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Percentage Calculator

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Calculate percentage values, percentage ratios, and increase/decrease.

1. What is X% of Y?

What is% of= ?

2. X is what percent of Y?

is what percent of= ?

3. Percentage Increase / Decrease

Fromto= ?

Privacy Secured: This utility runs 100% inside your browser. No files, logs, or values are uploaded to any server. Your information stays safe on your device.

About Percentage Calculator

The Percentage Calculator is a clean math utility designed to solve common percentage calculations. Whether you are calculating retail discounts, investment returns, tax splits, or percentage changes, our tool provides three independent calculators to get answers instantly.

How it Works

Use any of the three calculators: (1) calculate what X% of Y is, (2) calculate what percentage X is of Y, or (3) calculate the percentage increase or decrease from X to Y. Type your values and see results instantly.

Key Features

  • Three Calculators: Covers all common percentage math queries.
  • Instant Outputs: Computes values dynamically as you type.
  • Clean Layout: Simple card designs for each formula.
  • Runs Locally: Private and fast math calculations.

Technical Details

The calculator uses basic arithmetic operations: (1) $(X / 100) \times Y$, (2) $(X / Y) \times 100$, and (3) $((Y - X) / X) \times 100$. The inputs are parsed as floats and outputs are rounded to 2 decimal places.

Common Use Cases

โ€ขShoppers calculating sales discounts and tax.
โ€ขBusiness owners calculating percentage revenue growth.
โ€ขStudents solving math and percentage problems.

Frequently Asked Questions

Use the third calculator. Enter your starting value (From) and final value (To) to get the percentage change.

Yes. The calculator handles negative numbers and will display percentage decreases accordingly.

Yes. It is 100% free with no limits or advertisements.

๐Ÿ”’ Privacy Guarantee

โœ“Files never leave your device
โœ“No login required
โœ“No database required
โœ“100% browser-based