Identify the grading scale used by your school or university
Check whether the percentage-to-GPA conversion is linear or based on a fixed chart
Use the official conversion formula if one is provided
If no formula is provided, use the institution’s conversion table
Convert each course percentage to its GPA equivalent
Multiply each course GPA by its credit hours, if applicable
Add all weighted GPA values together
Add all credit hours together, if applicable
Divide total weighted GPA by total credit hours to get cumulative GPA
If no credit weighting is used, average the GPA values directly
Verify the result against your institution’s policy
Use a GPA calculator only if it matches your school’s scale