About Percent-Calculator.io

Percent-Calculator.io is a free online tool for calculating percentages quickly and accurately. Whether you're calculating a tip, figuring out a discount, or working on homework, we've got you covered.

Your Privacy Matters

All calculations happen right in your browser. Your numbers are never sent to any server. We use Google Analytics (with your consent) to understand how people use the site, but we never see or store the values you calculate.

What You Can Calculate

• Basic percentages: What is X% of Y? X is what % of Y? Percentage change
• Practical tools: Tips, discounts, sales tax, markup, profit margin
• Academic: Test grades, GPA calculation
• Conversions: Fractions to/from percentages, decimals to/from percentages

Features

• Instant results: Calculations update as you type
• Show your work: Every result shows the formula used
• Copy to clipboard: Easily copy results for use elsewhere
• Mobile-friendly: Works great on phones and tablets
• No sign-up: Just start calculating

Accuracy Disclaimer

While we strive for accuracy, this calculator is provided for informational purposes. For important financial, academic, or professional calculations, please verify results independently.

Contact

Have feedback or found a bug? We'd love to hear from you at support@percent-calculator.io