Percentages show up everywhere. A sale is 30% off. Your salary went up 10%. You want to leave a 15% tip. Your exam score is 78%. Once you get the hang of it, the maths isn’t hard—but when you’re in a hurry or the numbers are messy, it’s easy to second-guess yourself. A percentage calculator takes the stress out. You enter the numbers; it gives you the answer. What is 25% of 80? What percent is 18 of 90? If something was 50 and is now 65, what’s the percentage increase? The tool handles all of that in seconds, so you can focus on the decision (buy or not, tip how much) instead of the arithmetic.
The basics are simple. A percentage is a fraction out of 100. So 25% means 25/100, or 0.25. “What is X% of Y?” means multiply Y by (X ÷ 100). “X is what percent of Y?” means divide X by Y and multiply by 100. For increase or decrease: find the difference between the new and old value, divide by the old value, multiply by 100. So if a price went from 80 to 64, the decrease is (80 − 64) ÷ 80 = 0.20, or 20%. You can do that by hand, but when you’re comparing several options or double-checking a bill, a calculator is faster and less error-prone.
Real-life uses are endless. Shopping: “This was ₹2,000, now it’s 25% off—what do I pay?” Grades: “I got 42 out of 50—what’s my percentage?” Salary: “My raise is 8%—how much is that in rupees?” Tips, tax, discounts, statistics—once you’re comfortable with percentages, you spot them everywhere. A percentage calculator doesn’t replace understanding; it just makes the number-crunching instant so you can make the call and move on.
We have a free percentage calculator that runs in your browser. You enter your numbers and choose what you want: percentage of a number, what percent one number is of another, or percentage change. You get the result immediately. We don’t store your data. Use it for shopping, tips, grades, or any time you need a percentage and don’t want to reach for a pen.