Emergency Lighting Calculator — Free Online Calculator
Calculate the number of emergency and exit lights needed per building code requirements.
How to Use This Calculator
Enter floor area, number of exits, and corridor length.
The Formula Explained
Exit signs required at each exit plus every 75 feet of corridor. Emergency lights: 1 per 1000 sq ft open area plus 1 per 50 feet of corridor. All units must provide 90 minutes of battery backup per NFPA 101.