basic

Sound Intensity Decibel Calculator

β = 10 · log₁₀(I / I₀).

Compute the sound intensity level in decibels from a measured intensity and a reference intensity (I₀ = 10⁻¹² W/m² is the reference at the threshold of human hearing).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

W/m²
W/m²

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

β = 10 · log₁₀(I / I₀), I₀ = 1 × 10⁻¹² W/m².

In depth

Compute the sound intensity level in decibels from a measured intensity and a reference intensity (I₀ = 10⁻¹² W/m² is the reference at the threshold of human hearing).