How to Calculate Your High School GPA (Step-by-Step)

Your GPA (Grade Point Average) converts letter grades into a number that shows your overall academic performance. Colleges, scholarships, and employers all use it as a quick benchmark. Most US high schools use a 4.0 unweighted scale. Some also offer a weighted scale — usually 5.0 — that gives bonus points for AP, IB, and Honors courses.

Letter grades convert to grade points like this: A+ or A = 4.0 · A− = 3.7 · B+ = 3.3 · B = 3.0 · B− = 2.7 C+ = 2.3 · C = 2.0 · C− = 1.7 · D+ = 1.3 · D = 1.0 · F = 0.0 For weighted courses, add 1.0 to the grade point (so an A in AP English = 5.0 instead of 4.0). Some schools add only 0.5 for Honors.

GPA = Sum of (Grade Points × Credits) ÷ Total Credits Example: You took four 1-credit courses this semester. English A (4.0 × 1) = 4.0 Math B+ (3.3 × 1) = 3.3 Science A− (3.7 × 1) = 3.7 History B (3.0 × 1) = 3.0 Total points = 14.0 ÷ 4 credits = 3.50 GPA

Colleges receive both. Most recalculate your GPA using their own formula anyway, so obsessing over weighted vs unweighted misses the point. What actually matters: Did you take the hardest courses available at your school? Did your grades hold up under that rigor? Admissions officers look at both the number and the course difficulty simultaneously. The weighted GPA helps at schools that compare you only within your applicant pool — they can see you took four AP courses while maintaining a 3.8.

This depends entirely on how many credits you have completed. Say you have a 2.8 GPA after 60 credits. If you earn straight A's (4.0) in the next 20 credits: New GPA = (2.8 × 60 + 4.0 × 20) ÷ 80 = (168 + 80) ÷ 80 = 3.1 The earlier you start earning strong grades, the bigger the effect. After junior year, there are fewer semesters left to move the needle significantly.

Use the CalcHub GPA calculator to enter your courses, grades, and credit weights. Switch to weighted mode if your school offers AP or Honors credit. The result updates instantly as you add courses.