# Power Spectral Density PSD Calculator

The PSD can be computed by taking the ratio of the signal power to bandwidth.

To compute the Power spectral density, enter

• Signal power Ps in either Watt/Milliwatt/Microwatt/Nanowatt OR dBm
• Bandwidth BW in GHz/MHz/kHz/Hz

PSD = Ps/BW

## Example Calculation

A total power of 10 Watt across bandwidth of 1 kHz results in a PSD of 0.01 W/Hz or 10 dBm/Hz.

## Related Calculators

This calculator can be used to determine the noise power spectral density.

SNR (in dB) is the difference between the PSD and the noise density.