Percentage Calculator
Free online percentage calculator. Calculate percentages, percentage change, and percentage of a number instantly.
About This Free Online Percentage Calculator
Our free online percentage calculator handles three common percentage scenarios: "What is X% of Y?" finds the portion, "X is what % of Y?" finds the percentage, and "What is the percentage increase/decrease?" calculates change between two numbers. All processing happens in your browser with instant results.
Features of Our Percentage Calculator
- What is X% of Y — find the portion
- X is what % of Y — find the percentage
- Percentage increase/decrease calculator
- Real-time results as you type
- Copy result to clipboard
- 100% private — browser-only processing
How to Use the Percentage Calculator
Using this tool is simple and requires no signup or registration. Follow these steps:
- Select the calculation mode: Find percentage, Find percent, or Percentage change.
- Enter the numbers in the input fields.
- View the result instantly below.
- Click Copy to copy the result to your clipboard.
Frequently Asked Questions About Percentage Calculator
How do I calculate X% of Y?
Use the "What is X% of Y" mode. Enter X as the percentage and Y as the total. The result is (X × Y) ÷ 100.
How do I calculate percentage increase?
Use the "Percentage Change" mode. Enter the original value and the new value. The calculator shows the increase or decrease as a percentage.
Is my data private?
Yes. All calculations happen entirely in your browser. We never see, store, or transmit your numbers.
Why Choose Text Toolbox?
Text Toolbox provides free, private, and instant online text tools. Unlike other text utility websites that require signup accounts or send your data to servers, all our tools process your text entirely in your browser. This means your content never leaves your device — we cannot see it, store it, or share it. Our tools are fast, lightweight, and work on any device with a modern web browser.