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Calcimator

Fire Alarm Coverage Calculator

Calculate detector count and spacing per NFPA 72 for smoke and heat detectors.

Inputs

Results

Detectors Required

3

Adjusted Spacing (ft)

30

Coverage per Detector (sq ft)900
Height Adjustment Factor1
Estimated Total Cost$360
Cost per Sq Ft$0.18
Base Spacing30
How to Use This Calculator
  1. Enter Room Area (sq ft), Ceiling Height (ft), and Ceiling Type.
  2. Set Detector Type.
  3. Review Detectors Required and Adjusted Spacing (ft).
  4. Use Coverage per Detector (sq ft) and Height Adjustment Factor to inform your decision.
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