Sound Decibel Converter
Convert decibels to pressure, intensity, and power ratios with hearing safety information
Sound Pressure & Intensity
Sound Pressure
0.02 Pa
2.00e+4 µPa
Intensity
1.00e-6 W/m²
Intensity Ratio
1.00e+6x
vs 10⊃-12 W/m²
Hearing Safety
At 60 dB
Safe for extended periods
Distance & Combining Sources
At 2x Distance
54 dB
-6 dB
At 10x Distance
40 dB
-20 dB
2 Identical Sources
63 dB
+3 dB
10 Identical Sources
70 dB
+10 dB
Ratios
Power Ratio
1.00e+6x
10^(dB/10)
Voltage/Pressure Ratio
1.00e+3x
10^(dB/20)
Perceived Loudness
1x
vs 60 dB
Common Sound Levels
Understanding Decibels
Logarithmic scale: Every 10 dB increase represents 10x more sound intensity and roughly 2x perceived loudness.
+3 dB = 2x power: Combining two identical sound sources adds only 3 dB, not double.
-6 dB per doubling: Sound level drops 6 dB each time you double the distance from the source.
Reference: 0 dB SPL = 20 micropascals (threshold of human hearing at 1 kHz).