What's the required sound pressure level (1 metre) of my loudspeaker?

Sound Pressure Level Calculator calculates the sound pressure level in rooms
Please enter decimal separators as "."
Please enter your room size and the required Sound Pressure Level in dB
Height in m: Width in m: Length in m: Required Sound Pressure Level in dB:
Room volume in m3:
Room area in m2:
Choose a loudspeaker with maximum sound pressure level /1m in dB:
further notes:
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Now the question comes up what sound pressure level (in dB) is needed for your room.

Just calculate the required maximum sound pressure level of your speakers according to the required volume:
- 100 dB sound pressure level for moderate volume
- 105 dB sound pressure level for standard volume (desirable for hi-fi)
- 110 dB sound pressure level for high volume (disco)
DIN 15 905 Part 5 says: over a period of two hours a sound pressure level of 99 dB at an average may not be exceeded and may lead to bodily injury.

The following table is a guidance for hi-fi systems

Maximum
sound pressure level (1m)
of your loudspeakers
Room size, where
105 dB are achieved

(m2 at 2,5 m ceiling height)
Recommended room size
in m2
100 dB - 4-8
101 dB - 4-10
102 dB - 6-12
103 dB - 6-14
104 dB - 6-16
105 dB - 6-20
106 dB 5 8-20
107 dB 8 10-22
108 dB 10 10-25
109 dB 12 12-30
110 dB 16 16-35
111 dB 20 20-40
112 dB 25 25-50
113 dB 33 30-60
114 dB 42 33-65
  at 3 m ceiling height
115 dB 45 35-70
116 dB 55 40-75
  at 3,5 m ceiling height
117 dB 61 50-90
118 dB 77 60-100
119 dB 104 70-120
120 dB 124 80-140
  at 4 m ceiling height
121 dB 135 90-150
122 dB 175 100-180

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