Enter the displacement, frequency, and time into the calculator to determine the vibration g forces.

Vibration G Force Formula

The following equation is used to calculate the G forces from vibration.

GF = (2*pi*f)^2*D*sin(2*pi*f*t) / 9.81

  • Where GF is the number of g forces
  • f is the frequency (hz = 1/s)
  • D is the displacement (m)
  • t is the time (s)

What is a Vibration G Force?


Vibration G-Force is a measurement for the number of times the vibration level of a piece of equipment exceeds the equipment’s own weight.

How to Calculate Vibration G Force?

Example Problem:

The following example outlines the steps and information needed to calculate g forces from virbation.

First, determine the frequency. In this example, the frequency is found to be 400 hz.

Next, determine the displacement. In this case, the instantaneous displacement is 1.25m.

Next, determine the time. The time for this example is 5s.

Finally, calculate the vibration g forces using the formula above:

GF = (2*pi*f)^2*D*sin(2*pi*f*t) / 9.81

GF = (2*3.14159*400)^2*1.25*sin(2*3.14159*400*5) / 9.81

GF = 8542.09 Gs