What is RSI?

The RSI is equivalent to the R value but expressed in the International System: Resistance System International.

It is easy to find sites offering an opportunity to convert one to the other, but here are the factors to be used to do it yourself, and an example calculation:

R to RSI: 0.1761
RSI to R: 5.6782

R Conversion factor RSI
30 0.1761 5.3
RSI Conversion factor R
7 5.6782 40