The percentage calculator is one of the most used math tools in daily life — for students, business owners, shoppers, and professionals alike. Whether you need to find what percentage of a number is, calculate a percentage increase or decrease, work out what percent X is of Y, compute a reverse percentage, find percentage change between two values, calculate a discount percentage, or convert marks to percentage — this free all-in-one percentage calculator does it all.
Select from 6 modes: “% of Number”, “X is what % of Y”, “% Increase/Decrease”, “Discount”, “Marks to %”, or “Reverse %”.
Fill in the input fields. All inputs accept decimals — so you can calculate 12.5% of 347.80 or any fractional percentage with full precision.
Get your result instantly — results show the main answer plus additional context like grade, CGPA equivalent, savings amount, or type of change.
Use all 6 calculation types on the same page — no need to visit different websites for different percentage calculations.
Quick Examples:
15% of 200 = (15/100) × 200 = 30
45 is what % of 180? = (45/180) × 100 = 25%
100 to 125 = ((125−100)/100) × 100 = 25% increase
₹1000 at 20% discount = 1000 × 0.80 = ₹800
One tool covers all percentage needs — % of number, what % is X of Y, increase/decrease, discount, marks conversion, and reverse percentage. No need to switch websites.
The marks-to-percentage mode also shows your CGPA equivalent (÷9.5 CBSE formula) and letter grade — giving students everything they need in one result.
Handles any decimal value — 12.5%, 33.33%, 7.85 — with full floating point accuracy. Results rounded to 2 decimal places for clean, readable outputs.
From basic percentage of a number to complex reverse percentage calculations, from marks to percentage for exam results to discount calculator for shopping — this free percentage calculator covers every scenario in one place. Fast, accurate, mobile-friendly, and always free.
