Grading that differs from U.S. standards

I'm an international student and the grading system at my university is different from the U.S. grading system. Do I need to try to figure out a GPA on a 4.00 scale?

No. Just leave the GPA space on the admission application blank. Many applicants are international students from universities different grading systems that differ from those in the U.S. When we review your transcripts, we will see and consider the grading scale noted on them.