Percentage Calculator

Calculate percentages, percentage of a number, and percentage change between values.

100% BROWSER-BASED

% of

25% of 200

50.00

/ HOW TO USE

How to Use Percentage Calculator

This tool runs entirely in your browser. Upload your file, make your changes, and download the result. Your files never leave your device — everything is processed locally for maximum privacy.

/ FEATURES

Key Features

100% Client-Side Processing

No File Size Limits

Completely Free

Privacy Focused

Instant Results

Works Offline

/ USE CASES

Common Use Cases

—Calculate discounts and sales prices
—Figure out tips at restaurants
—Determine grade percentages
—Calculate percentage increases/decreases

/ FAQ

Frequently Asked Questions

How do I calculate percentage of a number?

Multiply the number by the percentage and divide by 100. For example, 25% of 200 = 200 × 25 ÷ 100 = 50.

/ YOUR PRIVACY

Your Privacy is Guaranteed

Unlike other tools that upload your files to servers, ToolBox processes everything locally in your browser.

No server uploads

Instant processing

Works offline