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`"SNR" = 20log_10( S / N )`

Enter a value for all fields

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**) Signal strength - (
**N**) Noise Level

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

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**Cable Loss Budget**: This calculator computes the allowable loss budget in a fiber optic cable run based on the line loss rate, length of the run, signal loss per connector and splice.**dB Loss Calc**: This calculator computes the dB loss over a transmission.

When signals are a measure of amplitude, in measures such as volts (V) or amperes (A), the formula for Signal to Noise Ratio is:

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

where:

- SNR = Signal to Noise Ratio
- S = Signal Strength
- N= Noise Level

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.