Categories: Bedroom Furniture

How Big Is a Kingsize Bed?

A UK king size bed measures 150cm wide by 200cm long, which is 5ft by 6ft 6in. The frame around that mattress usually adds between 5cm and 15cm on each side, so a king size bed generally occupies a floor area of about 160cm to 175cm wide by 210cm to 220cm long depending on the style of the frame.

Those extra centimetres are the figures that matter when you are planning a bedroom. A mattress measurement tells you how much sleeping space you gain. The external frame measurement tells you whether the bed fits.

King Size Dimensions in Context

Compared with a standard double at 135cm by 190cm, a king size adds 15cm of width and 10cm of length. Split between two sleepers, that width works out at 75cm each rather than 67.5cm. The extra length is often the more welcome change, because it takes the mattress past the point where a six foot sleeper feels the end of the bed.

Above king size sits the super king at 180cm by 200cm, which gives 90cm each. Below it sits the double, and below that the small double at 120cm. King size is the middle of the upper range: noticeably more generous than a double, without the floor demands of a super king.

Height varies more than any other measurement. Low platform frames can sit around 30cm from the floor once the mattress is on, while a divan base with a deep mattress can reach 65cm. Neither is better, but the difference affects how easy the bed is to get in and out of, and how tall the bedside cabinets need to be.

What Size Room Does a King Size Bed Need?

As a practical minimum, a king size bed suits a room of around 3m by 3.4m. That allows the frame plus roughly 60cm of clear floor on each side and at the foot, which is enough to walk past comfortably, make the bed properly and open a wardrobe.

In a room 2.7m wide you can still install a king size, but one side will sit close to the wall. Some households accept that happily, particularly if only one person needs regular access to both sides. Others find it makes changing the bedding a chore, which is a small daily annoyance that adds up.

Three checks are worth doing before ordering. Measure the wall length where the headboard will sit, including any chimney breast or alcove. Check the arc of every door that opens into the room. And look at where the radiator and sockets sit, because a wider frame often covers at least one of them.

Frame Styles and Their Footprint

Frame design changes the real footprint far more than most people expect. Metal frames sit tightest to the mattress and are the easiest to fit into a room that is close to the limit. Wooden frames with corner posts add width at each corner. Upholstered frames with padded side rails and a deep surround can add a full 15cm on each side, which is 30cm of extra floor.

High gloss and panel designs sit somewhere in between, and they bounce light around a room, which helps a bedroom that faces north or has one small window. You can compare footprints across our modern king size high gloss beds UK sale range, where external sizes are listed alongside the mattress size.

Storage frames need one further check. Ottoman bases lift upwards, so they need clear space above rather than in front, which is worth remembering in a loft room with a sloping ceiling. Drawer bases need clear floor in front of the drawers, usually around 50cm, so they suit rooms with a walkway on that side.

Choosing a King Size Mattress

A wider mattress needs proper support underneath. Look for a centre rail with its own legs and slats spaced no more than about 7cm apart. Without that central support, a king size mattress will dip along the middle over the years regardless of its quality.

For couples of different weights, pocket sprung and hybrid constructions are usually the better choice, because the springs respond independently and reduce the tendency to roll towards the heavier sleeper. Open coil mattresses are more affordable but they transfer movement more readily across a wide surface.

Depth is the last detail. A mattress between 20cm and 25cm suits most frames. Anything deeper looks better in a low frame than a tall one, since a deep mattress in a tall divan can leave very little headboard visible above the pillows.

Dressing a King Size Bed

Bedding for a UK king size is 150cm by 200cm for fitted sheets and 225cm by 220cm for duvets. If one person tends to pull the covers, a super king duvet on a king size bed gives extra drop on both sides and solves the problem without any change to the furniture.

Pillows need thinking about at this width. Two British pillows measuring 50cm by 75cm leave a gap across a 150cm bed, so most people use either four pillows or two plus a long bolster. Getting this right is what makes a wide bed look finished rather than sparse.

Bedside cabinets should be scaled to the bed. Narrow units look undersized beside a wide headboard, and very deep ones intrude on the walkway. Aim for a surface height close to the top of the mattress, and check the depth against the space you have. Our modern high gloss bedside cabinets UK listings include both figures.

Getting a King Size Bed Into the Room

The assembled bed is one problem and the packaging is another. King size headboards are usually delivered as a single rigid panel, and that panel is what has to clear the front door, the staircase turn and the bedroom doorway. Measure the narrowest point on that route before ordering, then compare it with the packed dimensions rather than the assembled size.

Victorian and Edwardian houses cause the most difficulty, particularly where the staircase turns twice with a low ceiling above. If the route is genuinely restricted, a divan base that splits into two halves and a rolled mattress will get through where a rigid frame will not.

It is also worth clearing the room before delivery rather than during it. A king size frame needs floor space to assemble, and building it in a room still holding the old bed is slower and more awkward than moving the old one out first.

Is King Size the Right Upgrade?

King size makes sense if you share the bed every night, if either sleeper is close to six foot, or if children and pets often join you in the morning. It also makes sense in a main bedroom that currently looks underfurnished with a double, since a wider bed anchors a large room properly.

It makes less sense in a room under 2.7m wide, in a bedroom that needs to hold a desk, or where a chest of drawers has nowhere else to go. In those cases a double with well planned storage will serve the household better than a wider bed and no space to walk.

If you have the floor area and want the widest British size, super king is the next step at 180cm. Our super king size wooden beds UK sale range covers that width, and our wider bedroom furniture UK sale pages show frames alongside matching storage. Everything at Furniture in Fashion lists full external measurements so you can check the fit properly before ordering.

Living With a King Size Bed

The daily realities of a wider bed are worth anticipating. Making the bed takes longer, and a duvet at 225cm by 220cm is heavier to shake out than a double one. Most people find it easier to work from one side and then walk round, which is another argument for keeping clear floor on both sides.

Storage under the bed becomes more useful at this size simply because there is more of it. A drawer base on a king size frame holds a surprising amount of spare bedding, which matters in a house without a loft hatch or airing cupboard.

Cleaning is the last practical point. A wide bed pushed against a wall on one side collects dust in the gap that is hardest to reach, so if the room only allows access on one side, leave the gap wide enough for a vacuum head rather than pressing the frame flat to the wall.