No Products in the Cart
A split California king mattress is made of two mattresses, each 36" x 84", placed side by side. The combined size comes out to be the same as that of a standard California king mattress (72" x 84"). It's very useful for taller couples who don't agree on how firm their mattress should be. Shop the best split California king mattresses at Turmerry! Made with GOLS-certified organic latex, they're affordable, compatible with adjustable bases, and built to last well over a decade. Every order comes with free shipping and a 120-night trial.
Note: In our split California king mattresses, only the latex layers inside the mattress cover are split in half. The cover itself isn't split.
Want help finding the best split California king mattress for you? Try our personalized mattress quiz.
A split California king is two mattresses, each 36 inches wide and 84 inches long, placed side by side in a California king bed frame. The main draw is that each half can be a different firmness, so partners with different sleep preferences don't have to meet in the middle.
It works especially well when one person runs hot at night, or when one person needs more support than the other. Each side is fully independent, and at 36 inches wide, each partner still has plenty of space to themselves, almost like sleeping on a twin XL.
The total size of a split Cal king bed is the same as a standard Cal king bed, so room size isn't a factor if you're already set up for one. The one thing to know going in is the seam down the center, which most couples stop noticing quickly, but it's there.
Here's a table to help you compare split California king mattresses with other mattress sizes:
| Mattress Size | Dimensions (W x L) | Best For |
|---|---|---|
| Split Cal King | 72 x 84 inches (36 x 84 inches on each side) |
Couples with different sleep preferences, couples on split Cal king adjustable bed frames |
| Twin | 38 x 75 inches | Toddlers, young kids, bunk beds, daybeds, small guest rooms |
| Twin XL | 38 x 80 inches | Tall teenagers, college dorms, single adults over 6 feet tall, split king setups |
| Full | 54 x 75 inches | Solo sleepers who want extra room to spread out, growing teens, guest rooms |
| Queen | 60 x 80 inches | Couples, solo sleepers who like extra space, standard master bedrooms (most popular size) |
| Split Queen | 60 x 80 inches (30 x 80 inches on each side) |
Couples with different sleep preferences, couples on split queen adjustable bed frames |
| King | 76 x 80 inches | Couples who want maximum personal space, families who co-sleep with kids/pets |
| Split King | 76 x 80 inches (38 x 80 inches on each side) |
Couples with different sleep preferences, couples on split king adjustable bed frames |
| California King | 72 x 84 inches | Tall couples (over 6 feet) who prioritize extra legroom |
You should buy a split California king mattress if:
A split king mattress is 4 inches wider (and 4 inches shorter) than the split Cal king, so if you don't need the extra length and need more width instead, go for a split king. If you and your partner agree on firmness, a standard California king mattress is also a simpler, more affordable route. If you want the same split setup in a size that fits a smaller room, a split queen mattress gives each person 30 inches of width without needing as much floor space.
Turmerry mattresses are made with high-quality materials, including certified organic latex, cotton, wool, and pocketed coils. With benefits ranging from responsive support and contouring pressure relief to breathable cooling, they're some of the best split California king mattresses you can find today.
Note: In our split Cal king mattresses, only the latex layers inside the mattress cover are split in half. The cover itself isn't split.
Latex responds to your movements instantly, pushing back as you shift positions. Turmerry mattresses are built with 7-zone support, firmer under heavier areas like the hips and lower back, softer under lighter areas like the shoulders and thighs. Your spine stays aligned through the night without any single pressure point taking too much load.
Latex contours closely to the shape of your body, distributing weight evenly across the surface. This reduces pressure buildup at the shoulders and hips, which is especially useful for side sleepers who concentrate weight through those areas for hours at a time.
Latex has an open-cell structure that lets air move through it, and our perforated layers improve this further. The wool layer wicks moisture and buffers heat, keeping you warmer in winter and cooler in summer without synthetic cooling additives.
With a split California king, motion isolation is built into the design. Each half is a separate mattress, so movement on one side doesn't reach the other at all. The edges hold up well too, because Dunlop latex is dense enough to stay firm at the borders, so each person gets the full 36 inches of their side without too much compression at the edges.
Dunlop latex doesn't sag the way memory foam and polyfoam do. A well-maintained Turmerry mattress lasts well over a decade, making it a better long-term investment than cheaper options that need replacing every few years.
Latex is naturally resistant to dust mites, mold, and mildew. Combined with the organic cotton and wool cover, Turmerry's split California king mattresses are a good fit for anyone with allergies or chemical sensitivities.
Turmerry mattresses carry GOLS and OEKO-TEX certifications for the organic latex, GOTS for the organic cotton, and LGA for overall quality. Every certification is third-party verified, confirming the materials are free from harmful substances and built to last.
Every split California king mattress ships free across the US and comes with a 120-night sleep trial. That's enough time to know whether the mattress is genuinely working for you or not.
A split California king takes up the same floor space as a standard California king, so you'll need at least 12 x 12 feet to move around comfortably. If you're fitting other furniture into the room alongside it, plan for more than that minimum.
Split California king mattresses are priced similarly to standard California kings, too, though the split configuration can add a small premium. Basic options range from around $800 to $2,000. Premium latex and hybrid options start around $1,600 and can go up to $2,800 or more. Turmerry's organic latex split California king mattresses start at $1,999, which puts them at the lower end of the premium range for materials that last a lot longer than memory foam.
Standard California king sheets will fit the bed just fine. If each partner prefers fully separate bedding on their own side, you'll need two sets of split California king sheets, one per half.
