Convert
Pick a model to see the maker's own speed and g-force limits beside your result.
Tools
RCF and RPM calculator
Convert a protocol's g-force to the speed your centrifuge shows, or turn a speed into g-force.
Free tool · no signup
The formula
RCF = 1.118 × 10⁻⁵ × r × rpm², where r is the rotor radius in centimeters, measured from the center of the rotor to the bottom of the tube.
Force rises with the square of the speed. Doubling the rpm gives four times the g-force.