How to convert psat score to the range score?

The PSAT/NMSQT point scale of 20 to 80 is comparable to the SAT point scale of 200 to 800. A quick way to estimate a comparable SAT score is to add a zero to the end of a PSAT/NMSQT score. For example, a 42 on the PSAT/NMSQT critical reading section is roughly equivalent to a 420 on the SAT critical reading section.