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Pressure from SPL Calculator

Compute pressure p = p₀·10^(SPL/20) from a sound pressure level.

Input Data

Input SPL.
dB

Results

0.632456Pa
p = p₀·10^(SPL/20), p₀=20 µPa.

At a glance:Pressure from SPL Calculator: enter parameters to compute results; complements related calculators.

Formula

p = p₀·10^(SPL/20), p₀ = 2×10⁻⁵ Pa (20 µPa).

How to Use

  1. Enter SPL (dB).
  2. It returns linear pressure (Pa).

Case Studies

SPL=90 dB → p≈0.632 Pa

p = 2e-5·10^4.5 ≈ 0.63246 Pa.

FAQ

Why 20 not 10?

Pressure scales with amplitude (squared energy), so level uses 20·log₁₀.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Pressure from SPL Calculator/acoustics/pressure-from-spl)。