Sound Pressure Level Calculator

Calculate SPL in dB from acoustic pressure

Sound Pressure (Pascals)

Reference Pressure (Pa) Standard: 20 μPa (threshold of hearing)

SPL Reference Levels

0 dB SPL - Threshold of hearing
40 dB SPL - Quiet library
60 dB SPL - Normal conversation
85 dB SPL - Heavy traffic
120 dB SPL - Threshold of pain