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

Convert

Pick a model to see the maker's own speed and g-force limits beside your result.

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.

Measure r to the bottom of the tube, not the middle; at double the speed the force is four times as high. Open the printable diagram

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.

No. G-force rises with the square of the speed, so doubling the rpm gives four times the g-force.

Compatibility details come from manufacturers' published documentation and can change. Confirm fit in your model's current manual before use.