// multi-utility computation suite · offline · instant · precise
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build.fire-egress Calculator
Calculates required number of exits and minimum door widths for a building or floor from occupant load and occupancy classification per IBC codes. Egress width is based on 0.2 inches per occupant for doors — this is the first calculation in any fire life-safety review.
Inputs
Occupants
Count of items or occurrences.
Exits
Count of items or occurrences.
Door Width
Horizontal extent perpendicular to the length.
Travel Distance
Separation between two points or total path length. Check that units are consistent throughout the calculation.
Results
evacuation time (min)
The computed duration or time value.
exit capacity (persons)
Sample size or count used in the calculation.
per exit (persons)
Sample size or count used in the calculation.
occupant load
Sample size or count used in the calculation.
travel distance
The computed distance or separation.
IBC max travel
Reference formula or conversion factor shown for context.