How do I calculate a sales tax or discount?

Use the "X% of Y" tab for standard discounts (e.g., 20% of $80 is $16), or use "Percentage Decrease" to calculate the final price after discount.

Does this calculator round numbers?

Results are displayed accurately up to 4 decimal places for precision.

Can I use this on mobile without an internet connection?

Yes! All calculations run purely on JavaScript in your browser.

Calculators

Percentage Calculator

Solve any percentage problem: calculate X% of Y, what percentage X is of Y, percentage increase/decrease, and percentage difference.

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How to Use Percentage Calculator

Select Calculator Mode

Choose the percentage problem you want to solve from the 4 clear tabs.

Enter Values

Type in your numbers (X and Y); answers calculate instantly in real time.

Review Explanation

Read the formula breakdown or click Copy to use your calculated result.

Key Features & Benefits

4 Dedicated Mathematical Modes: "X% of Y", "X is what % of Y", "Percentage Increase/Decrease", and "Percentage Difference"
Clear, educational step-by-step formula breakdown showing how the answer was calculated
Supports negative numbers, decimals, and large monetary amounts
One-click result copying and instant clearing for rapid calculations
Mobile-optimized touch keypads and responsive layout

Supported Formats & Privacy

Conversion Pipeline

Interactive real-time numerical calculators

Files are processed in sandboxed client memory. No registration or software installation needed.

Client-side ProcessingFree & Watermark-Free

Frequently Asked Questions about Percentage Calculator

Everything you need to know about using this tool safely and effectively.

Percentage Change has a direction (an initial value moving to a final value, resulting in an increase or decrease). Percentage Difference compares two numbers when neither is the original baseline.

Other tools you might find helpful alongside Percentage Calculator.

Calculators