How much space per person at a party?

For a standing reception, allow 0.6 sqm per person (the absolute minimum is 0.5 sqm but this feels very cramped). For seated round tables, allow 1.5 sqm. Theatre-style seating needs about 0.7 sqm per person. These figures include space for chairs and movement.

Should I use maximum or comfortable capacity?

Always use the comfortable capacity figure. Maximum capacity fills the room completely and leaves no space for a bar, DJ, buffet, or comfortable movement. Comfortable capacity (about 85% of max) gives a much better guest experience.

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

Room Width

Layout Style

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 x room width x 0.85

Max guests = usable area / sqm per person

The 0.85 factor removes 15% of floor space for walkways, bar area, DJ, buffet, and other non-guest areas. Space per person varies: 0.6 sqm standing, 0.7 sqm theatre, 1.2 sqm long tables, 1.5 sqm round tables.

Frequently Asked Questions

Related Calculators

Dance Floor Calculator

Calculate the ideal dance floor size for your party or wedding based on guest count and how many people will be dancing. Free online calculator.

Table Layout Calculator

Plan table sizes, quantities and room layout for your event. Choose from round, rectangular or banquet-style arrangements. Free online calculator.

Chair Calculator

Estimate how many chairs you need for your event including ceremony, dining and spare seating for all your guests. Free online party calculator.

Marquee Size Calculator

Calculate the right marquee dimensions for your event based on guest numbers, table layout, dance floor and bar areas. Free online calculator.

Tent Calculator

Work out the right tent or gazebo sizes and quantities for your outdoor party, festival or garden event. Plan for all weather. Free calculator.

Last updated: February 2026

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