks.
- Metal (steel) — strong, often noisy (squeaks), 10-20 year lifespan. Powder-coated finishes resist chipping.
- Upholstered — softer aesthetic, limited lifespan (5-10 years), harder to clean. Good for bedrooms where the frame is visual focus.
- Engineered wood / particleboard — budget option. Expect 3-7 year lifespan before joints loosen.