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How much space do you need around a dining table?

Reckon on at least 75-80 cm from the table edge to the wall just to sit down, 100 cm if someone needs to walk behind a seated guest, and 120 cm if there's a cabinet on that wall too.

The three distances everything else builds on

The space around a dining table isn't really about the table. It's about what needs to be able to happen on the floor between the table edge and whatever stands in the way next. There are three levels, and they're practically the only numbers you need to remember:

• 75-80 cm: to sit down. Enough to pull the chair back, sit down and push it in again. Under 75 cm you have to twist yourself in from the side. Under 70 cm the chair can't be pulled out at all without the backrest hitting the wall.
• 100-110 cm: to walk behind. Enough for one person to pass behind someone who's sitting down. That's 75-80 cm for the chair plus roughly 30 cm of walking width for a person moving sideways.
• 120-130 cm: to walk behind and use a cabinet. Enough to open a drawer, an oven door or a cupboard door behind the person seated. Oven doors and dishwashers are the worst offenders — an open oven door typically sticks 50-55 cm out into the room.

Choose a level for each of the table's four sides separately. It's entirely normal to have 80 cm on the two sides against the wall and 110 cm on the through-traffic side — that's far better than giving all four sides the same distance.

The maths for the room's size

The clear floor area you need is simply the table's dimensions plus the distance on each side:

The room's clear width = the table's width + the distance on the left + the distance on the right.

Example 1 — a table for six. Table: 180 × 90 cm. All four sides need 80 cm to sit.
Length: 180 + 80 + 80 = 340 cm. Width: 90 + 80 + 80 = 250 cm. So the clear floor area needs to be at least 3.40 × 2.50 m = 8.5 m².

Example 2 — the same table, with a walkway all the way round. Now 100 cm on every side.
Length: 180 + 200 = 380 cm. Width: 90 + 200 = 290 cm. The clear floor area becomes 3.80 × 2.90 m = 11.0 m².

Example 3 — the table pushed against the wall on one side. A 180 × 90 cm table pushed right up against the wall: that side isn't used for sitting.
Length: 180 + 80 + 80 = 340 cm. Width: 90 + 0 + 100 = 190 cm. Now the table fits into a 3.40 × 1.90 m alcove — but two seats are gone.

Note the word clear floor area. The room's dimensions aren't the same as the clear area: a radiator sticks out 8-12 cm, a skirting board 1-2 cm, a door that swings into the room eats a circle with its width as the radius, and a cabinet eats its own depth. Always measure from whatever is actually in the way.

How big does the table itself need to be?

The table's size follows from how many people are going to sit at it. Two numbers govern it:

• 60 cm of table edge per person. That's a comfortable place-setting width. 55 cm works for everyday use, 65-70 cm feels generous.
• The table's depth: 80-90 cm for a rectangular table. 80 cm gives room for two rows of plates facing each other. 90-100 cm also gives a centre strip for serving dishes, bowls and candles — that's what makes the difference when there are guests.

Rectangular tables, as a rule of thumb: 4 people: 120-140 × 80-90 cm. 6 people: 160-180 × 90 cm. 8 people: 200-220 × 90-100 cm. 10 people: 260-280 × 100 cm. Seat people at the ends too and you gain two more places — but only if the table's legs aren't in the corners.

Round tables: 4 people: 100-110 cm across. 6 people: 120-135 cm. 8 people: 150-160 cm. A round table is pleasant for a few people and impractical for many — at 8 people there's 60 cm between neighbours along the rim, but well over a metre and a half across the table, and then you can't talk to each other.

A round table does, however, make better use of a room's corners than a rectangular one: you can pass a round table on the diagonal, where a rectangular table would have cut the room in two.

The chair is what you forget to measure

The 75-80 cm distance applies to an ordinary dining chair with a backrest. Three chair types change the maths:

• Chairs with armrests need to be able to slide in under the table, otherwise they always stand out into the room. Measure the height from the floor to the top of the armrest and compare it with the underside of the tabletop — if the armrest is higher, allow 15-20 cm more clearance to the wall.
• Armchairs and upholstered dining chairs are often 60-65 cm deep against an ordinary chair's 45-50 cm. Add the difference to the clearance.
• Benches are the big space-saver: a bench slides in under the table and typically only needs 40-50 cm behind it, because you sit down from the side or climb in. A bench along the wall can create a dining spot in a room that's 60 cm too narrow for chairs.

Bar stools at a kitchen island follow a different rule: here you need roughly 30 cm from the front edge of the worktop to the front of the stool for your legs, and 90-100 cm behind the stool if someone needs to be able to pass behind whoever is seated.

How to work it out in your own home

1. Measure the room's internal dimensions — wall to wall, not the area listed in the official building register. Official areas are typically measured to the outside of the exterior walls and say nothing about how wide the room actually is inside.
2. Subtract everything standing along the walls: cabinet depth, radiator, skirting board, bay window frame.
3. Mark the table's outline on the floor with painter's tape at the size you're considering. It takes five minutes and is the best test there is.
4. Put the chairs in place, sit down, and try to walk behind. Also try opening any door that swings into the room.
5. Check that the table can even get in: a table 90 cm deep needs to be able to turn in the hallway, and a corner between two 90 cm-wide passages can't turn anything that's 90 cm deep.

If you want to try out several tables before buying, you can do it on a measured floor plan instead of with tape. HouseSense gives you the home's internal measurements room by room, whether you scan with the iPhone's LiDAR or draw the plan with your finger, and you can place furniture on the drawing and see what's left of the floor. Furniture is shown as flat rectangles seen from above, the way an architect draws them, precisely because it's the footprint on the floor that decides the matter. And when the numbers are tight, the same rule applies as always: the drawing may be dressed up, but the last five centimetres have to be measured.