Free Student Tools — CGPA, Percentage & Attendance Calculators
A free set of calculators for the numbers students deal with all the time — CGPA and SGPA, converting CGPA to percentage, marks and grade percentages, the score you need on a final, attendance, and age. Enter your figures and get an instant, accurate answer.
Everything runs in your browser: nothing is uploaded, there's no signup, and the tools work on any phone or laptop. Where a formula varies by university (like CGPA to percentage), you can pick your board or enter a custom one.
🎓 GPA & Grades5
CGPA Calculator
Calculate overall CGPA from your semester SGPAs and credits.
CGPA to Percentage Calculator
Convert CGPA to percentage — CBSE, VTU, GTU, Mumbai & custom.
SGPA Calculator
Calculate a semester's SGPA from course credits and grade points.
Grade Calculator
Work out a weighted grade from assignments, midterm & final.
Final Grade Calculator
Find the score you need on the final to hit your target grade.
% Percentage3
🗓 Time2
Also useful for student
These live under Text, but they come up just as often here.
GPA & grades
- CGPA Calculator — overall CGPA from your semester SGPAs and credits.
- SGPA Calculator — a semester's grade point average from course credits.
- CGPA to Percentage — convert using CBSE, VTU, GTU, Mumbai or a custom formula.
- Grade Calculator — weighted grade from assignments, midterm and final.
- Final Grade Calculator — the score you need on the final to hit your target.
Percentage & marks
- Percentage Calculator — what is X% of Y, and the two other classic questions.
- Percentage Increase/Decrease — the change between two numbers.
- Marks Percentage — your overall percentage across subjects.
Attendance & age
- Attendance Calculator — your percentage, plus classes you can skip or must attend.
- Age Calculator — exact age in years, months and days, and your next birthday.
Accurate, and honest about it
Grading rules genuinely vary — CBSE converts CGPA with × 9.5, while VTU, GTU and Mumbai University each use their own formula, and attendance minimums differ by college. These tools include the common, documented methods and let you set a custom one where it matters, but for anything official you should always confirm the exact rule with your board or university. The maths is exact; the conventions are yours to choose.
Frequently asked questions
Are these student tools free?
Yes, every calculator is free with no signup and no limits, and they all work on mobile.
How do I convert CGPA to percentage?
The formula depends on your university — CBSE uses CGPA × 9.5. The CGPA to Percentage Calculator lets you pick CBSE, VTU, GTU, Mumbai University or a custom multiplier.
What is the 75% attendance rule?
Most Indian colleges require students to attend at least 75% of classes to sit exams. The Attendance Calculator shows your percentage and how many classes you can miss or need to attend to stay above it.
Is my data uploaded?
No. Every calculation runs entirely in your browser, so your marks, grades and dates never leave your device.
Are the results accurate for official use?
The arithmetic is exact, but grade and conversion rules vary by institution. Use these as reliable estimates and confirm official figures with your board or university.