Percentage Calculator
Calculate percentage of a number, percentage change, and what percent one number is of another.
20% of 150 = 30
How to use Percentage Calculator
- 1Pick the calculation type.
- 2Enter the two numbers.
- 3See the result instantly.
Frequently asked questions
Which calculations are supported?
X% of Y, percentage change from A to B, and A is what percent of B.
Is the Percentage Calculator free to use?
Yes — every ToolFlexPro utility is 100% free with no signup, watermarks, or hidden limits.
Does it work offline?
The calculation runs entirely in your browser, so after the first load it works even with a spotty connection.
Is my data private?
Nothing you enter leaves your device. There is no server round-trip and nothing is logged.
Can I use it on mobile?
Yes — the tool is fully responsive on phones, tablets, and desktops.