Online Percentage Calculator

Quickly calculate percentages, add or subtract percentages from numbers.

Calculation History
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Your Go-To Online Percentage Calculator

Simplifying percentage calculations for everyone.

What is a Percentage Calculator?

A percentage calculator is a specialized digital tool designed to perform calculations involving percentages. It simplifies tasks like finding a percentage of a number, adding or subtracting a percentage from a value, or determining percentage changes.

Our online percentage calculator offers a user-friendly interface to handle various percentage-related math problems quickly and accurately, directly from your web browser.

Key Features at a Glance

  • Calculate "X% of Y": Easily find what a certain percentage of a given number is.
  • Add Percentage (+%): Increase a number by a specified percentage.
  • Subtract Percentage (-%): Decrease a number by a specified percentage.
  • Two-Line Display: See your current input clearly on the main line while tracking the previous operation or result on the upper line.
  • All Clear (AC) Function: Clears the entire calculation and display.
  • Error Correction (Backspace): Easily remove the last entered digit.
  • Persistent History: All your calculations are automatically saved locally in your browser for easy review.
  • Intuitive & Modern Design: A clean, responsive interface for any device.
  • Full Keyboard Support: Use your computer's keyboard for numbers, operators, and functions.

How to Use Our Percentage Calculator

Using our online percentage calculator is straightforward:

  1. Input Your First Number
    Enter the base number (e.g., the total amount, or the original value).
  2. Choose a Percentage Operation
    Select the desired percentage operation:
    • "% of": To find what X percent of the first number is.
    • "+%": To add X percent to the first number.
    • "-%": To subtract X percent from the first number.
  3. Input the Percentage Value
    Enter the percentage (the "X" in "X%").
  4. Get Your Result
    Press the "=" button or "Enter" to see the calculated answer. The full expression will be recorded in the history.
  5. Review History
    All your completed calculations are automatically logged for easy reference.

Why Use Our Online Percentage Calculator?

Our online percentage calculator simplifies a common mathematical challenge, offering several advantages:

  • Accuracy & Speed: Get instant, precise results for complex percentage calculations.
  • Versatility: Handle various percentage scenarios (find percent, add percent, subtract percent).
  • Accessibility: Available on any device with an internet connection, no installation needed.
  • User-Friendly: Intuitive design makes it easy for anyone to use.
  • Convenience: Persistent history saves your past calculations, aiding review and re-use.
  • Free to Use: A powerful and reliable tool for all your percentage needs, completely free.

Frequently Asked Questions

You can currently calculate "X% of Y," add "X%" to Y, and subtract "X%" from Y. We plan to add more functionalities like percentage change in the future.

All your completed percentage calculations are automatically saved in the "Calculation History" section. This history is stored locally in your browser, so it will be there even if you close and reopen the page. You can clear it at any time using the "Clear History" button.

Yes, our online percentage calculator features a fully responsive and adaptive design. It adjusts seamlessly to fit various screen sizes and orientations, ensuring a consistent and excellent user experience on desktops, tablets, and smartphones.