Decibel Calculator

The decibel is a logarithmic unit used to describe the ratio of a signal level (power, intensity, or amplitude) to a reference level.

Signal Level (S or A)

Reference Level (S_ref or A_ref)

Standard sound power ref is 1e-12 W

Decibel Level (L)

-- dB

Formula: L = 10 × log₁₀(S / S_ref)

Decibel Level (L)

Reference Level (S_ref or A_ref)

Absolute Signal Level (S or A)

Formula: S = S_ref × 10^(L / 10)