Where g is the relative centrifugal force, R is the radius of the rotor in centimeters, and S is the speed of the centrifuge in
revolutions per minute. Values of RCF in units of times gravity (× g) for common microcentrifuge rotor radii appear in the
following conversion table. As an example, centrifugation of a sample at 5,000 RPM in a microcentrifuge that has a rotor
with a radius of 7 cm will deliver a centrifugal force of 1,957 × g.