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SNR Calculator

Compute SNR = 10·log₁₀(P_s/P_n) in decibels.

Input Data

Input Signal power Pₛ.
W
Input Noise power Pₙ.
W

Results

10dB
SNR = 10·log₁₀(Pₛ/Pₙ).

At a glance:SNR Calculator: enter parameters to compute results; complements related calculators.

Formula

SNR(dB) = 10 · log₁₀(Pₛ / Pₙ).

How to Use

  1. Enter Pₛ, Pₙ.
  2. It returns SNR (dB).

Case Studies

Ps=10, Pn=1 → 10 dB

10× power is 10 dB.

FAQ

Voltage form?

With voltages (equal impedance): SNR = 20·log₁₀(Vₛ/Vₙ).

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:SNR Calculator（/signal/snr-db）。