Home › Percentage Calculator Online
Percentage Calculator Online (Free)
Solve everyday percentage problems quickly: discounts, marks, profit, growth and more. Enter two numbers and see all common percentage results at once.
How to use the Percentage Calculator Online
- Enter the required values in the boxes above.
- Click the Calculate button.
- Read the result instantly below the button.
Frequently Asked Questions
How do I calculate X% of Y?
Multiply X by Y and divide by 100. For example, 20% of 500 = 20 × 500 / 100 = 100.
How is percentage change calculated?
Percentage change = (New − Old) / Old × 100. A positive result is an increase, negative is a decrease.
Is this tool free and is my data safe?
Yes, it is 100% free with no signup. Everything runs inside your browser, so your data or files are never uploaded to our server.