Fire Egress Calculator

Calculate exit width, number of exits, and travel distance based on occupant load per IBC.

Floor Area (sq ft)

Occupant load = floor area ÷ load factor (ft²/person)

Occupancy Type

Assembly: 7–15 ft²/person; Business: 100 ft²/person; Educational: 20 ft²/person

Number of Floors

≥500 occupants on any floor: minimum 3 exits; ≥1,000: minimum 4 exits per IBC §1006.3

Sprinkler System

Sprinklered travel distance bonus: +50 ft for most occupancies per IBC Table 1017.2

Tab to move between fields

Occupant Load

100

Minimum Exits Required

Total Stair Width (inches)15

Total Level Exit Width (inches)12

Width per Exit (inches)36

Max Travel Distance (ft)300

Max Common Path (ft)100

How to Use This Calculator

Enter Floor Area (sq ft), Occupancy Type, and Number of Floors.
Set Sprinkler System.
Review Occupant Load and Minimum Exits Required.
Use Total Stair Width (inches) and Total Level Exit Width (inches) to inform your decision.

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Related Calculators

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Calculate fire extinguisher count and spacing by hazard class per NFPA 10.

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