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
- Enter SPL (dB).
- 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.