How to use
- Fill in the tool fields.
- See the result immediately in the browser.
- Copy the result if needed — nothing is sent to a server.
What it’s for
Calculate percentages quickly.
Also useful
Also see: rule of three.
FAQ
- Do data leave the browser?
- No. This tool runs 100% locally on your device.
- Do I need to install anything?
- No. Just open the page and use it.