🎓 Student Tool

Percentage Calculator

Marks percentage, X% of a number, what percent X is of Y, and increase/decrease — five calculators in one.

%

Choose Calculation

Everything updates live as you type — no submit button
Enter each subject's marks and maximum — get your overall percentage instantly. Results above 90% show a topper chip, below 33% show an at-risk chip.
SubjectMarks ObtainedMax Marks
Your Percentage 0.00%
Total: 0 / 0
What is X percent of Y? Example: 18% of 2,50,000 = 45,000 (GST, tips, commissions).
% of
Result45,000
X is what percent of Y? Example: you scored 412 out of 500 — that's 82.4%.
of
Result82.40%
Percentage change from an old value to a new one — salary hikes, price drops, growth rates.
Change +16.67%
Original price minus a percentage off — see what you pay and what you save.
−
You pay ₹1,949
You save ₹1,050 (35% off)
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Marks Table
Add unlimited subjects with individual max marks — mixed totals like 80+70 marks papers work fine.
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Five-in-One
Marks %, X% of Y, what-percent, increase/decrease and discount — switch modes in one click.
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100% Private
All math runs locally in your browser. Your marks never leave your device.

How is percentage calculated?

Marks percentage = (marks obtained ÷ total maximum marks) × 100. When subjects have different maximums, add up all obtained marks and divide by the sum of all maximums — that's what the marks table does.

Percentage change = (new − old) ÷ old × 100. A positive result is an increase, negative is a decrease. Discount = price − (price × discount% ÷ 100).

❓ Frequently Asked Questions

Use the Marks % tab: enter each subject's obtained marks and its maximum. The calculator sums everything and shows your overall percentage — the same method used on Indian mark sheets.

Typically 33% per subject and overall for CBSE and most state boards. The tool flags results under 33% with an at-risk chip so you can spot trouble early.

Yes — every row has its own max-marks field. A 80-mark English paper and a 100-mark maths paper are weighted correctly by the totals.

Yes, 100% free with no signup, and nothing you type ever leaves your browser.