Centrifuge RCF and RPM worksheet
Mistake: Treating a computed RPM as an equipment safety limit.
Fix: Check the rotor, tube, bucket and instrument limits separately before use.
Calculators · Free
Centrifuge RCF and RPM worksheet
Convert a documented centrifugation setting using the actual rotor radius.
01Enter your values
Runs in your browserRuns offline in your browser. Once the page and required files have loaded, processing needs no internet.
02Centrifuge RCF and RPM worksheet
Runs in your browser
How it works
Convert a documented centrifugation setting using the actual rotor radius.
RCF = 1.118 × 10⁻⁵ × r(cm) × RPM²
Use the documented radius for the actual rotor, tube and adapter. Minimum, average and maximum radii are not interchangeable. This conversion does not establish a sample protocol, safe operating speed, balance or equipment compatibility. Manufacturer limits still apply. Calculation works offline after loading.
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Convert a documented centrifugation setting using the actual rotor radius.
RCF = 1.118 × 10^-5 × radius in cm × RPM². For the inverse, RPM = sqrt(RCF / (1.118 × 10^-5 × radius)). The radius is converted from the selected length unit before calculation.
How to use it
- Enter your values
Rotor radius · Known setting · Setting value
- Calculate / generate
Convert a documented centrifugation setting using the actual rotor radius.
- Result
Rotation speed: 3,000 RPM Relative centrifugal force: 1,006.2 ×g
Calculation method
- RCF = 1.118 × 10^-5 × radius in cm × RPM².
- For the inverse, RPM = sqrt(RCF / (1.118 × 10^-5 × radius)).
- The radius is converted from the selected length unit before calculation.
RCF = 1.118 × 10⁻⁵ × r(cm) × RPM²
Centrifuge RCF and RPM worksheet
- Rotor radius
- 10 cm
- Known setting
- RPM → RCF
- Setting value
- 3000
Result
Rotation speed: 3,000 RPM Relative centrifugal force: 1,006.2 ×g
Frequently asked questions
What does this result assume?
Use the documented radius for the actual rotor, tube and adapter. Minimum, average and maximum radii are not interchangeable. This conversion does not establish a sample protocol, safe operating speed, balance or equipment compatibility. Manufacturer limits still apply. Calculation works offline after loading.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.
Terms and definitions
Enter your values
- Measurement system
The initial choice follows your browser region. Your choice is remembered on this device. Gallons are US gallons. Switching units keeps your numbers unchanged and interprets them in the new unit.
Numbers stay unchanged. Check the new unit and enter the intended measurement, or select an example for that system.
- Rotor radius
Distance from the axis to the chosen documented sample position; use one consistent radius basis.
Enter a numerical value for this quantity. Use the unit shown beside this field. cm / in
Minimum: 1e-12 · Maximum: 1000000 cm
- Known setting
Choose whether the entered setting is RPM or relative centrifugal force.
Choose the mode that matches the data you entered.
Options: RPM → RCF · RCF → RPM
- Setting value
Nonnegative RPM or multiples of g, as selected above.
Enter a numerical value for this quantity.
Minimum: 0 · Maximum: 1000000000000
Result
- Result
RCF = 1.118 × 10^-5 × radius in cm × RPM². For the inverse, RPM = sqrt(RCF / (1.118 × 10^-5 × radius)). The radius is converted from the selected length unit before calculation.
Calculated from your entries using the method below.
- Rotation speed
Rotation rate in revolutions per minute corresponding to the supplied radius.
Calculated from your entries using the method below.
- Relative centrifugal force
Centrifugal acceleration divided by standard gravitational acceleration; not grams of mass.
Calculated from your entries using the method below.
- Value
RCF = 1.118 × 10^-5 × radius in cm × RPM². For the inverse, RPM = sqrt(RCF / (1.118 × 10^-5 × radius)). The radius is converted from the selected length unit before calculation.
Calculated from your entries using the method below.
- Unit
The radius is converted from the selected length unit before calculation.
Calculated from your entries using the method below.
Common mistakes and quick fixes
Limits and key assumptions
- Use the documented radius for the actual rotor, tube and adapter. Minimum, average and maximum radii are not interchangeable. This conversion does not establish a sample protocol, safe operating speed, balance or equipment compatibility. Manufacturer limits still apply. Calculation works offline after loading.
- Displayed results may be rounded; rounding does not add measurement precision.