King vs Super King: Which Bed Size Is Right for Your Bedroom?

A standard UK King mattress measures 150 × 200 cm, while a Super King measures 180 × 200 cm. A Super King is 30 cm wider, and both mattresses are the same 200 cm length.

For two people sharing the mattress equally, a King provides 75 cm of width per person and a Super King provides 90 cm. The extra width can be useful, but the right choice also depends on the complete bed frame, bedside tables, wardrobes, walking space and delivery access.

King vs Super King: Quick Comparison

These figures describe the mattress, not the complete bed frame. Upholstered side rails, headboard wings, padding and footboards can make the external frame wider or longer.

How Much Bigger Is a Super King Than a King?

A standard UK Super King mattress is 30 cm wider than a King. A King measures 150 × 200 cm and a Super King measures 180 × 200 cm. Both are 200 cm long.

For a couple, that changes the available width from 75 cm each on a King to 90 cm each on a Super King. The Super King also provides 3.6 m² of mattress area compared with 3.0 m² on a King, an extra 0.6 m².

The extra width does not provide more legroom because the standard mattress length is identical. The real decision is whether the additional 30 cm of mattress width, plus any increase in the external frame, works comfortably in your bedroom.

Is a King Size Bed Big Enough for Two Adults?

For many couples, yes. A UK King gives two people 150 cm of total mattress width and the same 200 cm length as a Super King.

• A King may be the more practical choice if:
• two adults already share a King comfortably
• bedroom width is limited
• you want space for two bedside tables
• wardrobe or drawer access is already tight
• a larger statement frame would make the room feel crowded
• you prefer to keep more open floor space

If you are still deciding between a smaller couple size and a King, the Double Bed vs King Size Bed guide covers that decision in more detail.

Once you know a King suits your room, compare Deeplay's king-size beds by design, storage type and exact external measurements.

When Is a Super King Worth Choosing?

A Super King is worth considering when the extra 30 cm of mattress width adds useful sleeping space and the bedroom can comfortably take the larger frame.

It may suit you if:

• Two people share the bed every night
• You both prefer more personal sleeping width
• A King already feels restrictive
• The bedroom has generous usable width
• Bedside furniture still fits comfortably
• Wardrobes, doors and drawers can still open fully
• The larger frame does not block your main walking routes

A Super King gives each person 90 cm of mattress width when shared equally. Bigger is not automatically better, though. If the larger frame makes the room awkward to use, a King may be the better fit.

If your measurements leave enough practical space, compare Deeplay's super king beds using the dimensions of each individual frame.

How Much Bedroom Space Do King and Super King Beds Need?

There is no single bedroom measurement that guarantees either size will work. The correct check is the full external size of the chosen frame against the usable floor space in your room.

Where the room allows, around 60 cm of clear space on frequently used sides can make movement and furniture access easier. Treat this as practical planning guidance rather than a fixed rule.

Before choosing a Super King, check:

• Space on both sides of the bed
• Room at the foot of the bed
• Bedside-table width
• Wardrobe-door opening
• Drawer-opening space
• Bedroom-door swing
• Radiators and windows
• Plug sockets
• Main walking routes

Use how to measure your bedroom for a bed if you need the full room, furniture and delivery-access process.

How Does an Upholstered Bed Frame Change the Measurements?

Standard mattress dimensions describe the sleeping area. They do not automatically describe the complete size of an upholstered bed.

The external frame can be larger because of:

• Padded side rails
• Upholstery thickness
• Winged or wide headboards
• Deep footboards
• Structural framing
• Ottoman mechanisms
• TV-bed mechanisms

The difference between a King frame and Super King frame is therefore not always exactly 30 cm. That 30 cm figure applies to the standard mattress width. External measurements vary by bed design.

What About Wingback and High-Headboard Beds?

With wingback and high-headboard beds, the headboard can affect both physical fit and the visual scale of the room.

A winged headboard may extend beyond the mattress and side rails. A tall headboard also needs to be checked around windows, wall lights, sockets, shelves, picture rails and sloping ceilings.

This matters more with a Super King because the mattress already uses 180 cm of wall width before the frame and headboard are considered. If the Super King version makes the wall or floor space feel crowded, the King version may give the room a better balance.

King vs Super King Ottoman Beds

The standard mattress comparison stays the same for an ottoman bed: 150 × 200 cm for King and 180 × 200 cm for Super King. The practical difference is how the storage bed works within the room.

Before choosing from Deeplay's storage range, check the complete frame size, opening direction, surrounding furniture and the space you need to operate and access the storage.

Browse Ottoman Beds only after checking that the chosen frame can be used comfortably in your layout.

Do not assume that a Super King automatically has a particular storage capacity. Usable storage depends on the individual construction and mechanism.

 

King vs Super King TV Beds

TV beds need an additional check because the footboard contains the television housing and lift mechanism.

