Sound Level Converter
Convert between sound level units including decibels, bels, and nepers.
60 dB =
6
Bel (B)
60 dB in all units
Decibel (dB)60
Bel (B)6
Neper (Np)6.907755
Common Sound Levels
Threshold of hearing0 dB
Whisper, quiet library30 dB
Normal conversation60 dB
Heavy traffic, loud restaurant85 dB
Motorcycle, power tools100 dB
Rock concert, thunder120 dB
Jet engine at 30m140 dB
Quick Reference
1 Bel
= 10 dB
1 Neper
= 8.686 dB
+10 dB
= 10x power
+3 dB
= 2x power
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
📚
Formula Source: NIST Guide to SI Units
by National Institute of Standards
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.