ppm to Hz Calculator

This tool converts from crystal oscillator stability in terms of parts per million (ppm) to the equivalent frequency variation (Hz/kHz/MHz/GHz)

arrow Hz to PPM

Formula

The frequency variation df on either side of the center frequency F is given by

df = F*ppm*10-6

The maximum and minimum frequency are given by

Fmax = F + df

Fmin = F – df

Example

The 32 MHz oscillator has a frequency stability of +/- 25 PPM.

The oscillator can be used as a reference clock with a phase locked loop to generate a frequency of 1 GHz.

Enter these numbers into the calculator above to calculate a frequency variation of +/- 25 kHz. The minimum and maximum frequencies generated are 999.975 MHz and 1000.025 MHz, respectively.