How to use the retention factor rf calculator
Find the Rf value of a spot in thin layer or paper chromatography. Enter distance travelled by spot, distance travelled by solvent front in the fields above; the retention factor rf, rf as percentage are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “Rf value”, “retention factor chromatography”, “TLC Rf calculation”, “calculate retention factor rf”, “find retention factor rf”.
Formula
Variables
- ds — Distance travelled by spot (cm)
- df — Distance travelled by solvent front (cm)
Worked example
With distance travelled by spot = 4.2 cm, distance travelled by solvent front = 6.0 cm, the calculator gives retention factor rf ≈ 0.7; rf as percentage ≈ 70 %.
Frequently asked questions
What is the retention factor rf calculator used for?
Find the Rf value of a spot in thin layer or paper chromatography. It helps with questions such as “Rf value”, “retention factor chromatography”, “TLC Rf calculation”.
What is the formula for the retention factor rf calculation?
Retention factor Rf = ds / df. Rf as percentage (%) = [Retention factor Rf] × 100. Here ds is distance travelled by spot (cm), df is distance travelled by solvent front (cm).
What inputs do I need for the retention factor rf calculator?
You need distance travelled by spot in cm, distance travelled by solvent front in cm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the retention factor rf calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the retention factor rf result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.