Percentage Calculators
Easily calculate percentage increases, decreases, discounts, and more.
About this site
This site makes it easy to calculate percentages for any purpose — from discounts and tips to increases, decreases, and more. Quickly find the answers you need with our simple, accurate percentage calculator.
Frequently Asked Questions
What is a percentage?
A percentage is a way to express a number as a fraction of 100. It shows how one part compares to the whole, using the percent symbol (%). For example, 25% means 25 out of 100 — or one-quarter of the total.
Why are percentages important?
Percentages appear in everyday life — from shopping discounts and tip calculations to exam scores, interest rates, and even food nutrition labels. Understanding how to use percentages helps you make informed decisions, analyze data, and compare values across different scales.
How do you calculate a percentage?
To calculate a percentage, use the formula: (X / Y) × 100 = P%. Divide the part (X) by the whole (Y), then multiply by 100 to get the percentage value.
For example, if you scored 45 out of 60 on a test: (45 / 60) × 100 = 75%. That means you scored 75%.
What can this percentage calculator do?
This calculator helps you solve common percentage problems:
- Find what percentage one number is of another
- Calculate a specific percentage of any amount
- Determine the total when you know a part and its percentage
- Calculate increases or decreases by percentage
How is this calculator useful in real life?
Let’s say Mars, Inc. states that 20% of M&M’s in a bag are orange. No matter the size of the bag — small or large — that percentage remains the same. Percentages help make sense of proportions, even across different quantities or populations.
Do I need to do any math?
Not at all! This site does the calculations instantly. Just input your values and the calculator will show you the answer — no formulas or spreadsheets needed.