What Size Round Table Seats Six

Round tables are sold by diameter and used by circumference, which is why so many of them seat fewer people than the shop said. The arithmetic takes one line and settles the question before anything is delivered.

The calculation

People sit around the edge, so the number that matters is the length of that edge. Circumference is diameter multiplied by 3.14.

Diameter	Edge length	At 600 mm each	At 550 mm each
900 mm	2827 mm	4 people	5, tight
1000 mm	3142 mm	5 people	5 comfortably
1100 mm	3456 mm	5 to 6	6
1200 mm	3770 mm	6 people	6 comfortably
1400 mm	4398 mm	7 people	8, tight

So six adults want somewhere around 1150 to 1200 mm. That is the honest answer and it is larger than most people expect.

Where 600 mm comes from

It is the width a seated adult occupies with their elbows at a normal eating position, plus the space a place setting needs. A dinner plate is around 270 mm, a side plate and a glass take the rest, and the gap between settings stops people fighting for the same square of table.

You can go to 550 mm for a meal where nobody is cutting anything, and you can go to 500 mm for children. Below that, people eat with their arms in and resent it.

The middle problem that only round tables have

On a rectangular table, the centre strip is always free for dishes. On a round table, every place setting points at the middle, so as the diameter shrinks the usable centre shrinks faster than the edge does.

A place setting is about 350 mm deep from the edge inward. On a 1200 mm table that leaves a 500 mm circle in the middle for serving dishes. On a 1000 mm table it leaves 300 mm, which is one dish. On a 900 mm table the settings practically meet and the food goes on a side table.

This is the reason a 1000 mm round table is excellent for four and awkward for six even before anyone counts elbows.

The base decides whether six is real

Six positions around a circle fall at roughly every 60 degrees. A table with four legs at the corners of a square puts a leg in four of those positions, and a leg between someone's knees is a seat nobody uses twice.

A central column removes that problem entirely. The Round Table is a 1000 mm linoleum top on a folded steel column for exactly this reason: at 1000 mm it genuinely seats five, and four in real comfort, because the whole perimeter is available. Put the same top on four corner legs and you would be down to four seats at best.

The room, not just the table

A chair needs about 750 mm behind the table edge to pull out and sit down, and about 900 mm if someone has to walk behind it while others are seated. The honest planning number is 900 mm on every side.

• 1150 mm table plus 900 mm on each side needs 2950 mm of clear floor, each way.
• 1200 mm table needs about 3000 mm.
• If one side is against a wall or a sideboard, you can drop that side to 750 mm, but you lose the seat there as a comfortable position.

Measure the clear floor, not the room. A radiator, a door swing or a kitchen island all eat into it. The procedure is in how to measure a room before buying furniture, and the clearance logic is expanded in dining table clearance.

Round against rectangular at the same footprint

A 1200 mm circle and a 1200 mm square occupy the same floor. The circle seats six and the square seats four to six depending on the base, because a square puts people at the middle of each side and wastes the corners.

What the round table gives up is extendability and the ability to push against a wall. What it gives you is a shape where everyone can see everyone, which is the actual reason people buy them.

Before you buy

1. Decide how many people eat there on a normal evening, not at Christmas.
2. Multiply by 600 mm.
3. Divide by 3.14 for the diameter you need.
4. Add 1800 mm and check that fits your clear floor in both directions.
5. Check the base. Legs at the corners cost you seats.

Reality check

• Six adults want 1150 mm or more. Most people guess 1000 mm.
• The centre runs out before the edge does.
• A pedestal base is worth one or two seats over corner legs.
• The table is only half the measurement. The 900 mm around it is the other half.
• Buy for a normal evening and put a leaf or a second table away for the once a year.