When planning an event, understanding how to calculate seating is the difference between a cramped party and a comfortable, professional-looking occasion. At DIY Marquees, we’ve refined the math of marquee layout to help you maximize your space effectively.
Here is a guide on how to calculate the capacity of your marquee based on different seating styles.
1. The Gold Standard: Round Tables
For formal dining, 5.6ft round tables are the industry standard for efficiency.
- The Math: A 5.6ft table fits perfectly within a 3m x 3m (9m²) square of space. This allows enough room for the table itself and for 10 guests to sit comfortably without their chairs clashing with the next table.
- Capacity: 10 people per 3m x 3m section.
- Standing Rule: If you are transitioning from a seated dinner to a standing reception, you can estimate capacity at 1.5x the seated number (approx. 15 people per 3m x 3m area).
2. Trestle Tables: Informal & Linear
Trestle tables are popular for a “banquet” or communal feel, but they are surprisingly less space-efficient than rounds because of the access required.
- The Math: A standard 6ft trestle table (seating 6 people) requires a footprint of roughly 2m x 3m.
- Why? Unlike rounds, where chairs angle away from each other, trestle seating is parallel. You must account for the depth of the chairs and a “service corridor” behind them so guests can reach their seats without others having to stand up.
3. Theatre Style: Maximum Density
If your marquee is for a presentation, ceremony, or speech, theatre-style rows are the way to go.
- The Math: Allow a 0.5m x 1m space per person. This accounts for the chair width (0.5m) and the leg room/row depth (1m).
- The Aisle: Safety and flow are vital. You must include an aisle of 0.5m to 1m in width. For larger marquees, a central aisle is best; for smaller setups, side aisles may suffice.
Real-World Examples & Sizes
Choosing the right size depends on your specific layout needs. Here are three of our most popular categories:
| Marquee Size | Seated Capacity (Round Tables) | Ideal For | Link |
| 3m x 6m | 20 People | Small garden parties or catering annexes | View 3m Range |
| 4m x 8m | 24-30 People | Intimate family weddings or milestone birthdays | View 4m Range |
| 6m x 12m | 70-80 People | Large weddings or corporate functions | View 6m Range |
(Note: Adding a dance floor, bar, or buffet station will reduce these seated capacities. We recommend sizing up if you plan to include these features.)
Plan Your Perfect Event
Whether you are hosting an intimate garden gathering or a grand wedding, getting the dimensions right is the first step to success. For more help with planning, or to browse our full range of heavy-duty, easy-to-assemble marquees, visit our homepage.
If you would like to play around with seating layouts please use our free interactive marquee planner tool