Calculate g-force from speed and time, gravitational acceleration from mass and distance, or centrifuge RCF from rotor radius and RPM.

Signed velocities along one axis; result is average acceleration in g.

G Force Formula

The following equation is used to calculate the g-force of a rotating object or body.

G ≈ .001118 × R × RPM²
  • Where G is the G-Force
  • R is the radius of the rotation (meters)
  • RPM is the rotations per minute

For circular motion, square the rotations per minute and multiply by approximately .001118 times the radius in meters.

G Force Definition

For circular motion, g-force is radial acceleration expressed relative to standard gravity. For example, 2 g means a radial acceleration of 2 × 9.80665 m/s².

G Force Example

How to calculate G Force?

  1. First, determine the radius of rotation.

    Measure the radius of rotation of the object.

  2. Next, determine the RPM.

    Calculate or measure the total number of rotations per minute.

  3. Finally, calculate the G Force.

    Calculate the G Force using the equation above.

FAQ

What is G Force?

G force, in the case of the above calculator, is a relative force acting on a rotating object.

Why is g force relative?

G force is relative because it’s a force compared to the force of gravity of Earth. For example, 2G’s of g-force is equal to twice the gravitational force of Earth.