How Many Tables Calculator (round & banquet tables for your guest count)

Understanding the how many tables calculator — concept and principle

This calculator works out how many tables you need for a wedding, party or conference, from the number of guests, the table size and shape, and how much elbow room each guest gets. It also shows the seats per table, the total seats and how many are left empty.

Seats around a round table: with the default inputs the result is 13 tables (91 seats · 6 spare).

How it is calculated

Elbow room per guest: 56 cm (22 in) tight, 61 cm (24 in) standard, 76 cm (30 in) generous.
Round table: seats = ⌊π × diameter ÷ elbow room⌋.
Rectangular or square table: seats = 2 × ⌊length ÷ elbow room⌋ along the long sides, plus 2 × ⌊width ÷ elbow room⌋ if guests sit at the ends.
Tables = guests ÷ seats per table, rounded up.
Empty seats = tables × seats − guests.

The principle

Each guest needs a stretch of table edge for a plate, glass and cutlery and room to move their arms. For a round table, that edge is the circumference, π times the diameter; dividing by the space per guest and rounding down gives the seats. For a rectangular table, only the sides count, and short ends are used only if you choose. Tables come in whole numbers, so the count is always rounded up, which usually leaves a few spare seats.

Worked example

Default inputs: 85 guests, 5 ft (152 cm) round tables, standard 61 cm elbow room.

Circumference = π × 152.4 = 478.8 cm.
Seats = ⌊478.8 ÷ 60.96⌋ = ⌊7.85⌋ = 7 per table.
Tables = 85 ÷ 7 = 12.1, rounded up to 13.
Total seats = 13 × 7 = 91; empty = 91 − 85 = 6.
Guests at the last table = 85 − 12 × 7 = 1.

How to read the result

A last table with only one guest suggests rearranging: you could seat 8 at some tables with tighter spacing, or use a larger table size so the guests divide more evenly. Remember space around the tables too: about 1.5 m (5 ft) between table edges lets chairs pull out and staff pass. Add tables for a head table, gifts, cake or a buffet.

Common mistakes

Using the rental company's "seats up to" figure, which may assume tight spacing.
Forgetting extra space for wheelchairs, high chairs or children.
Ignoring the room's floor area and walkways.
Placing guests at the ends of narrow rectangular tables where there is no knee room.

Keep in mind: Venue capacity, fire exits and aisle widths are set by local rules and the venue. Confirm the layout with your venue before ordering.

Frequently asked questions

How many people fit at a 5 ft round table?

About 7 with 61 cm (24 in) per guest, or 8 with 56 cm (22 in).

How many tables do I need for 85 guests?

13 tables of 7 seats at 5 ft rounds with standard spacing.

How much space should be between tables?

About 1.5 m (5 ft) between table edges is a common guide.

Sources: Circle geometry, circumference = π × diameter (any geometry textbook) · NIST Special Publication 811 (2008), Appendix B (1 ft = 30.48 cm)

Checked 9 Nov 2026. Geometry of the table edge (circumference π × d for rounds); elbow-room widths are example values to choose from, table sizes are common rental sizes in feet with their metric equivalents (1 ft = 30.48 cm).

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