Bedroom
Bed sizes and the room each one needs
A mattress is the easy number. The room around it is the one that decides whether you can open a drawer.
On this page (8 sections)
Short answer
A queen (60 x 80 in / 152 x 203 cm) needs a room of about 10 x 11 ft (3.0 x 3.35 m) once you allow 30 in (76 cm) on each used side and 36 in (91 cm) at the foot. A king (76 x 80 in / 193 x 203 cm) needs about 12 x 11 ft (3.66 x 3.35 m) and fails in most 11 ft rooms. Add 2 to 6 in (5 to 15 cm) per side for the frame and 3 to 12 in (8 to 30 cm) of length for a headboard before you measure anything.
The numbers, at a glance
- Queen mattress
- 60 x 80 in (152 x 203 cm)
- King mattress (US)
- 76 x 80 in (193 x 203 cm)
- Clearance, each used side
- 30 in (76 cm)24 in is the hard minimum
- Clearance at the foot
- 36 in (91 cm)walking route
- Minimum room, queen
- 10 x 11 ft (3.0 x 3.35 m)
- Minimum room, king
- 12 x 11 ft (3.66 x 3.35 m)
- Frame adds per side
- 2 to 6 in (5 to 15 cm)
- Headboard adds to length
- 3 to 12 in (8 to 30 cm)
US mattress sizes#
Six sizes cover almost every bed sold in North America. Width varies; length moves only twice, at twin XL and California king.
| Size | Inches | Centimetres | Notes |
|---|---|---|---|
| Twin (single) | 38 x 75 | 96.5 x 190.5 | One adult or a child |
| Twin XL | 38 x 80 | 96.5 x 203 | Two make a king |
| Full (double) | 54 x 75 | 137 x 190.5 | 27 in per person |
| Queen | 60 x 80 | 152 x 203 | The default for two adults |
| King (Eastern) | 76 x 80 | 193 x 203 | 38 in per person |
| California king | 72 x 84 | 183 x 213 | Narrower and longer than a king |
A full gives each of two adults 27 in (69 cm) of width, 11 in (28 cm) less than one person gets in a twin. A king is two twin XL mattresses side by side, which is why split king adjustable bases exist.
UK sizes#
UK beds are quoted in centimetres and none match a US size.
| UK name | Centimetres | Inches |
|---|---|---|
| Single | 90 x 190 | 35.5 x 75 |
| Double | 135 x 190 | 53 x 75 |
| King | 150 x 200 | 59 x 79 |
| Super king | 180 x 200 | 71 x 79 |
A UK super king is still 13 cm (5 in) narrower than a US king. No UK size matches a US king.
EU and IKEA sizes#
Continental Europe standardises on a 200 cm length and widths in 20 cm steps. IKEA labels 140 as "double", 160 as "queen" and 180 as "king" in English-language markets, which is where the trouble starts.
| EU size (cm) | Inches | Marketed as |
|---|---|---|
| 90 x 200 | 35.5 x 79 | Single |
| 140 x 200 | 55 x 79 | Double |
| 160 x 200 | 63 x 79 | Queen |
| 180 x 200 | 71 x 79 | King |
What the frame adds#
The mattress dimension is never the planning dimension.
- Slim platform or metal frame: 2 to 3 in (5 to 8 cm) per side.
- Timber frame with an outer rail, or upholstered sides: 3 to 5 in (8 to 13 cm) per side.
- Storage bed with drawer boxes, or a heavily padded frame: up to 6 in (15 cm) per side.
- Headboard: 3 to 12 in (8 to 30 cm) of length. A wall-mounted panel adds 3 in, a floor-standing upholstered headboard on its own legs adds 8 to 12 in.
- Footboard, where fitted: another 2 to 6 in (5 to 15 cm), taken out of your foot clearance.
For planning, use the mattress width plus 4 in (10 cm) and the mattress length plus 6 in (15 cm), then correct it with the real product dimensions.
The clearance rule that sets room size#
Every room size below comes from one rule, set out in bedroom clearances:
Minimum room size by bed size#
"Comfortable" applies 30 in on both sides and 36 in at the foot with a mid-range frame. "Tight but workable" drops to 26 to 28 in at the sides and assumes nothing stands on a side wall.
| Bed | Frame footprint (in) | Comfortable room | Tight but workable | Metric (comfortable) |
|---|---|---|---|---|
| Twin, one side to a wall | 42 x 81 | 7 ft x 10 ft | 6 ft 6 in x 9 ft 6 in | 2.13 x 3.05 m |
| Twin, both sides used | 42 x 81 | 8 ft 6 in x 10 ft | 8 ft x 9 ft 6 in | 2.59 x 3.05 m |
| Twin XL | 42 x 86 | 8 ft 6 in x 10 ft 6 in | 8 ft x 10 ft | 2.59 x 3.20 m |
| Full | 58 x 81 | 10 ft x 10 ft | 9 ft 6 in x 9 ft 6 in | 3.05 x 3.05 m |
| Queen | 64 x 86 | 10 ft 6 in x 11 ft | 10 ft x 10 ft 6 in | 3.20 x 3.35 m |
| King | 80 x 86 | 12 ft x 11 ft | 11 ft 6 in x 10 ft 6 in | 3.66 x 3.35 m |
| California king | 76 x 90 | 11 ft 6 in x 11 ft 6 in | 11 ft x 11 ft | 3.51 x 3.51 m |
Frame footprint is the mattress plus 4 in of width and 6 in of length. Run your own wall lengths through the bedroom layout checker.
