Centrifuge RPM to Relative Centrifugal Force (RCF ×g) Rotor Converter

Apply RCF = 1.118 × 10⁻⁵ × r_mm × RPM² for accurate lab centrifugation.

Relative Centrifugal Force (RCF)
152,942.4 ×g
RPM Required for Target Protocol RCF 3,068.44 RPM
Tangential Rim Speed 119.38 m/s
Rotor Radius in Centimeters 9.5 cm
Inputs
mm
Rotor radius from center spindle to tube bottom in millimeters (mm).
RPM
Centrifuge rotational speed in revolutions per minute (RPM).
×g
Optional protocol RCF target (×g) to solve for required RPM.
Results & Graph
Relative Centrifugal Force (RCF)
152,942.4 ×g
RPM Required for Target Protocol RCF
3,068.44 RPM
Tangential Rim Speed
119.38 m/s
Rotor Radius in Centimeters
9.5 cm

Relative Centrifugal Force (RCF)

Graph 1 • Rotor Radius Mm Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 ×g 123.9k ×g 247.8k ×g 50%: 76,471.2 ×g 76.5k 50% 75%: 114,706.8 ×g 114.7k 75% 100%: 152,942.4 ×g 152.9k 100% 125%: 191,178 ×g 191.2k 125% 150%: 229,413.6 ×g 229.4k 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
Relative Centrifugal Force (RCF) 152,942.4 ×g RPM Required for Target Protocol RCF 3,068.44 RPM Tangential Rim Speed 119.38 m/s Rotor Radius in Centimeters 9.5 cm
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
Relative Centrifugal Force (RCF)152,942.4 ×gRPM Required for Target Protocol RCF3,068.44 RPMTangential Rim Speed119.38 m/sRotor Radius in Centimeters9.5 cm
Summary: At 12,000 RPM on a 95 mm radius rotor, RCF is 152,942 ×g (to reach 10,000 ×g, spin at 3,068 RPM).
Summary: At 12,000 RPM on a 95 mm radius rotor, RCF is 152,942 ×g (to reach 10,000 ×g, spin at 3,068 RPM).
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Formula & Mathematical Methodology: Centrifuge RPM ↔ RCF Reference Equation

RCF (×g) = 1.118 × 10⁻⁵ × Radiusmm × RPM²
RPM = RCF / (1.118 × 10⁻⁵ × Radiusmm)
RCF (×g) = 1.118 × 10⁻⁵ × Radius_mm × RPM²; RPM = √[ RCF / (1.118 × 10⁻⁵ × Radius_mm) ]
  • rotorRadiusMm: Rotor Radius Mm (mm)
  • speedRpm: Speed Rpm (RPM)
  • targetProtocolRcfG: Target Protocol Rcf G (×g)

Rounding: Laboratory and clinical equations retain full floating-point precision and round displayed results to 2 decimal places.

Worked Example: Reference Calculation: Centrifuge RPM ↔ RCF

Apply RCF = 1.118 × 10⁻⁵ × r_mm × RPM² for accurate lab centrifugation.

  1. Enter the reagent concentrations, assay readings, or clinical laboratory parameters.
  2. Compute the standard formula: RCF (×g) = 1.118 × 10⁻⁵ × Radius_mm × RPM²; RPM = √[ RCF / (1.118 × 10⁻⁵ × Radius_mm) ].
  3. Review the primary result, supporting reference intervals, and 3 SVG visualizations.
Result: Evaluates Centrifuge RPM ↔ RCF via RCF (×g) = 1.118 × 10⁻⁵ × Radius_mm × RPM²; RPM = √[ RCF / (1.118 × 10⁻⁵ × Radius_mm) ].

Frequently Asked Questions

What formula is used by the Centrifuge RPM to Relative Centrifugal Force (RCF ×g) Rotor Converter?

It computes RCF (×g) = 1.118 × 10⁻⁵ × Radius_mm × RPM²; RPM = √[ RCF / (1.118 × 10⁻⁵ × Radius_mm) ] and plots three custom SVG graphs showing parameter sensitivity and component breakdowns.

Can I compare different reagent dilutions or lab scenarios side by side?

Yes. Use the "Compare (0/3)" button to pin up to 3 scenarios side by side.

Are entered values stored on any server?

No. Every calculation runs 100% locally in your browser.

Science & Engineering · Analytical Chemistry & Lab Bench

Centrifuge RPM to Relative Centrifugal Force (RCF ×g) Rotor Converter: inputs, method, and how to read the result

Apply RCF = 1.118 × 10⁻⁵ × r_mm × RPM² for accurate lab centrifugation.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Rotor Radius Mm: Rotor radius from center spindle to tube bottom in millimeters (mm).
  • Speed Rpm: Centrifuge rotational speed in revolutions per minute (RPM).
  • Target Protocol Rcf G: Optional protocol RCF target (×g) to solve for required RPM.

What the calculation includes

With the default values shown, Relative Centrifugal Force (RCF) is 152,942.4 ×g. The calculation follows Centrifuge RPM ↔ RCF Reference Equation; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Rotor Radius Mm from 95 mm to 105 mm changes Relative Centrifugal Force (RCF) from 152,942.4 ×g to 169,041.6 ×g. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses standard IUPAC atomic weights, 25°C (298.15 K) reference thermodynamics, and published clinical literature equations.
  • Educational and laboratory reference tool only; clinical scoring calculators do not replace professional medical judgment or institutional protocols.

Scope: IUPAC / NIH Laboratory & Clinical Reference Standard Check the assumptions and limitations against your situation before relying on the estimate.

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