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Signal-to-noise ratio (SNR) calculator
Enter signal and noise power to calculate SNR and its equivalent in dB.
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Frequently asked questions
What is SNR's formula?
SNR = Psignal/Pnoise.
How is it expressed in dB?
SNRdB = 10 log₁₀(SNR).
Is a higher SNR better?
In general, a higher signal-to-noise ratio means the signal stands out more from the noise.
What units should the powers have?
Same units for both.