Percentage Calculator
Calculate percentages, percentage change, discounts, increases, decreases and reverse percentages online.
Percentage Calculator Tool
Calculate percentages, percentage change, discounts, increases, decreases and reverse percentages quickly with formulas and step-by-step explanation.
Calculator Inputs
Formula
Choose a calculation type and enter values.
Calculation Notes
About This Tool
Percentage Calculator is a free online calculator that helps you solve common percentage problems quickly.
You can calculate what X percent of Y is, find what percent one number is of another, calculate percentage increase or decrease, add a percentage to a number, subtract a percentage from a number and find the original value before a percentage increase or decrease.
This tool is useful for students, teachers, business owners, shoppers, accountants, marketers and anyone who needs fast percentage calculations for discounts, prices, taxes, sales growth, scores or financial estimates.
How to Use Percentage Calculator
1. Choose the percentage calculation type.
2. Enter the required numbers.
3. Choose the number of decimal places.
4. Click Calculate.
5. Review the result, formula and explanation.
6. Copy the result or calculation report if needed.
Frequently Asked Questions
Is this Percentage Calculator free?
Yes. This Percentage Calculator is free to use and does not require signup.
Can this calculator calculate percentage change?
Yes. Choose the percentage increase/decrease option, enter the old value and new value, and the tool will calculate the percentage change.
Can I calculate discounts with this tool?
Yes. Use the subtract percentage option to calculate a discount from the original price.
Does this tool upload my numbers to the server?
No. This calculator works directly in your browser using JavaScript. Your numbers are not uploaded to our server.