Percentage Calculator for Every Quick Math Moment

Percentages show up everywhere: discounts, tips, grades, interest, and stats. But the phrasing changes the math. "What is 20% of 80" is different from "15 is what percent of 60" or "what is the percent increase from 40 to 50." Mixing them up leads to wrong answers.

A percentage calculator handles all these cases in one place, so you get the right number no matter how the question is worded.

That matters because the wrong setup is the most common mistake, not the arithmetic itself. Picking the right mode first means you never accidentally solve "percent of" when you actually needed "percent change."

Solve any percentage question:

• Pick the calculation type you need.
• Enter your numbers.
• Read the answer instantly.

Open the Percentage Calculator for quick, accurate results.

Because each mode is laid out separately, you do not have to remember any formula. Choose whether you want a share, a reverse lookup, or a change between two values, and the tool asks for exactly the inputs it needs.

The result appears the instant you finish typing, which makes it easy to run a few quick what-ifs. Compare two discount offers, test how a different score changes your grade, or check several markups in a row without clearing the fields. It is faster than reaching for a calculator app and there is no risk of setting up the formula the wrong way round.

The everyday wins are the best part. Work out a 30-percent-off sale price before you reach the register, check whether a tip matches the bill, or confirm the interest on a loan quote. Each is a different percentage question, and the tool covers them all.

Students and analysts lean on it too. Turning raw scores into percentages, or measuring the percent growth between two figures, takes seconds instead of a scribbled calculation that is easy to get backwards.

Shoppers get the most everyday mileage out of it. Working out the real price after a 30 percent markdown, checking whether a bulk deal actually saves money, or confirming the tip on a receipt are all one quick entry. The same tool that helps a student check a grade helps a shopper avoid overpaying at the register.

• Multiple modes: percent of, reverse, and change.
• Instant answers with no formulas.
• Everyday use: discounts, grades, and more.
• Mobile ready and free.
• Private in your browser.

What is 20% of 80? 16. The tool solves this and other percentage questions instantly.

Can it do percentage increase? Yes, enter two values to get the percent change between them.

Are my numbers stored? No, calculations run locally in your browser.

Can it reverse a percentage? Yes. Enter a part and a whole to find what percent one is of the other.