Calculators

Percentage Calculator

This percentage calculator handles everyday sums: X% of a number, what percent one number is of another, increase or decrease, discounts, marks across subjects and CGPA to percentage.

What is X% of Y?

What is%of?

= 450

X is what percent of Y?

is what % of?

= 75%

Percentage increase or decrease

Fromto

Increase of 15% (+6,000)

Discount calculator

Pricewith% off

Pay 1,749.3 (you save 749.7)

Add or subtract a percentage

±%

+12% = 1,120 · −12% = 880

CGPA to percentage

CGPAEach board and university sets its own formula. Check the one printed on your mark sheet or regulations.

= 79.8%

Marks percentage (several subjects)

Subject 1out of

Subject 2out of

Subject 3out of

255 / 300 = 85%

Calculations run in your browser. Nothing you type is sent or stored.

How to use Percentage Calculator

Find the box for your question, for example "Marks percentage" or "Discount calculator".
Type your numbers; the answer updates as you type.
For marks, add one row per subject with "Add subject".

When to use Percentage Calculator

Exam results. Total marks percentage across subjects, and CGPA to percentage for applications.
Shopping. Final price after a discount and how much you save.
Salary and prices. Percentage hike in salary or rise in prices.
Business. Margins, commissions and tax percentages.

Percentage formulas

X% of Y = X × Y ÷ 100
X as a percent of Y = X ÷ Y × 100
Percentage change = (new − old) ÷ old × 100
Price after discount = price × (1 − discount ÷ 100)
Marks percentage = total marks obtained ÷ total maximum marks × 100

Limits and privacy

CGPA conversion formulas are set by each board and university; the options here are common ones. Always check your institution's official formula.
Calculations run in your browser. Nothing you type is sent or stored.

Frequently asked questions

How do I calculate percentage of marks?

Add up the marks you got in all subjects, divide by the total maximum marks, and multiply by 100. For example, 255 out of 300 is 255 ÷ 300 × 100 = 85%. In the marks box, enter each subject's marks and maximum, and the overall percentage updates automatically.

How do I convert CGPA to percentage?

It depends on your board or university. CBSE uses CGPA × 9.5, so 8.4 CGPA is 79.8%. Anna University uses CGPA × 10, and VTU uses (CGPA − 0.75) × 10. Choose the formula in the CGPA box, and confirm with the formula printed on your mark sheet or in your university's regulations.

How do I calculate percentage increase?

Subtract the old value from the new one, divide by the old value and multiply by 100. A salary going from ₹40,000 to ₹46,000 is a (6,000 ÷ 40,000) × 100 = 15% increase. The calculator also shows decreases with a clear "Decrease" label.

How do I calculate a discount?

Multiply the price by the discount percentage and divide by 100 to get the saving, then subtract it. 30% off ₹2,499 saves ₹749.70, so you pay ₹1,749.30. Type the price and discount in the discount box to see both numbers.

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