Percentage Calculator

Use our free Percentage Calculator to quickly find percentages, percentage increase, percentage decrease, and what percent one number is of another.

Calculate percentages, percentage increase, percentage decrease, and percent difference easily.

1. What is X% of Y?

2. X is what % of Y?

3. Percentage Increase / Decrease

How the Percentage Calculator Works

This Percentage Calculator helps you solve common percentage problems instantly. You can calculate what percentage of a number equals another value, find what percent one number is of another, and determine the percentage increase or decrease between two values.

Why Use a Percentage Calculator?

Quickly solve common percentage problems
Find percentage increase and decrease easily
Useful for shopping, finance, schoolwork, and business
Save time and avoid manual calculation mistakes

Percentage Calculator FAQs

What is a Percentage Calculator?
A Percentage Calculator is a tool that helps you quickly calculate percentages, including the percent of a number, the percentage increase or decrease, and what percent one value is of another.

How do I calculate a percentage increase?
To calculate the percentage increase, subtract the original value from the new value, divide by the original value, and multiply by 100.

How do I calculate the percentage decrease?
To calculate the percentage decrease, subtract the new value from the original value, divide by the original value, and multiply by 100.

Can I use this calculator for discounts and sales tax?
Yes. A Percentage Calculator is useful for finding discounts, markups, tips, taxes, commissions, and many other everyday calculations.

Is this Percentage Calculator free?
Yes. Our Percentage Calculator is free and easy to use on desktop, tablet, and mobile devices.

Example Calculation

Let’s say you want to find 20% of 150.

Percentage Value = (20 ÷ 100) × 150 = 30

This means 20% of 150 is 30.

Real-Life Uses

A percentage calculator is useful in many real-world situations:

Calculating discounts while shopping
Finding tax amounts on purchases
Tracking increases or decreases in prices
Analyzing business profits and expenses
Solving school math problems

Percentages are used in everyday life, making this tool extremely helpful.

Tips for Using Percentages

To better understand and use percentages:

Remember that 50% means half of a value
25% is one quarter, and 10% is one tenth
Break down complex percentages into smaller parts
Use percentages to compare values easily
Double-check your inputs for accuracy

Understanding percentages makes calculations faster and easier.

Common Mistakes to Avoid

Forgetting to divide by 100 when converting percentages
Mixing up percentage increase and decrease
Using the wrong base value
Misinterpreting percentage results
Rounding too early in calculations

Avoiding these mistakes helps you get accurate results every time.

Quick Tip

To quickly estimate percentages in your head, remember that 10% is easy to calculate. You can build other percentages from that. For example, 20% is double 10%, and 5% is half of 10%.

Want to learn how percentages work? Read our full guide:
https://thecalculatorcenter.com/how-to-calculate-percentages/

You may also want to try our Percentage Increase Calculator or Percentage Decrease Calculator for more detailed calculations.