The Hz to PPM calculator allows you to convert a frequency variation expressed in hertz (Hz) into parts per million (PPM).
This calculation is essential for evaluating the frequency stability of an oscillator, an RF signal or a communications system.
Formula used
PPM = (Δf / f₀) × 10⁶
Or :
Δf = frequency variation (in Hz)
f₀ = central or nominal frequency (in Hz)
PPM = deviation in parts per million
Explanation
The formula calculates the relative offset between the actual frequency and the nominal frequency of a signal.
A PPM value indicates how many parts in a million the frequency deviates from the reference value.
The lower the PPM, the higher the frequency stability.
This calculation is often used to characterize crystal oscillators, RF generators and timing systems.
Calculation example
Let us assume a nominal frequency f₀ of 10 MHz and a variation Δf of 50 Hz :
PPM = (50 / 10,000,000) × 10⁶ = 5 PPM
This means that the frequency varies by 5 parts in a million from its nominal value.
Benefits and Use
- Used to evaluate the stability and precision of RF oscillators and clocks.
- Facilitates comparison between different frequency sources.
- Useful for calibration and quality control of electronic equipment.
- Essential in telecommunications, GPS and signal measurement applications.
