Percentage Calculator
Find a percentage of a number, a part-to-whole ratio or a percentage change.
Result
How to use
Choose a calculation and enter A and B.
Run the tool to calculate or transform the input.
Copy the result or save it as a text file.
FAQ
What rules does this tool use?
A% of B is A × B / 100. Change from B to A is (A − B) / |B| × 100.
What are the limits?
A zero reference is undefined for ratios and changes. Decimal results are approximate.
Are my inputs uploaded?
Tool inputs are processed in your browser. Advertising makes separate requests as described in the privacy policy.