How to turn letter grades into grade points
Before you can calculate a GPA or CGPA, each letter grade has to become a number: its grade point. The calculator does this for you, but understanding the mapping helps you sanity-check your result.
The common 4.0 mapping
On a US 4.0 scale a typical mapping is 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 = 1.0, F = 0.0. The plus/minus steps add resolution; a flat-letter school may use just A = 4, B = 3, C = 2, D = 1, F = 0.
The common 10-point mapping
On India's 10-point scale a typical mapping is O = 10, A+ = 9, A = 8, B+ = 7, B = 6, C = 5, P = 4, F = 0. Again, labels and exact points vary by university.
Why “typical” is the key word
There is no single national standard for these mappings — each institution sets its own. Some treat A+ and A as both 4.0; some do not use minus grades at all; some use a 9-point or 7-point scale entirely. That is why the GPA calculator lets you choose the scale, and why your university handbook is the authority when the details matter.
Once each grade is a number, the rest is mechanical: multiply by credits, sum, and divide by total credits. If your transcript shows percentages rather than letters, you first map each percentage to your school's grade band, then proceed the same way.
When your transcript shows numbers, not letters
Some universities print only grade points (8, 9) and never the letter, while others print only the letter. If you have one but need the other, your handbook's grade table is the bridge — match each grade point to its letter there. Never assume a letter means the same points everywhere: at one university A is 8, at another A is 4, and at a third A might be the second-highest grade rather than the top one.
Key takeaways
- Every GPA starts by turning each letter grade into a grade-point number.
- Common 4.0: A=4.0, A−=3.7, B+=3.3…; common 10-point: O=10, A+=9, A=8…
- Mappings are set per institution — some skip minus grades or use 9- or 7-point scales.
- Your university handbook is the authority whenever the exact points matter.