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

**Formula**

**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.