Room For It

Dining table room size calculator

Type your room and your table, then drag the table around the plan. The chair space and the walking room update as it moves, and the verdict comes from the same drawing you are looking at.

Waiting

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Enter your room and table size to see whether it works.

  • Room this table wants—
  • Seats—
  • Tightest side—
SideGapEnough?
The table fits the room. Will it get in through the door? Check the doorway →

Drag the table to move it. The dashed band is the space the chairs and walkway need. Objects can be focused with the Tab key: arrow keys move the focused object, and the [ and ] keys turn it.

Not sure of your numbers? Start from an example:

Wall to wall, left to right on the plan. Type 12' 6" if you like.

Wall to wall, top to bottom on the plan.

Table shape

For a round table, the diameter. The shorter side is ignored.

Across the table, from one person to the one opposite.

Table edge to the back of a chair someone has pushed back to stand up. Dining chairs usually want 24 in; carvers and armchairs want more.

Extra room to get past a seated person. Zero if nobody needs to walk round that way.

Who sits where
What this assumes
  • The two clearance numbers are yours, not ours. There is no single correct figure, so the calculator uses what you type. The defaults — 24 in to pull a chair out, 12 in to walk past — are the figures the trade normally quotes as a working minimum.
  • Chairs are counted as space, not as objects. A pulled-out chair is modelled as a band around the table rather than six separate rectangles, because that is what decides whether the room works.
  • Round and oval tables are measured as ellipses. The outline you see is a 32-sided approximation, which is within about 2 mm of a true curve at these sizes.
  • Nothing else in the room is counted unless you draw it. A sideboard, a radiator or a door that opens inwards will all take space this plan does not know about.

How this calculation works

  1. Table footprint
  2. Add chair pull-out
  3. Add walking space
  4. Compare with each wall

room needed = table + 2 × (chair pull-out + walking space)

The table's own rectangle is the easy part. What decides the room is the band around it: far enough out that a chair can slide back, and then far enough again that somebody can squeeze past. Those two bands are added to each side the chairs use, and the total is compared with the gap to each wall.

The three verdicts mean different things. Fits means every side has the full band. Tight means a chair still pulls out, but nobody can walk behind it. Doesn't fit means a chair cannot be pulled out far enough to sit down, or the table itself is wider than the room.

Room needed at 24 in of chair pull-out and 12 in to walk past
TableSeatsSmallest room
48 × 30 in4–610' × 8' 6"
60 × 36 in611' × 9'
72 × 36 in6–812' × 9'
84 × 42 in6–813' × 9' 6"
96 × 42 in8–1014' × 9' 6"
48 in round5–610' × 10'
60 in round6–711' × 11'

Seats are counted at 24 to 30 inches of table edge per person, which is why the figure is a range. Corners of a rectangular table seat nobody, so each side is counted separately.

The three clearance figures worth knowing

Gap from the table edgeWhat it buys you
24 in / 60 cmA chair slides back far enough to stand up
36 in / 90 cmSomeone can walk behind a seated person
44 in / 110 cmComfortable for serving, or for a chair with arms

Push it against a wall and the answer changes

A table centred in a room needs clearance on four sides. A table with one long side against the wall needs it on three, and gains the best part of a metre. Set the seating to "long sides only" and drag the table up against the top wall to see it: the plan stops asking for chair space at the ends, and rooms that failed a moment ago start to work.

This is the usual fix for a narrow room. It costs you two seats and the ability to walk all the way round, which for most households is a trade worth making.

Round tables buy you corners

A 48 inch round table and a 48 × 36 inch rectangle seat about the same number of people, but the round one turns a square room into a usable one because there is no corner to catch a hip on. Switch the shape and watch the dashed band change: on a round table it stays the same distance out all the way round, which is exactly why they suit tight spaces.

Measure the chair, not the table

The number people get wrong is the pull-out. Measure it: sit on one of your own chairs, push back until you can stand up without turning sideways, and measure from the table edge to the back legs. Dining chairs usually land near 24 inches. Chairs with arms, or anything upholstered, often want 30. That one measurement moves the answer more than anything else on the page.

Common questions

How much space do you need around a dining table?

About 24 inches lets a chair pull out. About 36 inches lets somebody walk behind a seated person. About 44 inches is comfortable for serving. Which one you need depends on the room: a dining room wants 36, a kitchen corner can live with 24 on the side nobody walks down.

What size room do I need for a 72 × 36 inch table?

With 36 inches all round, about 12 ft × 9 ft. With 24 inches at the ends, a 10 ft width will take it. Both figures are in the table above.

Can a dining table go against a wall?

Yes, as long as nobody sits on that side. Choose "long sides only" and the calculator stops reserving chair space at the ends.

Once the table fits the room, the next question is usually whether it will get into the room at all — see will furniture fit through a door. For the reasoning behind the clearance figures, read how much space you need around a dining table.