Percentage Calculator
Four percentage questions in one place: what is B% of A, A is what percent of B, the percentage change from A to B, and A adjusted by ±B%. Each shows the formula and a cross-check, with one-click presets. Fully computed in your browser.
Runs in your browser
Real-time
What do you want to solve?
Enter numbers
Result
180
Common uses
About this tool
Four percentage questions in one place: what is B% of A, A is what percent of B, the percentage change from A to B, and A adjusted by ±B%. Each shows the formula and a cross-check, with one-click presets. Fully computed in your browser.
How to use
- Fill in the input box above, or click "Fill sample" to try it instantly
- Adjust the options as needed — results update as you type
- Click "Run" to get the result, then copy or export it in one click
Tips
- Runs entirely in your browser — your data never leaves the device
- Completely free, no registration, no usage limits
- Most tools compute in real time as you type