Certain procedures necessitate precise centrifugation conditions, which must be specified in terms of relative centrifugal
force (RCF) expressed in units of gravity (times gravity or × g). Many microcentrifuges only have settings for speed
(revolutions per minute, RPM), not relative centrifugal force. Consequently, a formula for conversion is required to ensure
that the appropriate setting is used in an experiment. The relationship between RPM and RCF is as follows:
g = (1.118 × 10-5) R S2