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# Signal-to-Noise Ratio(dB)

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Equation / Last modified by KurtHeckman on 2017/08/01 15:26
`"SNR" = `

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ID

vCalc.Signal-to-Noise Ratio(dB)

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bd31e316-0d7a-11e4-b7aa-bc764e2038f2

The **Signal-to-Noise Ratio (SNR)** calculator computes a relative measure of the strength of the received signal (i.e., the information being transmitted) compared to the noise.

**INSTRUCTIONS:** Enter the following. SNR = 20 * log_{10}(S/N)

- (
**S**) This is the signal strength in dB - (
**N**) This is the noise strength in dB

**SNR:** The calculator returns the SNR in dB.

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#### The Math / Science

The formula employed in this SNR calculator is as follows:

SNR = 20 * log_{10}(S/N)

The SNR is typically measured in units of decibels (dB), a unit of measure that some think is used by electrical engineers primarily to confuse computer scientists. The SNR, measured in dB, is twenty times the ratio of the base-10 logarithm of the amplitude of the received signal to the amplitude of the noise.