How Big Is a King Bed?

A standard king mattress measures 76 inches wide by 80 inches long (6 feet 4 inches by 6 feet 8 inches). It’s the largest standard mattress size available, offering ample room for couples, co-sleeping families, or anyone who enjoys extra space. Below is a detailed infographic at king bed dimensions and common variations.

King Size bed

Standard King Bed Frame Dimensions

Component Width Length Notes
Mattress 76 inches (6 ft 4 in) 80 inches (6 ft 8 in) Standard king mattress
Simple Frame 78–82 inches 82–85 inches Platform or metal rail beds, low profile
Framed with Headboard 82+ inches 85+ inches Adds bulk depending on design, especially at the headboard
With Storage Varies Varies Can increase total size

King Bed Variants

Mattress Type Width Length Description
Standard King 76" 80" Most common, fits most master bedrooms
California King 72" 84" Narrower and longer — better for taller sleepers
Split King 2 x 38" 80" Two twin XL mattresses side by side — great for adjustability

Measurement Tip

Before buying a king bed:

  • Measure your room and check doorway and stair clearance.
  • Account for added headboard/footboard sizes.
  • Leave at least 2 feet of space around the bed for movement.

The recommended minimum room size for a king bed is 12 feet by 12 feet, ensuring enough space for furniture and comfortable circulation.

The post How Big Is a King Bed? appeared first on Homedit.



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