Pepkio Tools

RCF ↔ RPM Rotor Converter

Convert RPM and ×g with rotor lookup, tri-radius output, protocol transfer, and copy-ready methods text.

What it does

Enter RPM or ×g and search for your rotor model—or type rmin, ravg, and rmax manually if it is not listed. Results update as you type: all three g-force values at once, with ravg highlighted, plus a tube diagram showing force from top to bottom. The tool warns when RPM exceeds the rotor's rated maximum.

Copy individual ×g values or a manuscript-ready methods sentence with rotor name, duration, and temperature. Protocol Transfer maps source RPM on one rotor to the matching RPM on a different rotor and flags fixed-angle versus swing-bucket mismatches. Paste multi-step spin protocols as CSV in Batch mode, download results, reload recent runs from history, or print a record—no install or account.

Why researchers use it

  • Avoid copying RPM without rotor geometry correction
  • See rmin, ravg, and rmax g-force in one view
  • Catch over-speed before running a rotor
  • Transfer published spin steps to your centrifuge
  • Paste methods-ready ×g text into manuscripts

Best for

  • Converting protocol RPM to ×g for papers
  • Pelleting cells or bacteria at matched force
  • Density gradient centrifugation planning
  • Moving methods between shared centrifuges
  • Multi-step spin protocols in batch CSV
  • Core facility rotor cross-reference

What makes it different

ScienceGateway and Endmemo cover a few Beckman and Eppendorf rotors but lack tri-radius display, safety warnings, and methods text. Eppendorf's calculator is accurate only for its own rotors. ConductScience offers batch CSV and methods output but requires manual radius entry and shows no max-RPM check.

This browser tool combines searchable rotor presets across three manufacturers, simultaneous rmin–rmax output with a force-gradient diagram, max-RPM alerts, protocol transfer between rotors, batch CSV conversion, and copy-ready methods text—in one workspace with live results, no install.

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