Percentage Calculator App by Top New Soft is the kind of install people forget they made, right up until they need a tip split, a discount checked, or a raise turned into a real number. Most of those moments happen mid-conversation, not at your app drawer. So we built Percent Point, a free percentage calculator that runs right here in your browser. No install, no ads, no signup. Move a slider and the answer updates instantly.
Calculate a percentage now
It opens with a worked example already loaded: what is 20% of 150. Switch tabs for the other two ways people actually ask this question, and drag any slider or field to make it yours.
How to use it
Three tabs cover the three questions people actually type into a search bar. “% of a number” answers what is X% of Y, the one you want for tips and discounts. “Is what %” flips it around: you know two numbers and want the percentage between them, useful for grading or a quick markup check. “% change” answers whether a move from one number to another is an increase or a decrease, and by how much, which is what you want for a price change, a pay raise, or a weight goal.
Every field pairs a slider with an editable number box, plus small plus and minus steppers if you would rather tap than drag. The bar chart below the result redraws live so you can see the proportion, not just read a number. Try setting the “of value” to zero, or the “from” value in the change tab to zero. The calculator tells you plainly why that particular question has no answer instead of showing an error or a blank screen. Your last numbers on each tab are saved on your device. Nothing leaves your browser.
How it compares to Percentage Calculator App
Percent Point answers the three percent questions people ask most, instantly and visually. The full Percentage Calculator App goes further: it bundles a tip calculator, a discount and markup calculator, a percentage-increase-decrease tool with saved history, and a calculation log you can revisit later, all wrapped in a proper app icon you can reach without opening a browser.
We kept the core loop: type or drag two numbers, watch the answer and the bar move. We dropped the saved history, the dedicated tip and discount modes, and the offline app shell, on purpose, because a page you land on mid-search should give you the number in seconds, not ask you to install anything first.
Our honest advice: use Percent Point for a one-off calculation while you are out, comparing prices, or settling a quick argument about a discount. Install the app if you find yourself doing this daily and want your calculations remembered, or if you specifically want the built-in tip and markup modes.
Get the full app
Percentage Calculator App by Top New Soft is free on Android and bundles percent, tip, discount, and markup calculators with a saved calculation history.
Frequently asked questions
How do I calculate a percentage of a number?
Divide the percentage by 100, then multiply by the number. For 20% of 150, that is (20 / 100) x 150 = 30. The “% of a number” tab above does this live: move either slider and the answer recalculates instantly.
How do I find what percent one number is of another?
Divide the first number by the second, then multiply by 100. For “30 is what percent of 150”, that is (30 / 150) x 100 = 20%. Use the “Is what %” tab if the second number could be zero, the calculator explains why that particular question has no answer instead of showing an error.
How is percent change calculated, and can it go negative?
Subtract the starting value from the new value, divide by the starting value, then multiply by 100. From 80 to 100 is (100 − 80) / 80 x 100 = 25%, an increase. From 100 to 80 gives a negative result, a 20% decrease. The “% change” tab labels the direction clearly so you never have to guess whether a negative number means good news or bad news.
Can I calculate percentages online without installing an app?
Yes. The calculator above works in any phone or laptop browser, needs no account, and keeps working offline once the page has loaded. Your last inputs on each tab are saved in your browser’s local storage, on your device only.
Is this the official Percentage Calculator App?
No. Percent Point is an original tool we built, inspired by the everyday problem Percentage Calculator App solves. It is not affiliated with, endorsed by, or connected to Top New Soft. If you want the built-in tip and discount modes and a saved calculation history, get the app from the store above.
