Emergency Voice System Calculator

Speaker placement and wattage for fire alarm voice systems.

Floor area per story (sq ft)

Ceiling height (ft)

Ambient noise level (dBA)

Number of floors

Speaker type

Include strobes

Tab to move between fields

Total speakers

Speakers per floor2

Speaker spacing (ft)50

Required sound level (dBA)75

Total speaker wattage (W)150

Amplifier capacity (W)180

Amplifier units1

Total strobes9

NAC circuits3

How to Use This Calculator

Enter Floor area per story (sq ft), Ceiling height (ft), and Ambient noise level (dBA).
Set Number of floors, Speaker type, and Include strobes.
Review the Total speakers result.
Use Speakers per floor and Speaker spacing (ft) to inform your decision.

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