Centrifuge Calculator

Convert centrifuge RPM to relative centrifugal force (RCF).

Relative centrifugal force (× g) 1,788.8

Formula: RCF = 1.118 × 10⁻⁵ · r · rpm²

Step-by-step with your numbers:

1. Values used:

2. Rotor radius = 10

3. Speed = 4,000 rpm

5. Relative centrifugal force = 1,788.8× g

Did we solve your problem today?

RCF expresses a centrifuge's force as a multiple of gravity, independent of rotor size.

The math behind it

RCF = 1.118 × 10⁻⁵ · r(cm) · rpm². Always report RCF, since the same rpm gives different force at different radii.

10 cm radius at 4000 rpm → about 1789 × g.

Why use RCF instead of rpm?

RCF is reproducible across centrifuges with different rotor sizes.