What size round table seats 6?
135 cm across 53 in · room at least 3.17 × 3.17 m
A round table for 6 people is 135 cm across (53 in), and it needs a room at least 3.17 × 3.17 m (10 ft 5 in × 10 ft 5 in). A rectangular table for the same number is 150 × 90 cm, which fits a narrower room.
Round tables seat fewer people for their size than the edge alone suggests, because the chairs crowd together as they push in towards the middle. Allow each person a generous share of the rim, as this sum does, and nobody sits with a table leg between their knees.
The reward is the conversation: everyone faces everyone, and there is no head of the table. A pedestal base, with one central leg, lets you squeeze in one more chair when you need to.
Worked out for 6 people at a round table in a UK stock size, with 91 cm (36 in) from the table's edge to each wall. Change the numbers
The working
- 6 people.
- Round: seats = floor(π × diameter ÷ 70).
- Least room = table + 2 × 91 cm each way.
The rules, and their sources
Seats at a round table
Our working figure: a round table seats one diner for each 70 cm of its edge, because the chairs crowd together towards the middle. That gives 90–110 cm for 4, 135 cm for 6 and 180 cm for 8, as UK shop charts do.
A rule designers use Sources: furniture.co.uk (Amy, 29 May 2026), Round dining table sizes (checked 31 October 2026); Castlery UK, Round dining tables (checked 31 October 2026).
Space behind the chairs
The NKBA's guidelines: 813 mm (32 in) from the table edge to the wall when nobody passes behind a seated diner, 914 mm (36 in) for someone to edge past, 1118 mm (44 in) to walk past. 75 cm is the least for a chair to pull out.
An industry guideline Sources: NKBA, Kitchen Planning Guidelines, Guideline 8: traffic clearance at seating (checked 31 October 2026); furniture.co.uk (Amy, 29 May 2026), Round dining table sizes (checked 31 October 2026); IKEA Indonesia, Ideal dining table height (checked 31 October 2026).
UK stock dining table sizes
UK shops sell rectangular tables from 120 × 80 cm (four) to 260 × 100 cm (ten), round tables 90–180 cm across and ovals from 150 × 90 to 220 × 100 cm.
Shop sizes Sources: furniture.co.uk (Amy, 14 Mar 2026), Dining table size guide (checked 31 October 2026); furniture.co.uk (Amy, 29 May 2026), Round dining table sizes (checked 31 October 2026); Castlery UK, Round dining tables (checked 31 October 2026).
Other numbers of people
The smallest stock round table for each number, and the least room that leaves 91 cm (36 in) all round it.
| To seat | Round table | Least room |
|---|---|---|
| 4 people | 90 cm across35 in | 2.72 × 2.72 m8 ft 11 in × 8 ft 11 in |
| 5 people | 120 cm across47 in | 3.02 × 3.02 m9 ft 11 in × 9 ft 11 in |
| 6 people this page | 135 cm across53 in | 3.17 × 3.17 m10 ft 5 in × 10 ft 5 in |
| 8 people | 180 cm across71 in | 3.62 × 3.62 m11 ft 11 in × 11 ft 11 in |
Change the numbers
Your sizes will differ. The dining table size calculator opens with these numbers filled in: change any of them and the answer, the working and the drawing follow.
Editorial notes
Worked out by the Snuug team on 12 November 2026 with the same code as the dining table size calculator, so the two cannot disagree. Every rule cites its source, with the date we last checked it. A rule designers use is a convention, not a study.
Other sources the calculator draws on:
- IKEA Switzerland, How much space per person at a dining table (40 cm at an end), checked 31 October 2026