Rehearsal Room Design Calculator

Design rehearsal spaces with musician spacing, SPL estimation, acoustic treatment, and ventilation requirements.

Inputs

Number of musicians

Instrument type (1-3)

Room area (sq ft)

Ceiling height (ft)

Tab to move between fields

Results

Sq ft per musician

Space adequate (0/1)1

Estimated SPL (dB)102

Hearing protection needed (0/1)1

Treatment needed (sq ft)391

Ventilation (CFM)240

How to Use This Calculator

Enter Number of musicians, Instrument type (1-3), and Room area (sq ft).
Set Ceiling height (ft).
Review the Sq ft per musician result.
Use Space adequate (0/1) and Estimated SPL (dB) to inform your decision.

How the result changes with Number of musicians

Number of musicians	Sq ft per musician
5.9	66.7
18	22.2
33	12.1
45	8.9

What each input means

Number of musicians: Musicians rehearsing together.
Instrument type (1-3): 1 = Acoustic, 2 = Amplified, 3 = Drums + amps.
Room area (sq ft): Floor area of rehearsal room.
Ceiling height (ft): Room ceiling height.

What each result means

Sq ft per musician: Space per player.
Space adequate (0/1): 1 = meets minimum spacing.
Estimated SPL (dB): Expected sound level during rehearsal.
Hearing protection needed (0/1): 1 = SPL exceeds 85 dB.
Treatment needed (sq ft): Acoustic panel area for target RT60.
Ventilation (CFM): Minimum airflow for musicians.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Number of musicians = 8, Instrument type (1-3) = 2, Room area (sq ft) = 400, Ceiling height (ft) = 10 = 4 input(s) provided
Calculate Sq ft per musician
Sq ft per musician
50 = 50
Calculate Space adequate
Space adequate
1 = 1
Calculate Estimated SPL
Estimated SPL = baseSPL + round(10 * log10(musicianCount / 5))
102 = 102

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