Calculate percentages, fraction to percentage, increase/decrease, and more with ease. Get instant results and download professional reports.
Calculations are based on arithmetic ratios and verified on-the-fly.
As you type, your percentage breakdowns and professional report will appear here instantly.
Percentages are everywhere. From calculating a tip at a restaurant to figuring out how much you're saving during a holiday sale, understanding percentages is a crucial life skill.
The word "percent" literally means "per hundred." So, 20% simply means 20 out of 100. Our calculator automates the math, but knowing the underlying concept helps you make quick financial decisions on the fly.
One of the most common uses for percentages in business and finance is calculating growth or decline. If your website traffic goes from 1,000 visitors to 1,500, what is the percentage increase?
The formula is: ((New Value - Old Value) / |Old Value|) × 100. In this case, it's a 50% increase. This metric is vital for tracking performance over time, whether it's sales revenue, weight loss, or stock market returns.
Shopping becomes much easier when you can quickly calculate discounts. If a $50 shirt is 20% off, you can use our first calculator ("What is X% of Y?") to find the discount amount ($10). Subtract that from the original price, and you pay $40.
Similarly, to add a 7% sales tax to that $40 shirt, calculate 7% of 40 ($2.80) and add it to the total ($42.80).
A common mistake in news reporting and business is confusing percentages with percentage points. If an interest rate rises from 4% to 5%, it has increased by 1 percentage point.
But, the percentage increase is actually 25% (because 1 is 25% of 4). Understanding this distinction is crucial for accurately interpreting financial news and data.
While basic math can be done in your head, complex numbers (like finding 17.5% of 1,432.89) require a tool. Our online percentage calculator provides instant, accurate results without the need to remember formulas or fumble with a physical calculator.
It's designed to handle the three most common scenarios you'll encounter, saving you time and preventing costly mathematical errors.
Everything you need to know about this tool.