The honest minimum for a queen#
Strict arithmetic says a queen needs 124 in (10 ft 4 in) of width and 122 in (10 ft 2 in) of length. Rooms are not sold in those increments, so the working answer is about 10 x 11 ft (3.0 x 3.35 m), and shape matters more than area.
Turn the same room 11 ft wide by 10 ft deep and the queen struggles: 132 in of width gives generous 34 in aisles, but 120 in of length leaves 34 in at the foot before any door, and the door is nearly always in that wall.
Why king beds fail in 11 ft rooms#
The order to solve the constraints in#
- Measure at floor level, wall to wall, both directions, and note every door swing, radiator and sill.
- Decide which sides of the bed are used. A bed with one side against a wall halves its space demand and doubles the effort of making it: a fair trade in a guest room, a bad one in a main bedroom.
- Set the bed size from the width, not the area. Width is the binding constraint in almost every bedroom because mattress lengths barely vary.
- Place clothes storage before nightstands. Storage needs 36 to 40 in (91 to 102 cm) of clear floor in front of an open drawer, which is covered in closet and wardrobe dimensions.
- Fill the remaining head-zone slots with nightstands, sized to what is left rather than to a catalogue: see nightstand dimensions and height.
- Check the bed will get up the stairs. A king box spring will not turn most stairwells; a split base or a bed-in-a-box will. Measure the route using furniture delivery path clearances before the delivery slot, not after.
Frequently asked questions#
What size room do I need for a king bed?
About 12 x 11 ft (3.66 x 3.35 m). A US king frame is roughly 80 in (203 cm) wide once you allow 2 in (5 cm) of rail each side, which leaves 30 in (76 cm) on each side only when the room is 140 in (356 cm) wide. In a 12 ft room you get 32 in (81 cm) per side. In an 11 ft room you get 26 in (66 cm), which works until you put a wardrobe or a chest on a side wall.
Will a queen bed fit in a 10 x 10 ft room?
Yes, but only with the bed centred on one wall and nothing on the side walls. A 64 in (163 cm) queen frame in a 120 in (305 cm) room leaves 28 in (71 cm) each side. Lengthwise, 86 in (218 cm) of bed and headboard leaves 34 in (86 cm) at the foot. Both are one notch under the comfortable figures but above the 24 in (61 cm) minimum.
Is a UK king the same as a US king?
No, and the gap is large. A UK king is 150 x 200 cm (59 x 79 in). A US king is 193 x 203 cm (76 x 80 in), which is 43 cm (17 in) wider. A UK king is closest to a US queen (152 x 203 cm) and is 2 cm narrower and 3 cm shorter, near enough to look identical in a photograph and far enough to make fitted sheets sit badly.
How much space do you need between the bed and the wall?
30 in (76 cm) where you get in and out, 24 in (61 cm) as an absolute minimum, and 36 in (91 cm) where you also open a wardrobe or a chest of drawers on that wall. A side you never use, such as a bed pushed into a corner, needs nothing, but you pay for it every time you change the sheets.
Does a bed frame make the bed bigger?
Almost always. A slim metal or upholstered platform adds 2 to 3 in (5 to 8 cm) per side. A frame with an outer timber rail or a storage drawer box adds 4 to 6 in (10 to 15 cm) per side. Headboards add 3 to 12 in (8 to 30 cm) of length, and a padded headboard with a floor-standing frame is at the top of that range.
What is the smallest bedroom that counts as a double?
In the UK the Nationally Described Space Standard sets a double bedroom at 11.5 m2 (124 sq ft) with a minimum width of 2.75 m (9 ft). US practice follows the IRC, which requires a habitable room of at least 70 sq ft (6.5 m2) with no horizontal dimension under 7 ft (2.13 m). Neither figure guarantees the bed will have usable clearance.
Twin XL or full for a teenager?
A twin XL (38 x 80 in / 96.5 x 203 cm) is 5 in (13 cm) longer than a standard twin and the same width, so it suits height without eating the room. A full is 16 in (41 cm) wider and 5 in (13 cm) shorter than a twin XL, which is worse for anyone over about 6 ft (183 cm) and much harder to fit under 10 ft (3.05 m) of room width.
Sources and standards referenced#
- Human Dimension and Interior Space Panero and Zelnik, Whitney Library of DesignAnthropometric clearance for dressing, kneeling and passing
- Architects' Data Ernst Neufert, Wiley-BlackwellBed and bedroom planning dimensions
- Metric Handbook: Planning and Design Data RoutledgeUK bed sizes and bedroom layouts
- Technical Housing Standards: Nationally Described Space Standard UK Department for Communities and Local Government, 2015Double bedroom 11.5 m2 and 2.75 m minimum width
- 2021 International Residential Code, Section R304 International Code CouncilHabitable room minimum 70 sq ft and 7 ft minimum dimension
- 2010 ADA Standards for Accessible Design US Department of Justice36 in circulation path, 60 in turning space
We cite published codes, industry planning guidelines and manufacturer specifications. Where a figure is our own recommendation rather than a published standard, the text says so. See how we measure.