What Size Marquee Do I Need? Guest Numbers to Metres

The fastest way to under-order a marquee is to think in guest numbers instead of square metres, because a marquee that comfortably fits 80 people standing around with drinks fits fewer than half that many once you add round tables, chairs and a dance floor. Getting the size right starts with knowing how much floor space a guest actually needs for the kind of event you're running, and that number changes a lot depending on whether people are sitting, standing or dancing.

The space allowance, by event style

Industry hire companies commonly work to these rough allowances per guest, and they're a sensible starting point for your own planning:

• Cocktail or standing event: about 0.9-1.0 square metres per guest. This covers people standing and mingling with the odd cocktail table and canapé station, no seating for everyone.
• Seated dinner with round tables: about 1.4-1.6 square metres per guest. This accounts for the table itself, the chair, and the walking space between tables that catering staff and guests both need.
• Seated dinner plus a dance floor: about 1.8-2.0 square metres per guest, because you're adding a dedicated dance floor area (commonly 0.3-0.4 square metres per guest who'll realistically be dancing at once, which is rarely all of them) on top of the seated footprint, plus space for a DJ or band setup.
• Theatre or ceremony seating (rows, no tables): about 0.6-0.75 square metres per guest, the tightest of the four because there's no table between rows.

These are guides, not guarantees. Round tables use space less efficiently than trestle rows, a live band takes more floor than a DJ booth, and a bar or buffet station eats space wherever it sits. Use them to get in the right size bracket, then confirm the exact layout with your supplier.

Working the numbers

Multiply your guest count by the allowance for your event style to get a target floor area, then look at what standard marquee sizes get you there. A few worked examples:

• 50 guests, seated dinner: 50 x 1.5 = 75 square metres. A 9x9m (81m²) or 6x12m (72m²) marquee is in range.
• 80 guests, cocktail style: 80 x 1.0 = 80 square metres. A 9x9m or 8x10m marquee covers it with a little room to spare.
• 120 guests, seated with a dance floor: 120 x 1.9 = 228 square metres. That's a 12x18m (216m²) or a 15x15m (225m²) structure, at the point where structural permits often start to apply.
• 200 guests, seated with a dance floor: 200 x 1.9 = 380 square metres, landing around 15x24m (360m²) to 18x24m (432m²).

Marquees are supplied in standard modular widths (commonly 3m, 4m, 5m, 6m, 9m and 12m) and lengths added in bays, so your target area rarely lands on an exact off-the-shelf size. Suppliers round up rather than down, which is the right call: it's much easier to have slightly more room than to discover on the day that the caterer's servery doesn't fit. If you want the maths done for you rather than working it by hand, the marquee size calculator takes your guest count and event style and returns a recommended footprint.

What the allowance doesn't include

The per-guest numbers above cover guest seating and circulation. They generally do not include:

• Catering and bar service areas. A buffet line, a mobile bar or a servery for plated service needs its own dedicated floor space, commonly an extra 10-20 square metres depending on scale, and it's easy to forget until the caterer asks where it's going.
• Gift and cake tables, a band stage, a photo booth. Each is a small but real chunk of floor area that competes with guest seating if it isn't planned for separately.
• Wet-weather contingency. If any part of your event (a ceremony, cocktail hour, or overflow) might move under cover if it rains, size for that scenario, not just the sunny-day plan.

Ceiling height and walls matter too, not just floor area

A guest count tells you the floor area, but not the whole structure. Taller centre-pole or A-frame marquees can feel cramped with hanging decor, festoon lighting or a raised stage, where a clear-span marquee with a higher eave gives more usable vertical space. If you're planning heating or cooling, ducted systems in particular need to be specified against the marquee's actual volume, not just its footprint, so get that conversation happening early rather than after the marquee is already booked.

Confirm before you book, don't guess after

Once you have a target size, walk it against the actual site: measure the space where the marquee will stand, check for overhead power lines or low branches, and confirm the ground type, because pegging into grass and ballasting on a hard surface are different jobs with different costs. If the event is a wedding, cross-check your marquee size against the rest of the wedding hire checklist so tables, chairs and dance floor all get booked from the same guest number rather than three slightly different guesses.

Party Hire Near Me lists marquee suppliers across Australia but doesn't measure sites or size structures ourselves; a supplier who's fitted marquees onto backyards and function spaces for years will catch site quirks a guest-count formula can't. Browse marquees and tents to compare real structures and get a size confirmed against your actual site, and see what marquee hire costs once you know roughly what size you're after.