Quickly calculate percentages, values, and percentage changes with 100% accuracy.
What is X% of Y?
Enter values to see results.
Use this tool for financial analysis, academic grading, or simple daily shopping discounts. All calculations happen in real-time in your browser.
Three things come up in daily life where you need a quick percentage answer. First — you see a discount at a store and want to know if the price is actually right. Second — you have an old value and a new value and want to know exactly how much it has increased or decreased. Third — you want to know what percentage one number is of another. This calculator handles all three — instantly, no mental math needed.
Most percentage calculators you find online are built for a single type of problem. This tool handles all three scenarios you are realistically going to need:
This mode answers the question: what is X% of a given number? If a jacket is priced at ₹3,800 and is on a 20% discount, this tells you the exact amount being knocked off. If your salary is ₹65,000 and your employer contributes 12% to provident fund, this calculates the monthly contribution. Anytime you know a percentage rate and need to apply it to a number, this is the mode to use.
You have two numbers and you want to understand the relationship between them as a percentage. A student answered 54 questions correctly out of 75 — what is the score as a percentage? A project is 340 tasks complete out of a planned 500 — what is the completion rate? This mode converts any part-to-whole relationship into a clean percentage figure immediately.
This tells you by how much something has grown or shrunk between two points in time, expressed as a percentage. Revenue was ₹1,20,000 last month and ₹1,47,000 this month — what is the increase in percentage terms? A stock was trading at ₹920 and dropped to ₹782 — how large is the fall as a percentage? Percentage change is one of the most used calculations in business, finance, academics, and personal tracking, and this mode handles both increases and decreases accurately.
You do not need to understand these formulas to use the calculator. But knowing the logic behind the numbers helps you interpret results with confidence and catch any input mistakes before they happen.
Finding a percentage value
Simple in principle, but easy to fumble in your head when the numbers are larger or less round.
Finding what percentage one number is of another
Divide the part by the total, then multiply by 100 to get the percentage.
Calculating percentage change
A negative result means a decrease. The calculator displays this in red with a downward indicator so the direction is always clear.
This calculator uses these exact formulas internally, rounds to two decimal places, and shows a plain-language description of the result so there is no guesswork about what the number represents.
Shopping, discounts, and tax
Every time you look at a sale price, calculate GST on a purchase, figure out how much cashback you are actually receiving, or check whether a bulk deal is genuinely cheaper, you are working with percentages. Doing this in your head while standing in a store is where mistakes happen most.
Academics and examinations
Converting raw marks to percentages, understanding exactly what score you need on the next paper to achieve a target grade, calculating aggregate percentages across multiple subjects — students and parents deal with this constantly, especially during results season.
Finance, investments, and loans
Return on investment, compound interest comparisons, mutual fund NAV changes, fixed deposit rates, loan EMI breakdowns, inflation impact — every single one involves percentage arithmetic. Even a small error here can lead to flawed financial decisions.
Business performance and reporting
Month-over-month revenue growth, gross profit margin, conversion rates, employee attrition, net promoter score changes — business metrics are almost entirely percentage-based. A fast, reliable tool to verify figures on the fly saves time and prevents reporting errors.
Salary and hike
Got a salary hike but not sure what your new salary will be? Enter your hike percentage in the first box and your current salary in the second — instantly get the hike amount. Add that to your current salary and you have your new salary. For example, 15% hike on ₹35,000 = ₹5,250 hike — new salary ₹40,250. Done in seconds.
GST and tax calculations
Every time you make a purchase or raise an invoice, GST is involved. Enter the amount — say ₹12,500 — select 5% and instantly know the exact GST amount. No manual calculation, no guessing. Works for 5%, 12%, 18%, or 28% GST slabs — just change the percentage and get the answer.
Mental math can go wrong — but even when it doesn't, the whole calculation process takes time and effort. With this calculator, everything is in one place. Just select the mode, enter your numbers, and get the answer instantly. Whether you want to know what 15% of 3,500 is, or what percentage change happened from 2,500 to 3,500 — no formula needed, no steps to follow, no second-guessing the result.
Even people who are comfortable with maths make these slips when working quickly or under pressure. This calculator eliminates that risk entirely. The formula is fixed and correct, the result is computed instantly, and the plain-language summary beneath the number confirms exactly what was calculated so you can verify the logic without second-guessing yourself.
When the new value in a percentage change calculation is lower than the original, the result is a negative percentage — this represents a decrease. The calculator handles this explicitly. A negative result appears in red with a downward trend indicator, making the direction of change visually obvious at a glance.
This distinction matters more than it might seem. A result of −15% and +15% look nearly identical as raw numbers but represent completely opposite situations. The visual treatment in this tool ensures you never misread the direction of a change.
Everything this calculator does happens entirely within your browser. No values you enter are transmitted anywhere, stored on any server, or connected to your identity in any way. There is no account to create, no sign-up form, and no limit on how many calculations you run.
The result can be copied to your clipboard with a single tap, making it easy to paste directly into a spreadsheet, message, or document without retyping anything.
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Simple — select the mode you need and enter your numbers. For example, if you want to know what 12.5% of ₹20,000 is — select 'Find Value', enter 20000 and 12.5, done. Or if you have an old price and a new price and want to know how much it increased — select '% Change', enter both values, and get the percentage difference in seconds.
Simple — just two inputs. Enter the percentage in the first box and the amount in the second box. The calculator instantly shows you the result. For example, enter 10 and 500 — you get 50. No formula, no steps.
Just two inputs — enter the part value in the first box and the total value in the second. For example, enter 45 and 60 — you instantly get 75%. Works for exam scores, project completion, sales targets, anything where you need to know what percentage one number is of another.
Written by AtraKit Team
Building free calculators for everyday use
Last Updated: July 2026
* This tool is designed for general everyday use. All calculations follow standard mathematical formulas and are rounded to two decimal places for clarity.