What this calculator does
Event tables & seating works out tables needed for a guest count, for round or rectangular tables. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaRound: seats = ⌊π × diameter / 70 cm⌋; Rectangular: seats = ⌊length / 60 cm⌋ × 2; tables = ⌈guests / seats per table⌉
The inputs explained
| Field | What to enter |
|---|---|
| Guests | A number. Starts at 120. |
| Table shape | Choose from Round, Rectangular. |
| Diameter (round) or length (rectangular) (cm) | A number, measured in cm. Starts at 170. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with guests
Every other input is held at the calculator’s starting values while guests varies. Select any row to load that scenario into the calculator.