These are the four most popular split California king mattress types you'll find on the market:
Latex mattresses are made from natural or synthetic rubber. Natural Dunlop latex (what we use in our own mattresses) is the most durable of the four. It's dense, responsive, and built to last for well over a decade. It also sleeps cooler than memory foam and contours closely to relieve pressure. Plus, it's naturally hypoallergenic. The upfront cost is higher than the other materials, but the lifespan makes latex the best long-term value by a wide margin.
Memory foam molds to the body and relieves pressure well, which is why it's popular with side sleepers. The trade-offs are impactful for many, though. It retains heat, makes changing positions feel sluggish, and breaks down faster than latex. Memory foam is workable on a short-term budget, but not a great long-term investment.
Hybrid mattresses combine a pocketed coil base with a latex or memory foam comfort layer on top. The coils improve airflow and add bounce, while the comfort layer takes care of cushioning and pressure relief. A good middle ground for sleepers who want contouring without giving up edge support or breathability. More durable than memory foam, though heavier and pricier.
Innerspring mattresses use interconnected coils (like Bonnell or offset), with thin comfort layers on top. They're the most affordable of the four and the most traditional in construction. The downsides include minimal pressure relief, poor motion isolation, and a shorter lifespan than latex and hybrid mattresses.
Consider all of these factors before finalizing your purchase:
With a split California king, each side is set to its own firmness level, so you only need to worry about what works for you. Side sleepers need a softer feel to cushion the shoulders and hips. Back sleepers do best on medium-firm. Stomach sleepers need something firm enough to keep the hips from sinking. Body weight plays a role too. Lighter sleepers need softer cushioning, while heavier sleepers need firmer support.
Around 10 to 12 inches works well for most couples on a split California king. Heavier sleepers should lean toward the thicker end for adequate support. Thickness also affects how easy it is to get in and out of bed, which is worth keeping in mind for older sleepers with mobility issues.
Natural latex lasts 15 to 20 years without sagging. Memory foam contours closely but traps heat and breaks down faster. Hybrids combine pocketed coils with a memory foam or latex comfort layer for better airflow and edge support than all-foam options. Innerspring is the most affordable but wears out quickest and offers the least pressure relief.
If overheating is a concern, go for naturally breathable materials like latex and cotton. A split California king means two people generating heat across a wide surface, so prioritize good temp regulation. Innerspring and hybrid mattresses also sleep cool thanks to the coil layer. Wool helps further by pulling moisture away through the night. Memory foam is the worst option for hot sleepers unless it has cooling gel built in.
Split California king mattresses are priced similarly to regular Cal kings, with good, high-quality options starting around $1,200 to $2,000. Factor in a compatible bed frame and bedding on top of the mattress cost. If each partner wants independent bedding, budget for two sets of split California king sheets rather than standard California king sheets.
A split California king handles motion isolation better than any standard mattress since each half is completely separate. Within each side, latex and memory foam absorb movement well. Pocketed coils in a hybrid help too. Interconnected innerspring coils transfer motion across the surface, so avoid them if motion isolation is important to you.
Strong edge support lets both partners use the full 36 inches of their side without the borders giving way. Latex holds its shape well at the edges due to its density. Hybrids with reinforced perimeter coils perform even better here. Memory foam compresses at the edges under body weight, so keep that in mind if you tend to sleep close to the side of the bed.
A split California king sees two sleepers every night, so the materials need to be durable. Latex lasts 15 to 20 years, recovering quickly from pressure each time. Quality hybrids last around 8 to 10 years. Memory foam and innerspring mattresses tend to start sagging within 5 to 7 years. If you're considering an all-foam option, check the base foam density since low-density foam breaks down faster under regular use.
A split California king is a big purchase, so make full use of the trial period. Look for at least 60 to 90 nights. Ten years is a reasonable warranty baseline for latex and hybrid mattresses. Read the fine print carefully since coverage varies quite a bit between brands.
Look for reviewers with a similar body type and sleep position to yours. A review from a 130-lb side sleeper won't tell you much if you're a 220-lb back sleeper. Reviews from people who've had the mattress for two or more years are the most useful, since that's when durability issues surface in lower-quality models.
The right bedding makes a real difference in how your split California king mattress feels night to night. Here's what we recommend:
A sturdy base keeps both halves supported evenly. Platform frames work best for latex, memory foam, and hybrid mattresses. Make sure the slats are no more than 3 inches apart so neither half dips between them. If you're going for an adjustable bed base, check with the manufacturer to see whether your mattress is compatible.
A topper lets you adjust the feel of one or both sides without needing to replace the entire mattress. Two to three inches is enough to change the feel of the bed.
A mattress pad adds a thin layer of cushioning and protects the surface from daily wear. It won't change the feel of the mattress much, but it keeps things cleaner over time.
Two people on the same bed means twice the sweat, body oils, and spill risk. A waterproof protector keeps all of that out of the mattress and helps maintain your warranty coverage as well.
Standard California king sheets easily fit the full surface of a split Cal king. If each partner wants independent bedding, two sets of split California king sheets work instead, one per half. Cotton is a reliable choice that gets softer with each wash.
If you and your partner sleep at different temperatures, a wool comforter is a natural middle ground. It regulates heat without overheating either side. Some couples prefer two separate comforters so each person has full control over their own warmth.
A duvet cover protects your comforter and makes upkeep easier. Toss it in the wash regularly instead of cleaning the comforter itself each time.
