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Sound Converter
Live
Reference: 20 μPa (threshold of hearing in air, ISO 1683)
Pa → dB SPL
dB SPL
60 dB
dB SPL → Pa
Pascal (Pa)
0.02 Pa
Millipascal (mPa)
20 mPa
Micropascal (μPa)
2.000e+4 μPa
psi
2.9008e-6 psi
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A 4-mode acoustic converter. SPL mode: Pa, mPa, μPa, psi ↔ dB SPL (ref 20 μPa, ISO 1683). SIL mode: W/m², mW/m², μW/m², pW/m² ↔ dB SIL (ref 1 pW/m²). SWL mode: watts ↔ dB SWL (ref 1 pW, ISO 3744). Level Ratios: dB ↔ bel ↔ centibel ↔ neper (1 Np = 8.686 dB). Includes SPL reference table from 0 dB (threshold of hearing) to 150 dB (near jet engine). 100% browser-based.
How to Use
- 1Select a tab: Sound Pressure Level (SPL), Sound Intensity Level (SIL), Sound Power Level (SWL), or Level Ratios
- 2SPL tab: enter Pa in the left field to see dB SPL, or enter dB SPL in the right field to see Pa, mPa, μPa, psi
- 3SIL tab: enter W/m² to see dB SIL, or enter dB SIL to see intensity in W/m², mW/m², μW/m², pW/m²
- 4SWL tab: enter watts to see dB SWL, or enter dB SWL to see power in W, mW, μW, pW
- 5Level Ratios tab: select a unit (dB, Bel, Centibel, or Neper), enter a value, and see all four equivalents
- 6Click any copy button to copy a result to your clipboard
- 7Open 'Common sound pressure levels' for a reference table from 0 dB to 150 dB SPL
Features
- 4 tabs: Sound Pressure Level (SPL), Sound Intensity Level (SIL), Sound Power Level (SWL), Level Ratios
- SPL: Pa ↔ dB SPL using 20 μPa reference (ISO 1683)
- SIL: W/m² ↔ dB SIL using 1 pW/m² reference
- SWL: watts ↔ dB SWL using 1 pW reference (ISO 3744)
- Level Ratios: dB ↔ bel ↔ centibel ↔ neper (1 Np = 8.686 dB)
- SPL reference table: 0 dB (threshold of hearing) to 150 dB (near jet engine)
- 100% browser-based - all math runs in JavaScript
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