Stanford Highschool GPA

I’m an HS senior who applied to Stanford RD, and I heard that Stanford does not take into account freshman year. Does anyone know whether Stanford looks more at weighted or unweighted gpa or both? Also, how would I calculate my gpa for Stanford? Would I add the average gpa’s of my two semester sophomore year and junior year with the first semester of my senior year and then find the average of those three numbers? Average sophomore year gpa about 4.17, average junior gpa about 4.225 ish and first semester senior year gpa about 4.48. Averaging all three numbers would be roughly a 4.3 gpa. Is this correct? Thanks a lot!

http://talk.qa.collegeconfidential.com/stanford-university/1837626-stanford-gpa-calculation.html

For those who are wondering, Stanford does consider your freshmen year grade as part of your GPA. However, I’m not sure about whether unweighted or weighted GPA matters more. But I was told that many competitive school is only taking account of your unweighted GPA.