SNR Calculator
Signal-to-Noise Ratio
Calculate signal-to-noise ratio from power, voltage, or dB values. Essential for audio, communications, and signal processing.
Calculator
Formula:
SNR (dB) = 10 × log₁₀(Psignal / Pnoise)
About SNR
SNR: Ratio of signal power to noise power
Higher SNR = Better signal quality
Measured in:
Decibels (dB) or linear ratio
Features
- Power-based calculation
- Voltage-based calculation
- dB conversion
- Multiple units (W, mW, dBm)
- Quality assessment
- Quick examples
- Copy results
Quality Ratings
Excellent: ≥ 40 dB
Very Good: 25-40 dB
Good: 15-25 dB
Fair: 10-15 dB
Poor: 5-10 dB
Very Poor: < 5 dB
Applications
Audio: Recording quality
Communications: Signal clarity
Imaging: Image quality
Sensors: Measurement accuracy
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