Fire Sprinkler Design Calculator

Calculate sprinkler head count, spacing, design density, and pipe sizing per NFPA 13.

Hazard Classification

Protected Area (sq ft)

Ceiling Height (ft)

Tab to move between fields

Sprinkler Heads Required

Total Design Flow (GPM)

750

Design Density (gpm/sq ft)0.15

Max Head Spacing (ft)15

Recommended Pipe Size (in)3

Remote Design Area (sq ft)1,500

Remote Area Flow (GPM)225

How to Use This Calculator

Enter Hazard Classification, Protected Area (sq ft), and Ceiling Height (ft).
Review Sprinkler Heads Required and Total Design Flow (GPM).
Use Design Density (gpm/sq ft) and Max Head Spacing (ft) to inform your decision.

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