Percentage Calculator

Calculate percentages instantly. Find what is X% of Y, what percent X is of Y, percentage increase/decrease, and more with formulas shown.

Percentage Calculator

Percentage Calculations Explained

Four Calculation Types

  • What is X% of Y? - Find a portion of a value (e.g., 20% of 150 = 30)
  • X is what % of Y? - Find the percentage relationship (e.g., 30 is 20% of 150)
  • Percentage Increase - Add a percentage to a value (e.g., 100 + 15% = 115)
  • Percentage Decrease - Subtract a percentage from a value (e.g., 100 - 15% = 85)

Common Use Cases

  • Calculating discounts and sales tax
  • Grade percentages and test scores
  • Financial growth and depreciation
  • Tip calculations and bill splitting

Percentage Calculator - FAQ

The Percentage Calculator is designed to be simple and intuitive. Just follow the on-screen instructions: upload your file or enter your data, adjust any settings if needed, and click the process button. Your results will be ready instantly for download or copying.
No. All processing happens entirely in your browser using client-side JavaScript. Your files, text, and data never leave your device. We cannot see or access your content.
Since processing happens in your browser, limits depend on your device's available memory. For best performance, we recommend files under 50MB for image tools and 100MB for PDF tools.
Percentage Calculator supports the formats mentioned in the tool interface. For specific format details, refer to the tool's instructions above.
Yes, all ToolzyPro tools are fully responsive and work on mobile devices, tablets, and desktop computers.

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