Refugee Camp Population Calculator
Estimate refugee camp population capacity from site area, shelter type, and services. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer
Refugee Camp Population Calculator
Calculator
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Formula: Capacity = min(Usable Area / 45 m2, Number of Shelters x Persons per Shelter)
Worked example — Recommended capacity: 2,000 people | 2,000 shelters | 40,000 L water/day | 100 latrines
Formula
Capacity = min(Usable Area / 45 m2, Number of Shelters x Persons per Shelter)
Camp capacity is determined by the more restrictive of two constraints: the UNHCR minimum of 45 square meters per person for overall site planning, and the number of shelter units that fit in the usable area multiplied by occupants per shelter.
Worked Examples
Example 1: Medium-Sized Camp Planning
Problem:A 15-hectare site with 60% usable area using family tents (5 persons per tent). Estimate capacity and services.
Solution:Total area: 15 ha = 150,000 m2 Usable area: 150,000 x 0.60 = 90,000 m2 Max by area (45 m2/person): 90,000 / 45 = 2,000 people Shelters (45 m2 plot): 90,000 / 45 = 2,000 tents Capacity by shelters: 2,000 x 5 = 10,000 Recommended capacity: min(2,000, 10,000) = 2,000 Water: 2,000 x 20 = 40,000 L/day Latrines: 2,000 / 20 = 100
Result:Recommended capacity: 2,000 people | 2,000 shelters | 40,000 L water/day | 100 latrines
Example 2: Emergency Camp with Minimal Shelters
Problem:A 5-hectare site with 50% usable area using emergency shelters for 6 persons each.
Solution:Total area: 5 ha = 50,000 m2 Usable area: 50,000 x 0.50 = 25,000 m2 Max by area: 25,000 / 45 = 555 people Shelters (30 m2 plot): 25,000 / 30 = 833 Capacity by shelters: 833 x 6 = 4,998 Recommended: min(555, 4,998) = 555 Latrines: 555 / 20 = 28
Result:Recommended capacity: 555 people | 833 shelters | 11,100 L water/day | 28 latrines
Frequently Asked Questions
What is the minimum area per person recommended for refugee camps?
The UNHCR Handbook for Emergencies recommends a minimum of 45 square meters per person for the overall camp site, which includes shelter space, communal areas, roads, firebreaks, and service facilities. The Sphere Standards specify a minimum covered floor area of 3.5 square meters per person for the shelter itself. These standards are designed to ensure adequate living conditions, prevent disease outbreaks, reduce fire risk, and maintain human dignity. In emergency situations the initial response may temporarily fall below these standards, but planners should aim to meet or exceed them as quickly as possible to avoid overcrowding-related health and safety problems.
How is the usable area of a camp site determined?
The usable area of a refugee camp site is the portion of land that can actually be used for shelter plots and associated facilities after accounting for terrain constraints. Typically only 50 to 70 percent of a site is usable for shelters. The remaining area is allocated to community facilities such as health centers schools and distribution points, roads and pathways for vehicle and pedestrian access, firebreaks which are mandatory open spaces to prevent fire spread between blocks, administrative areas for camp management, water and sanitation infrastructure including boreholes latrines and drainage, and buffer zones along the camp perimeter for security and environmental protection.
What are the water supply standards for refugee camps?
The Sphere Humanitarian Standards specify a minimum of 15 to 20 liters of water per person per day for drinking cooking and personal hygiene in camp settings. This is considered a survival-level provision. Ideally camps should provide at least 20 liters per person per day with water points located no more than 200 meters from any shelter. Additional water is needed for health facilities at 40 to 60 liters per patient per day, feeding centers at 20 to 30 liters per patient per day, and livestock if present. Water distribution points should serve no more than 250 people each, and queuing time should not exceed 30 minutes.
How are sanitation facilities calculated for a refugee camp?
The Sphere Standards recommend a maximum of 20 people per latrine in the initial emergency phase with a long-term target of one latrine per family or household. Latrines should be located no more than 50 meters from shelters but at least 30 meters from water sources to prevent contamination. Separate facilities should be provided for men and women with a recommended ratio of three female latrines for every one male latrine. Solid waste disposal requires at least 100 liters of refuse pit space per person per year. Drainage systems must handle both grey water from washing and stormwater runoff to prevent standing water which breeds mosquitoes and spreads disease.
What types of shelter are commonly used in refugee camps?
The most common shelter types in refugee camps include standard UNHCR family tents which measure approximately 17.5 square meters and are designed for a family of five to six people as an initial emergency response. Transitional shelters are semi-permanent structures made from local materials with improved roofing and can last two to three years. Prefabricated units are factory-made structures that offer better insulation and durability but cost significantly more and require transportation logistics. Emergency shelters are the most basic option using tarpaulins and basic framing for immediate protection. The choice depends on the expected duration of displacement, climate conditions, available budget, and local construction materials and practices.
How do population growth models work?
Exponential growth follows dN/dt = rN, producing a J-shaped curve with unlimited resources. Logistic growth follows dN/dt = rN(K-N)/K, producing an S-shaped curve that levels off at carrying capacity (K). Real populations typically follow logistic growth with fluctuations around K.
References
Reviewed for accuracy by Daniel Agrici, Founder & Lead Developer · Editorial policy
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