How do I calculate GPA based on numbered grades?

My schools dont use letters like A, B, C, etc for grades. Instead we use averages. e.g: I have a 90 in history, 75 in math, etc. These arent my actual grades, btw.How do I calculate GPA based on numbered grades?
Theoretically, you just add them up and divide by the course hours. How many credits do you need to graduate?


Be careful though....AP/Dual Credit courses are weighted differently. For example, if you have 15 credits, add up your number grades and divide by the number of credits you have RIGHT NOW..... but again, if you have taken AP/DC courses they are weighted (are WORTH more points) so you need to check with your school district for the weighting formulaHow do I calculate GPA based on numbered grades?
Search in google GPA calculator