C- letter grade
On a common unweighted 4.0 scale, C- maps to 1.7 GPA points with a typical percent band of 70–72.
Use your registrar’s chart if it differs—especially for A+ handling, pass/fail, or alternative scales (4.3, 5.0 weighted, etc.).
Quick GPA converter
GPA points: 3.3
Letter: B+ · GPA points: 3.3
Schools vary—always verify the scale your institution publishes.