Education Calculators
Quick, accurate answers to the numbers students deal with most: converting a CGPA into the percentage an application asks for, and checking whether attendance is enough to sit exams. Each tool shows the formula it uses, so you can check the result against your board's or university's rules.
Education Calculators
CGPA, percentage and why formulas differ
CBSE links its 10-point CGPA to percentages with a factor of 9.5, so a CGPA of 8.6 is about 81.7%. Universities set their own rules — some multiply by 10, others subtract a number first — so the CGPA to Percentage Calculator lets you enter your university's formula as well.
Staying above the attendance minimum
Many colleges require 75% attendance, often per subject. The Attendance Calculator shows your current percentage, how many classes in a row you need to reach the minimum, or how many you can miss and stay above it.
For marks and other everyday percentages, the Percentage Calculator covers percentage of marks and percentage change, and the Age Calculator checks age on an exam's cut-off date.
Frequently asked questions
How do I convert CGPA to percentage?
For CBSE, multiply by 9.5. For college CGPAs, use the formula your university publishes; it's often printed on the grade card.
How is attendance percentage calculated?
Classes attended ÷ total classes held × 100. 36 out of 48 classes is 75%.
Are these calculators free?
Yes, with no sign-up. Everything is calculated in your browser.