📌 Overview

Solve everyday percentage problems: find X% of a number, what percent one number is of another, and percentage increase or decrease.

➗ Percentage Calculator

Solve everyday percentage problems: find X% of a number, what percent one number is of another, and percentage increase or decrease.

What is X% of a number?

Result

X is what percent of Y?

Result

Percentage change from old to new

Result

🔒 All processing happens in your browser. No data is uploaded to any server.

📋 How to Use

Pick the type of percentage question.
Enter the two numbers.
The answer appears instantly below each row.
Use as many of the three calculators as you need.

❓ FAQ

How do I calculate percentage change?

Percentage change = (new − old) / old × 100. A positive result is an increase; a negative result is a decrease.

What does "X is what percent of Y" mean?

It tells you what proportion X represents of Y, calculated as X / Y × 100.

Are decimals supported?

Yes, you can enter decimal values in any field and results are rounded to two decimals.

💡 Use Cases

🛍️

Shopping & Discounts

Work out how much you save at a given percentage off.

📊

Data & Reports

Compute growth rates and shares for spreadsheets.

🎓

Grades

Convert scores into percentages quickly.

🔗 Related Tools

📖 Deep Dive: Percentage Calculator

Solve everyday percentage problems: find X% of a number, what percent one number is of another, and percentage increase or decrease.

Percentage Calculator is a free tool that runs 100% in your browser. No signup, no uploads — your data stays private. Perfect for everyday text and data tasks, saving you time and reducing mistakes.