Evacuation Time Calculator

Calculate building evacuation time based on occupancy and exit capacity.

Maximum number of people in the building at one time.
people
Total number of usable exit doors for evacuation.
exits
Average clear width of each exit door in inches.
inches
Total stories in the building. Adds stairwell travel time.
floors
Percentage of occupants with reduced mobility (reduces flow rate).
%

Results

Evacuation Time:
Estimated total time for full building evacuation.
-minutes
Bottleneck Capacity:
Maximum persons per minute through all exits combined.
-persons/min
Code Compliance:
Whether exit capacity meets IBC code requirements (0.2 inches per occupant).
-
Stairwell Delay:
Additional time added for multi-floor stairwell travel.
-minutes
Reference: IBC/NFPA 101 Life Safety Code. Flow rate: 24 persons/min per 22-inch unit of exit width.