Conference Room Capacity Calculator
Calculate room capacity for different seating styles — theater, classroom, U-shape, and banquet.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Max Capacity = (Room Area x 0.85) / Sq Ft per Person
Room capacity is calculated by taking 85% of the total floor area (accounting for aisles, equipment, and clearances), then dividing by the square feet required per person for each seating style. The recommended capacity is 80% of maximum for comfortable spacing and fire code compliance.
Worked Examples
Example 1: 40x30 Conference Room Capacity
Problem:Calculate capacity for a 40ft x 30ft conference room in all seating styles.
Solution:Total area: 1,200 sq ft\nUsable area (85%): 1,020 sq ft\nTheater: 1,020 / 6 = 170 max (136 recommended)\nClassroom: 1,020 / 18 = 56 max (45 recommended)\nU-Shape: 1,020 / 25 = 40 max (32 recommended)\nBanquet: 1,020 / 12 = 85 max (68 recommended)\nCocktail: 1,020 / 8 = 127 max (102 recommended)
Result:Theater: 170 max | Classroom: 56 max | Banquet: 85 max
Frequently Asked Questions
How do I calculate conference room capacity?
Conference room capacity depends on the seating arrangement. Divide the usable floor area (total area minus 15% for aisles, AV equipment, and clearances) by the square feet per person for your seating style: Theater = 6 sqft/person, Cocktail = 8 sqft/person, Banquet = 12 sqft/person, Classroom = 18 sqft/person, U-Shape = 25 sqft/person. For fire code compliance, use the recommended capacity (80% of maximum) rather than the absolute maximum.
What are fire code capacity limits for rooms?
Fire codes typically require 7-15 square feet per person depending on the room type and jurisdiction. Standing/assembly spaces usually require 7 sqft per person, unconcentrated seating requires 15 sqft per person, and conference rooms require 15-20 sqft per person. Maximum occupancy is posted and enforced by the fire marshal. Always check local fire codes and venue-specific regulations. The recommended capacity (80% of max) provides comfortable spacing and ensures compliance.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy