How much space per person at a party?

For a standing reception, allow about 0.6 m² per person (UK event-planning guides give 0.5–0.75 m²; 0.5 m² feels very cramped). For seated round tables allow 1.5 m², for long banquet tables 1.2 m², and for theatre-style rows about 0.75 m² per person. These per-person figures cover the guest plus their chair and immediate movement, but not the bar, stage or walkways — those are removed separately by the Efficiency Factor below.

Should I use maximum or comfortable capacity?

Use the comfortable capacity figure. The calculation applies two separate reductions: first the Efficiency Factor (default 85%) removes the floor taken by the bar, DJ, buffet and walkways, then a further 0.85 multiplier (Comfortable = Maximum × 0.85) leaves breathing room so guests are not packed at the absolute minimum density. Maximum capacity fills every usable square metre and feels uncomfortably tight.

How do I measure my venue?

Measure the length and width of the usable space in metres. Exclude fixed features like pillars, stages, or permanent bars. For L-shaped rooms, calculate each section separately and add them together.

Do fire regulations affect capacity?

Yes. UK fire safety law limits venue capacity based on exit widths and numbers. Your calculated capacity may exceed fire limits. Always check with your venue or local fire authority for the official maximum occupancy.

PartyCalcs

Guest Capacity Calculator — Venue Guest Numbers

Work out how many guests fit in your venue space based on room dimensions and layout.

Room Length

Measure the usable floor space in metres, excluding pillars, stages and fixed bars

Room Width

Usable width in metres — exclude any space taken by fixed features

Layout StyleStanding needs ~0.6 m²/person; theatre ~0.75; long tables ~1.2; seated rounds ~1.5

How We Calculate This

This calculator estimates guest capacity from room dimensions and your chosen seating or standing layout.

The formula

Usable area = room length × room width × Efficiency Factor (default 0.85)

Maximum guests = usable area ÷ m² per person

Comfortable guests = maximum guests × 0.85

The Efficiency Factor (default 0.85) removes the ~15% of floor taken by walkways, the bar, DJ and buffet. The separate 0.85 in the comfortable figure then leaves guest breathing room above the absolute minimum density. Space per person by layout: 0.6 m² standing, 0.75 m² theatre, 1.2 m² long tables, 1.5 m² round tables — drawn from UK venue layout guides (venues.london, Town Hall Spaces), which quote 0.5–0.75 m² standing, 0.75–1 m² theatre and 1.2–1.5 m² seated dining.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Adjust quantities based on your guests and event type.