For both King and Super King TV beds, check:

• Total external frame length
• Total frame width
• Footboard depth
• Walking room at the foot of the bed
• Furniture opposite the bed
• Socket position
• TV compatibility listed for the exact model

If a TV bed is part of your plan, compare Deeplay's TV Beds using the product-specific dimensions rather than the mattress size alone.

How Will a Super King Affect Wardrobes and Bedside Tables?

The extra 30 cm of mattress width has to come from the available room width. If the bed stays centred on the same wall, the mattress itself uses an extra 15 cm on each side. The complete frame may change by a different amount, so plan with the actual product measurements.

Bedside tables

Measure both bedside tables as part of the full arrangement. A room can have enough wall width for a Super King frame but not enough space for the bed plus two useful bedside tables.

Wardrobes

Open hinged wardrobe doors fully and check the remaining space between the door and the bed. Leave enough room to stand in front of the wardrobe and use it normally.

Drawers

Measure drawers in their open position. A chest that looks well clear of the bed when closed can need much more room in daily use.

Walking routes

Think about the route between the bedroom door, wardrobe and each side of the bed. A narrow gap that is rarely used matters less than the main path you use every day.

What Should You Check Before Ordering a Super King?

Before choosing the larger size, check all of the following:

• Exact frame width and length
• Headboard width and height
• Footboard dimensions where relevant
• Space beside and at the foot of the bed
• Bedside-table positions
• Wardrobe and drawer openings
• Bedroom-door opening
• Radiators, windows and sockets
• Ottoman access where applicable
• TV-bed footboard space where applicable
• Front and internal doorways
• Hallways, staircases and tight turns
• Landings and lifts where relevant
• The final bedroom entrance

Delivery access matters with any large upholstered bed. A room may have enough space for the assembled frame while a headboard or other large component cannot negotiate a tight staircase or landing.

King or Super King: Which Should You Choose?

Choose a King if:

• You want generous couple sleeping space without using as much floor width
• The room or furniture layout is tight
• Two bedside tables are important to your layout
• Wardrobe and drawer clearance would be reduced by the larger frame
• A Super King statement frame would feel too large for the room
• You are already comfortable sharing a 150 cm-wide mattress

If this sounds closer to your room, compare Deeplay's king size beds using the exact dimensions of each design.

Choose a Super King if:

• You want the additional 30 cm of mattress width
• 90 cm of width per person is useful to you
• The room still has comfortable circulation space
• Bedside tables and wardrobes remain practical
• The chosen frame works with the available wall and floor space
• The delivery route can accommodate the larger components

If the room measurements work, compare Deeplay's super king beds by frame design, storage option and product-specific dimensions.

The better size is not simply the larger one. It is the size that gives you enough sleeping room without making the bedroom harder to use.

FAQs

How much bigger is a Super King than a King in the UK?

A standard UK Super King mattress is 30 cm wider than a King. A King measures 150 × 200 cm and a Super King measures 180 × 200 cm. Both are 200 cm long.

Are King and Super King beds the same length?

Yes. Standard UK King and Super King mattresses are both 200 cm long. The difference is width: King is 150 cm wide and Super King is 180 cm wide.

Is a Super King 30 cm wider than a King?

Yes. The standard mattress-width difference is exactly 30 cm. Shared equally, that gives each person 15 cm more mattress width. The difference between complete bed frames may vary by design.

Is a Super King worth it for couples?

It can be if you value more personal width and the room can take the larger external frame without restricting furniture or walking space. A King provides 75 cm of mattress width per person when shared equally; a Super King provides 90 cm.

Can a Super King fit in a small bedroom?

Possibly, but the 180 × 200 cm mattress measurement is not enough to decide. Check the complete frame dimensions and make sure wardrobes, bedside tables, doors and walking routes still work.

Does a Super King bed have more storage than a King?

A larger ottoman frame may have a larger potential under-bed area, but usable storage depends on the individual bed design. Check the product-specific construction rather than assuming a capacity from mattress size.

Should I measure the mattress or the full bed frame?

Measure the full external bed frame when checking bedroom fit. Mattress dimensions describe the sleeping surface; headboards, side rails, upholstery and footboards can make the complete bed larger.

Is a Super King harder to deliver upstairs?

It can be more challenging because the components may be larger, but access depends on the exact bed and your home. Check doorways, stairs, turns and landings before ordering.

King vs Super King: The Final Decision

A King mattress measures 150 × 200 cm and a Super King measures 180 × 200 cm. The Super King gives you 30 cm more width, while both sizes have the same 200 cm length.

Choose based on the complete bed, not the mattress alone. Check the exact external frame dimensions, the space left for furniture and movement, and the full delivery route before ordering.

Use the Complete UK Bed Sizes Guide if you still need to compare other standard sizes, then move to the relevant king size beds or super king beds once you know what your bedroom can comfortably take.