ADC Quantization Noise

Every digital recording is a staircase approximation of a smooth wave. See how bit depth sets the step size — and the noise floor.

ADC Quantization NoiseLive

how many bits is enough?

Controls

Presets

Resolution (bits)

Signal frequency

An analog-to-digital converter rounds each sample to the nearest of 2ᴺ levels, adding quantization noise. Each extra bit halves the step size and adds about 6 dB of signal-to-noise ratio — the famous 6.02N + 1.76 dB rule. Educational tool.

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Data Inspector

Levels8

Ideal SNR19.8 dB

Step size0.2500

Governing equation

SNR = 6.02 N + 1.76 = 19.8 dB, Δ = \frac{F S}{2 ^{3}} = 0.2500, \overline{n^{2}} = \frac{Δ ^{2}}{12} = 5.21 e - 3

Reading this result: Each extra bit halves the step size and adds about 6 dB; 3 bits gives 8 levels and roughly 19.8 dB of SNR.

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How it works

An analog-to-digital converter rounds each sample to one of 2ᴺ levels, injecting quantization noise. Each additional bit halves the step size and raises the signal-to-noise ratio by about 6 dB, giving the classic SNR ≈ 6.02N + 1.76 dB. Educational tool.

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Frequently asked questions

Is this adc quantization snr tool really free?▾

Yes. ADC Quantization Noise runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.

Do I need to install anything?▾

No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.

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Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.

How accurate are the results?▾

The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.