Percentage Calculator
Percent of a number, what percent one number is of another, and percentage change.
Result
How to use
- 1
Choose what you want to calculate.
- 2
Enter X and Y.
- 3
The answer updates as you type.
Questions
How do I calculate percentage change?
Change % = (New − Old) ÷ Old × 100. A negative result means a decrease.
What is 20% of 150?
20 ÷ 100 × 150 = 30.
About this Percentage tool
Percentage Calculator — Percent of a number, what percent one number is of another, and percentage change. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Choose what you want to calculate.
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Results are estimates to help you plan. They are not financial, tax or medical advice.