What Is the Width of a Super King Size Bed?

A super king size bed in the UK measures 180cm wide, which works out at 6ft across. The standard length is 200cm, or 6ft 6in, so the full mattress footprint is 180cm x 200cm. That makes it the widest bed size sold as standard in British homes, sitting 30cm wider than a king and 45cm wider than a double.

Those extra centimetres change how a bedroom functions rather than simply how it looks. Two adults sleeping on a super king each have 90cm of personal space, which is the same width a single sleeper gets on a standard single mattress. That is the practical reason so many couples move up to this size once they have the floor area to support it.

Super King Width in Context

Numbers on their own are hard to picture, so it helps to compare the standard UK bed widths side by side. A single is 90cm, a small double is 120cm, a standard double is 135cm, a king is 150cm and a super king is 180cm. The jump from king to super king is the largest single step in the range.

The length matters too. A king and a super king share the same 200cm length, so if you are already sleeping on a king, moving up to a super king only affects the width of your room layout, not the depth. That is useful to know if your bed sits against a shorter wall with limited space at the foot.

Frame dimensions are a separate consideration. The 180cm figure refers to the mattress. Depending on the design of the frame, the external width may be anywhere from 185cm to 200cm. Upholstered frames with deep padded side rails and wooden frames with substantial posts add the most. Slim metal frames add the least. Always take the external measurement from the product specification rather than assuming the mattress size is the footprint.

How Much Floor Space You Actually Need

A super king needs more than its own footprint to work properly. As a general rule, allow 60cm to 75cm of clear walking space on any side you need to access. For a bed placed centrally with access on both sides and at the foot, that means a room of roughly 3.4m x 3.4m as a comfortable minimum.

Smaller rooms can still take a super king if you accept a compromise. Pushing one long side against a wall frees up space, though it means one sleeper has to climb over the other. In loft conversions and boxy new build bedrooms, this arrangement is common and works well enough when the bed is used mainly for sleeping rather than lounging.

Door swings, radiators and window sills are the details that catch people out. A door that opens inwards needs its full arc kept clear. Wall mounted radiators reduce usable width at skirting level. If a chimney breast projects into the room, measure the narrowest point rather than the widest. Marking the 180cm x 200cm footprint on the floor with masking tape before ordering is a quick way to test whether the layout genuinely works.

Bedding and Mattress Considerations

Super king bedding is a distinct size, so existing king linen will not stretch to fit. Fitted sheets need to be cut for 180cm x 200cm, and duvets are typically 260cm x 220cm. Buying two or three sets from the start saves the frustration of a wash day with nothing to put back on the bed.

Mattress weight is worth planning for as well. A pocket sprung super king mattress can weigh over 50kg, which makes rotating it a two person task. Some are one sided and need only rotating head to foot, others need turning fully. Check before you commit if you would struggle with a heavy lift.

Then there is the practical matter of getting the bed into the room. Super king frames arrive in several boxes, but the mattress usually does not. Measure your staircase turn, landing width and doorway before delivery day. Rolled mattresses solve this neatly in flats and terraces with tight access, since they arrive compressed and expand once unwrapped.

Choosing a Super King Frame

The frame material affects how a bed this size sits in a room. At 180cm wide, a super king is already a dominant piece of furniture, so the visual weight of the frame either amplifies that presence or softens it.

Upholstered frames in fabric read as softer and warmer, and a tall buttoned or panelled headboard gives the room a clear focal point. Our range of modern super king size fabric beds UK sale covers everything from low profile designs for rooms with sloped ceilings to statement headboards for high walled Victorian bedrooms.

Wood suits period properties and rooms where you want warmth underfoot as well as at eye level. Oak and walnut finishes pair well with painted walls and natural flooring. Leather frames offer a cleaner, more architectural line and wipe down easily, which appeals in households where the bed sees a lot of daytime use.

Storage is the other decision. Ottoman lift up bases turn the full 180cm x 200cm area underneath into usable storage, which is genuinely transformative in homes without a loft or spare room. The lifting mechanism needs clearance to open, so allow space at the foot of the bed for the base to swing up.

Fitting the Rest of the Bedroom Around It

Once a super king is in place, everything else has to work within the space that is left. Bedside tables are the first casualty in a tight room, since a 180cm bed plus two 45cm cabinets needs 270cm of wall. Wall mounted shelves or narrow floating units solve this where floor standing cabinets will not fit.

Slim modern bedside cabinets UK in widths of 35cm to 40cm keep the essentials to hand without crowding the walkway. Choosing a design with a similar visual weight to the bed frame keeps the room coherent rather than cluttered.

Storage furniture usually needs rethinking too. A tall narrow chest holds the same volume as a wide low one while taking up less wall, which matters when the bed has already claimed the main run. Our modern chest of drawers UK sale includes upright designs made for exactly this problem.

Wardrobe doors are the final check. Hinged doors need up to 60cm of clearance in front, which is often exactly the walkway you have preserved beside the bed. Sliding doors remove that conflict entirely and are worth considering in any room where a super king dominates the floor plan.

Is a Super King Right for Your Room?

The answer usually comes down to three things: the width of the room at its narrowest point, how you use the bedroom during the day, and whether you can get the mattress upstairs.

If the bedroom is used purely for sleeping and has a clear 3.3m wall, a super king is a sound choice and the sleeping comfort is noticeably better than a king. If the room doubles as a dressing area, a home office corner or a place where children pile in on weekend mornings, you may find a king leaves the circulation space that makes the room pleasant to be in.

Height of sleepers matters less than people expect, because a king and a super king are the same length. If length rather than width is your issue, look for extra long frames rather than assuming a bigger size solves it.

We stock the full range of UK bed sizes, so it is worth comparing options in our modern beds UK sale collection before deciding. At Furniture in Fashion you can shop modern furniture across every room, with free delivery to most UK mainland postcodes.

Frequently Asked Questions

What is the exact width of a super king size bed in cm and inches?
A UK super king mattress is 180cm wide, which is 6ft or approximately 71 inches. The length is 200cm, or 6ft 6in.

Is a super king wider than an emperor bed?
No. Emperor beds are a non standard size and typically start at 200cm wide, making them wider than a super king. They are far less common and bedding is harder to source.

Will king size bedding fit a super king bed?
No. King bedding is cut for a 150cm mattress and will not stretch across 180cm. You need bedding specifically labelled super king.

How wide does a bedroom need to be for a super king?
Allow around 3.3m to 3.4m of width for access on both sides. A narrower room can still work if one side of the bed sits against a wall.

Do super king beds come in two mattress halves?
Some do. Zip and link mattresses split into two 90cm halves, which makes delivery easier and lets each sleeper choose a different firmness.