सेंट्रीफ्यूज जी-फोर्स (आरसीएफ) कैलकुलेटर

RCF is the effective force on the sample in a centrifuge, expressed as multiples of gravitational acceleration (×g). RCF = 1.118 × 10⁻⁶ × n² × R, where n is RPM and R is rotor radius in mm. Unlike RPM alone, RCF accounts for rotor size, making results comparable across centrifuges.

RPM alone doesn't specify the actual force on the sample — it depends on rotor radius. Two centrifuges at the same RPM but different rotor sizes produce different g-forces. Always report RCF (×g) in scientific protocols for reproducible results.

Use the maximum radius (r_max) — the distance from the rotation axis to the bottom of the sample tube. This gives the maximum g-force experienced by the sample. Some sedimentation protocols specify r_avg (average radius).

Typical ranges:

• Benchtop micro: up to 20,000 ×g
• General lab: 3,000–15,000 ×g
• High-speed: 25,000–100,000 ×g
• Ultracentrifuge: up to 1,000,000 ×g
• Industrial separators: 1,000–10,000 ×g

Use the reverse formula: n = √(RCF / (1.118 × 10⁻⁶ × R)), where RCF is the desired g-force and R is rotor radius in mm. Use the "RCF → RPM" mode toggle at the top of this calculator for automatic conversion.