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Tent Size Calculator: What Size Tent for Your Guest Count

General answer

Use rental-industry comfort densities: 10–12 ft² per guest for a seated dinner at round tables, 5–6 ft² standing/cocktail, 8–10 ft² for ceremony rows. A 100-guest seated dinner needs 1,000–1,200 ft² — a 20×60 or 30×40 tent — before adding dance floor, bar, buffet or stage, which are separate blocks. Fire-code occupant loads (15/7/5 ft² per person) are legal maximums, not planning targets.

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1,000–1,200 ft²Industry guidance

Comfort planning density from rental/marquee industry charts (10–12 ft² ≈ 1.2–1.5 m² per seated guest). Add dance floor, bar, buffet and stage as separate blocks — they are not in per-person math.

Fire-code ceiling for comparison: 80 people could legally occupy this area — the posted occupant load is a legal maximum, never a planning target.

Anchor: the 20×40 tent

Rental charts agree on the anchor: a 20×40 (800 ft²) tent seats about 80 for dinner or holds ~100 for cocktails/ceremony rows — exactly what the 10 ft² seated / 6-8 ft² standing math predicts. Size up, never down: an over-sized tent costs a little more; an under-sized one fails in the rain when everyone must be inside it.

Assumptions

  • Rental-company planning charts (tier-3 industry docs), corroborated across firms.
  • Net usable area — poles, catering staging and walkways reduce it.

What changes this answer

  • Layout: the same 100 guests need half the space standing as seated.
  • Add-ons: a dance floor cuts seating capacity 20–30% if not added as its own block.
  • Table style: 60" rounds seat 8 comfortably — long banquet tables pack tighter.

Common questions

What size tent do I need for 100 guests?

Seated dinner: 1,000–1,200 ft² (20×60 or 30×40). Cocktail style: 500–600 ft² (20×30). Add dance floor, bar and buffet as separate space blocks on top.

Sources

Last checked 2026-07-22. Tiers: 1 government/regulator · 2 industry body · 3 official supplier docs · 4 large surveys · 5 professional material.

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