California King Mattress Dimensions
The California King mattress, often referred to as the “Cal King,” measures 72 inches wide by 84 inches long. This makes it 4 inches narrower but 4 inches longer than a standard King mattress, which is 76 inches wide and 80 inches long.
Why Choose a California King Mattress?
There are several reasons why someone might choose a California King mattress over other sizes. People who are taller than average often find the extra length to be a significant benefit, providing more legroom and enhancing their overall comfort.
Enhanced Comfort for Taller Individuals
One of the most compelling reasons to opt for a California King is its design catering specifically to taller individuals. While a standard King mattress offers an ample width of 76 inches, it falls short in length, measuring only 80 inches. This can be a constraint for people who are 6 feet or taller, leading to discomfort as their feet hang off the edge of the bed. The additional 4 inches in length provided by a California King mattress ensures that even the tallest of individuals can sleep comfortably.
Generous Sleeping Space
Though a California King is slightly narrower than a standard King, it still offers an expansive sleeping surface. With a width of 72 inches, it provides plenty of room for couples to sleep comfortably without disturbing each other. The extra length also allows for a more spacious feel, accommodating not just couples but also pets or children who may join the bed.
Our Top 5 Mattress Picks
Updated September 2026EGOHOME 8-Inch Green Tea Memory Foam Mattress, Full, Medium Firm
Best for most bedrooms. A medium-firm green tea memory foam mattress with a cooling gel layer, delivered rolled in a box.
- Full size, 8 in
- Medium firm
- Cooling green tea gel
- CertiPUR-US, fiberglass free
OhGeni Queen Air Mattress with Built-in Pump, 18-Inch Raised
Best for guests and camping. Inflates in about three minutes with the built-in pump and sits 18 inches off the floor, so it feels like a real bed.
- Queen, 18 in raised
- Built-in pump
- 800 lb capacity
- Waterproof PVC
Novilla 6-Inch Gel Memory Foam Mattress, Twin
Best budget twin. A slim gel memory foam twin that suits kids' rooms, bunk beds and trundles where a thick mattress won't fit.
- Twin, 6 in
- Gel memory foam
- Cooling
- CertiPUR-US
Zinus 8-Inch Green Tea Memory Foam Mattress, Twin
Best-known brand. Zinus's long-running green tea foam design in twin size, with both CertiPUR-US and OEKO-TEX certified materials.
- Twin, 8 in
- Green tea memory foam
- CertiPUR-US & OEKO-TEX
GAESTE 8-Inch Cooling Gel Memory Foam Mattress, Full, Medium Feel
Best for hot sleepers. Cooling gel memory foam with a medium feel, plus a machine-washable, anti-slip cover you can actually clean.
- Full size, 8 in
- Medium feel
- Cooling gel foam
- Washable cover
- Fiberglass free
Proportionate Room Aesthetics
The elongated dimensions of a California King can make it a better fit for large, rectangular rooms. It balances the proportions of the space, making the bedroom feel well-planned and aesthetically pleasing. The mattress’s sleek and elongated look can add a touch of elegance to your sleeping space.
Materials and Types
Once you’ve decided that a California King is the right mattress size for you, the next consideration is the type of materials and overall construction. There are several popular types of mattresses on the market, each offering different benefits.
Memory Foam
Memory foam mattresses are known for their ability to conform to your body’s shape. They offer excellent support and pressure relief. These mattresses are particularly good for those with joint pain or specific pressure points.
Innerspring
Innerspring mattresses are the more traditional type, featuring coils for support. They are usually less expensive than high-quality memory foam mattresses and offer strong support and durability. Most modern innerspring mattresses also incorporate a top layer of foam or other soft materials to enhance comfort.
Hybrid
Hybrid mattresses combine the best features of both memory foam and innerspring mattresses. They offer the contouring and pressure relief of memory foam, along with the strong support of innerspring coils. This makes them a versatile option for various sleepers.
Latex
Latex mattresses are known for their durability and comfort. They provide a unique blend of support and pressure relief, and they are often more environmentally friendly compared to other types. Latex is naturally hypoallergenic and resistant to dust mites, mold, and mildew, making it a great choice for those with allergies.
Bedroom Size Considerations
While a California King mattress offers many benefits, it’s essential to consider the size of your bedroom before making a purchase. Ideally, you should have ample space around the mattress for other furniture and to move around comfortably.
Room Dimensions
For a California King mattress, a bedroom that’s at least 12 by 12 feet is recommended. This allows for plenty of room to accommodate the bed frame and other bedroom furniture like nightstands, dressers, and chairs. Having adequate space around your mattress ensures that your bedroom remains functional and aesthetically pleasing.
Furniture Layout
Consider the layout of your room when deciding on a California King mattress. Measure the dimensions of your room and create a floor plan. This helps ensure that adding such a large bed won’t make the room feel cramped or cluttered. It’s also important to consider the placement of doors, windows, and closets to make sure they are easily accessible.
Moving and Setup
Transporting and setting up a California King mattress can be challenging due to its large size. Make sure that your home’s hallways, doors, and staircases can accommodate the mattress. You may need to engage professional movers to help with the setup to avoid damaging your new mattress or your home.
Cost and Investment
Buying a California King mattress is a significant financial investment. Prices can vary widely based on the type of mattress, materials used, and brand. Here’s a breakdown of what you can generally expect to spend:
Budget Options
Budget California King mattresses generally start around $300 to $500. These mattresses may lack some of the advanced features and durability found in pricier options, but they still provide the basic comfort and support required for a good night’s sleep. They can be an excellent choice for guest rooms or temporary sleeping arrangements.
Mid-range Options
Mid-range California King mattresses typically cost between $800 and $1,500. These mattresses often offer better materials and construction, providing enhanced comfort and longevity. They may include features like gel-infused memory foam for improved temperature regulation or zoned support for targeted pressure relief.
Premium Options
Premium California King mattresses can cost anywhere from $1,500 to $3,000 or more. These high-end mattresses are often made from luxury materials like organic latex, or they may feature advanced technologies like adjustable firmness levels or built-in cooling systems to enhance sleep quality. While the initial investment is higher, these mattresses tend to offer the best long-term value due to their superior comfort and durability.
Accessories and Bedding
Once you’ve selected your California King mattress, you’ll need appropriate accessories and bedding to complement it. Though these items can often be found in standard sizes, it’s important to seek out those specifically designed for a California King for the best fit and comfort.
Bedding Sets
Bedding for a California King includes sheets, comforters, and duvet covers that are specially sized to fit the mattress dimensions. Ensure that the sheets have deep pockets to fit the height of your mattress, especially if you have a pillow top or a mattress topper.
Bed Frames and Foundations
A sturdy bed frame or foundation is essential to support your California King mattress. Many styles are available, from sleek metal frames to opulent upholstered designs. When choosing a bed frame, consider the aesthetic of your room and the level of support required by your mattress type.
Pillows and Accessories
Quality pillows complement your mattress by offering proper head and neck support. Memory foam and latex pillows are popular choices, providing excellent support and aligning your spine for better sleep. Additional accessories like mattress protectors and toppers can further enhance your sleep environment by adding an extra layer of comfort and extending the life of your mattress.
Care and Maintenance
Proper care and maintenance can significantly extend the life of your California King mattress. Simple practices can ensure that your mattress stays clean, comfortable, and supportive for years to come.
Regular Cleaning
Cleaning your mattress regularly is crucial for maintaining hygiene and comfort. Use a vacuum cleaner with an upholstery attachment to remove dust and debris from the surface. Spot-clean any stains using a mild detergent and water. Consider using a mattress protector to guard against spills and stains.
Rotating the Mattress
Rotate your mattress 180 degrees every three to six months to ensure even wear. This helps to prevent sagging and prolongs the life of the mattress. If your mattress is flippable, flip it along with rotating. However, most modern mattresses are designed to be used on one side only.
Using Proper Support
Ensure that your bed frame or foundation provides adequate support for your mattress. Slatted bed frames should have slats no more than 3 inches apart to prevent sagging. Improper support can lead to premature deterioration of the mattress materials.
Customization and Comfort
Many manufacturers offer customization options for California King mattresses, allowing you to tailor the mattress to your personal comfort preferences. This can range from choosing the firmness level to adding features like temperature control or adjustable bases.
Adjustable Bases
Adjustable bases allow you to change the position of the mattress at the touch of a button, raising or lowering the head and foot sections. This is particularly beneficial for individuals with specific medical conditions like acid reflux, sleep apnea, or chronic back pain. It also adds an extra level of comfort for watching TV or reading in bed.
Temperature Regulation
Some California King mattresses come with built-in temperature regulation features. This can range from breathable materials that promote air circulation to advanced technologies like gel-infused memory foam or even integrated cooling systems. These features can help you maintain a consistent and comfortable sleeping temperature, improving overall sleep quality.
Split California King
A Split California King mattress consists of two separate mattresses placed side by side, each measuring 36 inches wide by 84 inches long. This setup allows couples to customize their side of the bed according to their individual preferences, whether that’s firmness level or adjustable settings. It’s a perfect option for those who share a bed but have diverse sleep needs.
Environmental Considerations
With growing awareness around environmental sustainability
