King Size Bed Width in Feet
A king size bed takes up a lot of space, so knowing the width in feet helps with room planning, frame shopping, and delivery access. This guide is for couples, families upgrading from a queen, and anyone checking whether a king will fit the bedroom properly. A common misunderstanding is that a standard king is exactly 6 feet wide. In standard Canadian sizing, a king mattress is 76 inches wide, which is 6 feet 4 inches wide not 6 feet exactly.
How wide is a king size bed in feet?
A standard king mattress is 76 inches wide. That converts to 6 feet 4 inches (6.33 ft). The standard king length is 80 inches, which is 6 feet 8 inches.
Simple conversion:
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Width: 76" = 6'4" (6.33 ft)
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Length: 80" = 6'8"
What are the full king size mattress dimensions?
For most Canadian shoppers, the standard king mattress size is:
| Measurement | Inches | Feet | Centimetres (approx.) |
|---|---|---|---|
| Width | 76" | 6'4" | 193 cm |
| Length | 80" | 6'8" | 203–203.5 cm |
Small rounding differences in centimetres can happen depending on how a retailer rounds the metric conversion. Brands can also vary slightly in finished dimensions, so always check the exact product listing before you buy.
How much wider is a king than a queen?
A queen mattress is 60 inches wide, while a king is 76 inches wide. That means a king gives you 16 extra inches of width compared with a queen—about 1 foot 4 inches more side-to-side space.
That extra width is the main reason many couples upgrade: it gives each sleeper more personal space.
Is a king size bed the same as a California king?
No. A standard king and a California king are different.
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Standard King: 76" × 80"
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California King: 72" × 84"
A standard king is 4 inches wider, while a California king is 4 inches longer. If you’re focused on width, the standard king is the wider option.
How much room should you plan around a king bed?
A king may fit on paper but still feel too large once you add side tables, dressers, and walking space. Layout matters as much as mattress dimensions.
Before buying, measure your delivery path:
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Doorway width
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Hallway turns and tight corners
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Stair landings
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Elevator depth (if applicable)
Also measure the bedroom:
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Room width and length
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Space for side tables
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Closet and dresser clearance
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Walking clearance around the bed
Does the frame change the actual size you need?
Yes. A king mattress is 76 inches wide, but the assembled bed frame is often wider than that once you add side rails, a headboard, or an upholstered surround. Always check the frame’s overall width and length separately from the mattress size.
If you use a platform bed, confirm slat spacing and support requirements. Some king platform beds use slats and don’t need a box spring, while other setups use a foundation depending on the frame design.
FAQ
Is a king size bed 6 feet wide?
No. A standard king mattress is 6 feet 4 inches wide (76").
What is the width of a king size bed in centimetres?
The standard width is about 193 cm.
Is a king size bed too big for a small room?
It can be. Kings reduce walking space quickly once you add furniture and clearance.
Is a king wider than a California king?
Yes. A standard king is 76" wide, while a California king is 72" wide.
Related reading
Reality Check
Common mistakes include rounding a king down to 6 feet wide, checking only mattress size instead of the full frame footprint, and forgetting that bedroom layout matters as much as the mattress itself. The usual issues are practical: the frame can take up more space than expected, the room can lose too much walking clearance, or delivery can be harder than planned.
A standard king is usually best for couples who want more side-to-side room and for larger primary bedrooms. It’s a weaker fit for smaller rooms or tight delivery paths. If you mainly need extra legroom rather than extra width, a California king (longer, narrower) may fit your situation better.
