How Big Is a 3×7 Meter Room?
A 3×7 meter room is 21 square meters (226 sq ft) — roughly 5.4 king-size beds of floor space — comparable to a one-car garage.
3×7 m at a Glance
A flat rectangle only tells you so much. Run the full calculator or draw this room in 3D below.
Is a 3×7 Meter Room Big?
It depends entirely on what the room is for. At 21 sq m, here's how a 3×7 m space rates against typical room sizes:
| As a... | Verdict | Typical Range |
|---|---|---|
| Living Room | medium | 13.9–23.2 m² |
| Bedroom | large | 13.9–23.2 m² |
| Dining Room | large | 16.7–27.9 m² |
| Home Office | above typical | Above the typical range (up to 18.6 m²) |
| Kitchen | large | 16.3–27.9 m² |
| Bathroom | above typical | Above the typical range (up to 13.9 m²) |
Benchmarks from our standard room dimensions guide.
Planning a 3×7 Meter Room
3×7 m is the through-lounge of a British terrace with the dividing wall removed, the long single garage that also takes a motorbike, and the kitchen-diner of a narrow semi-detached extension. Twenty-one square metres at 3 m wide is a corridor of rooms.
At 1:2.33 the 700-cm length holds three zones of 233 cm or two of 350. Nothing changes about the 300-cm width: seating still faces across it with an 80-cm path, and a dining table sits along the room, not across it (a 90-cm-wide table with chairs both sides needs 90 + 90 + 90 = 270 cm, leaving a 30-cm path).
What this size is best used for
- 1Lounge-diner
Sofa group in the far 350 cm and a 160×90-cm table along the near half with chairs on one long side only (90 + 90 = 180 cm of the 300-cm width, 120 cm of path), plus a chair at each end (700 − 350 − 160 = 190 cm, 95 per end).
- 2Kitchen-diner
A 360-cm run of units on one long wall at the far end, a 160×90-cm table on the same wall at the near end (360 + 160 = 520 cm of 700), and 300 − 90 = 210 cm beside the table: 45 cm for a pulled-out chair and 165 cm of path.
- 3Garage for a car and a motorbike
A 460-cm car in the front 460 cm, and in the rear 240 cm a motorbike (220 cm long, 80 cm wide) parked lengthwise beside a 60-cm-deep bench: 80 + 60 = 140 cm of the 300-cm width, 160 cm to walk.
Lounge-diner in a 3×7 m room
Furniture sizes are the same true-to-scale pieces in the RoomSketch3D catalog; clearances are what is left after each step.
- Far zone (350 cm): sofa 220×90 cm on the left wall from the far corner, coffee table 100×50 cm 40 cm in front, TV unit 120×40 cm on the right wall opposite; path between table and unit: 300 − 90 − 40 − 50 − 40 = 80 cm. A 60-cm armchair on the far 3-m wall beside the sofa's end.
- Table 160×90 cm along the room's centreline in the near zone, its far end 100 cm from the sofa's near arm (350 − 220 − 100 = 30 cm of overlap into the seating zone is fine, since the sofa sits against the left wall and the table is centred).
- Chairs: two on the right long side pull out 45 cm into the 105-cm strip between table and right wall; two on the left side into the 105-cm strip on the left; one at each end into 95 cm.
- Door in the near 3-m wall, hinged at the left corner, swinging into the 700 − 350 − 160 − 95 = 95 cm beyond the near end chair; a 120×40-cm sideboard on the near wall's right half.
Mistakes this size invites
- The table across the room: 160 cm of table on a 300-cm width leaves 70 cm each side, so nobody can sit at the ends and the room is cut in two.
- Two sofas facing each other across the 3-m width: 90 + 90 = 180 cm of sofa leaves 120 cm for a 50-cm table and two 35-cm paths.
What Furniture Fits in a 3×7 Meter Room?
Working from 21 square meters with standard walkway clearances (about 90 cm), here's what comfortably fits depending on how you use the room:
As a Living Room
- 3-seater sofa
- Coffee table
- 2 armchairs
- Entertainment center
- Side tables
As a Bedroom
- King bed
- 2 nightstands
- Dresser
- Desk area
- Seating area
- Walk-in closet possible
As a Dining Room
- Large table (72-96 inch)
- 8+ chairs
- China cabinet
- Sideboard
- Bar area
Maximum Furniture Sizes for a 3×7 m Room
Lists like this can't tell you if it actually works
"A 3-seater sofa fits" is true — until the door swing eats half a meter of wall, the radiator blocks the long wall, or the walkway to the window shrinks to 50 cm. The only way to know your layout works is to see it: draw the 3×7 m room, place real furniture at true scale, and check the flow.
That's exactly what RoomSketch3D does. Drag-and-drop true-to-scale furniture pieces into your exact room and walk through it in 3D — before you buy, move, or assemble anything.
Draw your 3×7 m room and see what fits
Stop imagining layouts. Build this exact room in RoomSketch3D, try furniture arrangements in minutes, and see it in 2D & 3D.
One-time $19.99 purchase. No subscription. True-size furniture, custom sizes.
Frequently Asked Questions
How many square meters is a 3x7 room?
A 3x7 meter room is 21 square meters (3 m × 7 m = 21 m²), which is 226 square feet. Its wall perimeter is 20 meters, the figure you need for skirting, wallpaper and cable runs.
What is a 3x7 meter room in feet?
A 3x7 meter room measures 9.8 × 23 feet, for a total area of 226 square feet.
What is a 3x7 meter room best used for?
Lounge-diner. Sofa group in the far 350 cm and a 160×90-cm table along the near half with chairs on one long side only (90 + 90 = 180 cm of the 300-cm width, 120 cm of path), plus a chair at each end (700 − 350 − 160 = 190 cm, 95 per end).
What is the most common layout mistake in a 3x7 meter room?
The table across the room: 160 cm of table on a 300-cm width leaves 70 cm each side, so nobody can sit at the ends and the room is cut in two.