Subtract old from new, divide by old, and multiply by 100.
Developer Tool
Percentage Calculator
Calculate percentages, changes, discounts, markups, and reverse percentages.
- Instant results
- Mobile friendly
- Free to use
Quick answer
What is a percentage calculator?
It applies common formulas for percentages, changes, discounts, markups, and reverse values.
Enter values.
Simple instructions
How to use the Percentage Calculator
Follow these steps to get a clear result.
- 1
Enter the required input.
- 2
Choose the available options.
- 3
Run the tool and review the result.
- 4
Copy or download the output when appropriate.
Frequently asked questions
Percentage Calculator FAQ
No. The calculator provides mathematical estimates only.
