A king size bed is wider than a queen size bed. While a queen bed is about 60 inches wide, a king size bed is 76 inches wide. Both are 80 inches in length.
A California King bed is longer but less wide compared to a regular King size bed. The dimensions of a California King bed are 84" length and 72" wide.
|Width ||193 cm (76")
|Length ||203 cm (80")
|Cost ||Since a king size bed is larger, it is more expensive and mattresses in this size may also cost more compared to queen beds.
||It turns out to be a bit expensive.
|Surface area ||6,080 sq. in.
||4,800 sq. in.
|Usage ||King size beds are usually found in the master bedroom.
||Queen beds are generally put in the guest room or smaller master bedrooms.
|Frame ||The frame is required to have a centre leg support besides the normal rectangular structure.
||The frame for a queen bed is required to have a center leg support besides the normal rectangular structure.
|Advantage ||The size of a king size bed allows for greater comfort and space, especially for people who are bigger in size.
||It is better suited for two people or for somebody who is tall.
|Size ||76" wide, 80" long
||Queen bed dimensions: 60" wide, 80" long
edit Video explaining the differences
This video explains the different sizes of beds and mattresses:
Prices varies by the distributor, the type of mattress (spring, memory foam etc) used, accessories etc. Current prices for a few products are available on Amazon.com: