question: How do people calculate the maximum capacity of people in places like gyms and lunchrooms?
comment: “In order to determine the maximum number of people who are able to safely be in a room or building, the IBC recommends a certain number of inches of doorway per occupant. Exits that consist of a stairway need to have 0.3 inches of doorway per person, and all other exits need 0.2 inches of doorway per person. So a function hall that has a maximum occupancy of 1,000 people and an exit that consisted of a corridor without stairs will need 200 inches of doorway. With doorways at around 36 inches in width—wider than the Americans with Disabilities Act requires in the United States—that function hall would need approximately six such doors.” [Source]( URL_0 ) Basically, you need to have a certain amount of space available in a doorway per person. All based on building codes, how large the room is, how many people you want to accommodate and how much space the doorways have.
passages: The large numbers of people involved in demography are often difficult to comprehend. A useful visualisation tool is the audience capacity of large sports stadiums (often about 100,000). Often the capacity of the largest stadium in a region serves as a unit for a large number of people. For example, Uruguay's Estadio Centenario is often used in Uruguay, while in parts of the United States, Michigan Stadium is used in this manner. In Australia, the capacity of the Melbourne Cricket Ground (about 100,000) is often cited in this manner. Hence the Melbourne Cricket Ground serves as both a measure of people and a unit of volume.
   The table shows the weighting factors used in the standardization of workloads.
  
  Table: Age by Sex Weights for SWPE Standardisation
  
  Section::::Types of health facility.
  
  Section::::Types of health facility.:Hospital.
   The International Fire Code, portions of which have been adopted by many jurisdictions, is directed more towards the use of a facility than the construction. It specifies, "For areas having fixed seating without dividing arms, the occupant load shall not be less than the number of seats based on one person for each 18 inches (457 mm) of seating length". It also requires that every public venue submit a detailed site plan to the local fire code official, including "details of the means of egress, seating capacity, [and] arrangement of the seating..."
   In Australia the workload of a health facility is used to determine the level of government funding provided to that facility. The government measures a facility (or health practice) in terms of its standard whole patient equivalent (SWPE). The SWPE calculation is determined by analysis of the patients that attend that facility. The calculation takes into account the proportion of health services (in dollars) rendered at that facility relative to others that each patient attends. It includes a weighting factor based on each patients demography to account for the varied levels of services required by patients depending on their gender and age. The premise of weighting is that patients require different levels of health services depending on their age and gender. For example, the average male patient requires fewer consultations than his older and infant counterparts. 
   Section::::Health facility workload.
  
  The workload of a health facility is often used to indicate its size. Large health facilities are those with a greater patient load.
   The OEE index makes it easy to determine whether we have ample capacity to run the required production. In this example 4.2 hours at standard versus 4.9 hours based on the OEE index. 
  
  By repeating this process for all the parts that run through a given machine, it is possible to determine the total capacity required to run production.
  
  Section::::Capacity.:Capacity available.
   This is the maximum number of tourists that an area is actually able to support. In the case of an individual tourist attraction it is the maximum number that can fit on the site at any given time and still allow people to be able to move. This is normally assumed to be around 1m per person.
  
  “PCC per a day = area (in metres squared) x visitors per metre x daily duration" (Mowforth and Munt)
  
  This is a formula which has been used to calculate the physical carrying capacity.
  
  Section::::Economic carrying capacity.
   A method of determining how many people are at an event is the scientific analysis of photographs, video images, or both. Based on the quality of the image, it is possible to do a physical head count or to estimate attendance based on the density of people within similar areas. This permits the estimation of people over large areas or where parts of the image are obscured. An extensive discussion of how images were used to estimate the number of attendees at the Million Man March can be found at the Center for Remote Sensing at Boston University's website.
  
  Section::::References.
   The estimations in the above tables are based weight and height data from the U.S. NCHS National Health and Nutrition Examination Survey (2011-2014).
  
  There was an average BSA of for 3,000 cancer patients from 1990 to 1998 in a European Organisation for Research and Treatment of Cancer (EORTC) database.
  
  During 2005 there was an average BSA of for 3,613 adult cancer patients in the UK. Among them the average BSA for men was and for women was .
   The predicted value of FRC was measured for large populations and published in several references. FRC was found to vary by a patient's age, height, and sex. Functional residual capacity is directly proportional to height and indirectly proportional with obesity. It is reduced in the setting of obesity primarily due to a reduction in chest wall compliance. An online calculator exists that will calculate FRC for a patient using these references.
   Functional capacity can also be expressed as "METs" and can be used as a reliable predictor of future cardiac events. One MET is defined as the amount of oxygen consumed while sitting at rest, and is equal to 3.5 ml oxygen per kilogram body weight per minute. In other words, a means of expressing energy cost of physical activity as a multiple of the resting rate. For instance; walking on level ground at about 6 km/h or carrying groceries up a flight of stairs expends about 4 METs of activity. Generally, 7 METs of activity tolerance is considered excellent while 4 is considered poor for surgical candidates. Determining one's functional capacity can elucidate the degree of surgical risk one might undertake for procedures that risk blood loss, intravascular fluid shifts, etc. and may tax an already strained cardiovascular system.
   A common measure of volume in Australia, and in the state of Victoria in particular, is the Melbourne Cricket Ground, the largest stadium in Australia and 13th largest in the world. The volume of the Melbourne Cricket Ground is 1,574,000 cubic metres, or about 630 Olympic swimming pools. The seating capacity of the Melbourne Cricket Ground (100,000 ) is also used as a unit measure of the .
  
  Section::::Volume.:Sydney Harbour.
   BULLET::::- 2013: Sandcastle Waterpark took part in the Worlds Largest Swimming Lesson. As part of the event Sandcastle Waterpark was recognised as hosting the largest number of participants in the UK. The Guinness World Record was set at 24,873 participants, 432 facilities in 13 countries.
  
  BULLET::::- 2012: Sandcastle Waterpark was an official host location for The World’s Largest Swimming Lesson, which set a new world record on 11 June 2012 for the largest simultaneous swimming lesson ever conducted.
   The World Health Organization is concerned with overcrowding of sleeping accommodation primarily as a risk for the spread of tuberculosis and has attempted to develop measurement indicators. 
  
  Section::::Measures of overcrowding.:United Kingdom.
  
  The Housing Act 1985 states:
   Section::::Methodology.
  
  Crowd density refers to the number of objects within a unit area, such as people per square meter. Density is important to determine the maximum occupancy of a room or building to address safety concerns. Analyzing areas which become more densely packed than others is essential for designing buildings and evacuation routes. Addressing such concerns involve the management and optimization of the crowd and its predict movement patterns.
   Seattle's world record was broken on January 31, 2016 in Saskatoon, Saskatchewan Canada, where more than 20,000 participants came to Victoria park to attempt the Guinness World Record. Rick Mercer was one of the participants who came to shoot an episode about Team Canada's Yukigassen team and compete in the world record. Underestimating the number of participants the event ran out of their 8200 wristbands hours before the competition took place. In total 7,681 participants was the official Guinness record and was achieved by the City of Saskatoon thanks to Yukigassen Team Canada
   BULLET::::- In Modesto, California, the record for phonebooth stuffing was broken as 32 "slightly built" students at Modesto Junior College packed themselves into a regulation sized booth—7 feet tall and 32 inches square. However, for safety reasons, the booth was set on its side, and the telephone had been removed. Earlier in the month, 25 students in South Africa had broken the record of 19.
   The term "average length of stay" (ALOS) is also applicable to other industries, e.g. entertainment, event marketing, trade show and leisure. ALOS is used to determine the length of time an attendee is expected to spend on a site or in a venue and is part of the calculation used to determine the gross sales potential for selling space to vendors etc. and affects everything from parking to sanitation, staffing and food and beverage. Almost all operational aspects can be altered by an attendee's ALOS.
   Dunbar's surveys of village and tribe sizes also appeared to approximate this predicted value, including 150 as the estimated size of a Neolithic farming village; 150 as the splitting point of Hutterite settlements; 200 as the upper bound on the number of academics in a discipline's sub-specialisation; 150 as the basic unit size of professional armies in Roman antiquity and in modern times since the 16th century; and notions of appropriate company size.
   Canadian athletic facilities are often listed by their "maximum capacity", which is often an estimate of their largest recorded crowd in the facility. These maximum capacities can and often do include standing room patrons and attendees seated on grass surrounding a playing field. Seated Capacity is the actual number of permanent seats, be they grandstands or permanently in use bleachers. This is why you will sometimes see larger capacities listed for these sites when searching for them on line. When capacity numbers have mismatched on source sites, unless the larger capacity could be confirmed as a seated capacity, the smaller capacity number has been listed here.
   Canadian athletic facilities are often listed by their "maximum capacity", which is often an estimate of their largest recorded crowd in the facility. These maximum capacities can and often do include standing room patrons and attendees seated on grass surrounding a playing field. Seated Capacity is the actual number of permanent seats, be they grandstands or permanently in use bleachers. This is why you will sometimes see larger capacities listed for these sites when searching for them on line. When capacity numbers have mismatched on source sites, unless the larger capacity could be confirmed as a seated capacity, the smaller capacity number has been listed here.
   For larger volumes of liquid, one measure commonly used in the media in many countries is the Olympic-size swimming pool. A Olympic swimming pool, built to the FR3 minimum depth of would hold . The US National Institute of Standards and Technology (NIST) defines the Olympic swimming pool as 1 million litres, which is the approximate volume of the smaller FR2 pool.
  
  Section::::Volume.:Royal Albert Hall.
   Section::::In governments.:Isomorphic mimicry.
   Only extant completed artificial swimming pools larger than for which reliable size sourcing information is available are listed, sorted by surface area. Depth and volume are not taken into account. Note that this list may not be comprehensive as large swimming pools for which no reliable sources exist attesting to their size are not included.
   At events in streets or a park rather than an enclosed venue, crowd counting is more difficult and less precise. For many events, especially political rallies or protests, the number of people in a crowd carries political significance and count results are controversial. For example, the global protests against the Iraq war had many protests with widely differing counts offered by organizers on one side and the police on the other side. Another memorable incident occurred when Louis Farrakhan threatened to sue the Washington, D.C. Park Police for announcing that only 400,000 people attended the 1995 Million Man March he organized. The National Park Police still estimates crowd size for its own planning purposes, but does not publicly reveal the figures.
  