California King mattress dimensions and shopping guide
A California King, often called Cal King, is approximately 72 inches wide and 84 inches long. It is four inches longer and four inches narrower than a standard King. Consider it when extra length matters more than the widest standard sleeping surface.
Plan the full Cal King sleep setup
Check your frame, foundation, mattress protector and fitted sheets for California King sizing. Standard King bedding and support components are not automatically interchangeable with Cal King. For an adjustable bed, confirm whether you need one mattress or a specifically listed split configuration.
Compare base configurations · Find sheets by mattress size
Compare nearby mattress sizes
See the complete mattress size chart.
Choose your size before comparing prices
Open a mattress above and select California King to see its current price and available options. Product-card starting prices may represent a smaller size. Finished dimensions, height and availability vary by model.
Can two Twin XL mattresses make a California King?
No. Two Twin XL mattresses form the usual standard Split King footprint, about 76 by 80 inches. Split California King uses different component dimensions. Order only the configuration explicitly specified for your frame and base.
Shop online or compare selected models at our Magnolia, Huntsville, Montgomery and New Caney showrooms. Call ahead for a specific display. Read delivery and setup options and the written comfort-exchange terms before ordering.
