Your numbers are yours.

Arithora’s calculators run in your browser. The values you enter are not submitted to us.

Calculator inputs

Inputs are held in page memory while you use a calculator. We do not save them in browser storage, cookies, or a database. Reloading the page returns to the example defaults. Copy result writes the displayed answer to your clipboard only when you choose that action.

Appearance preference

The light/dark mode toggle saves only your appearance preference in this browser’s local storage. It is not sent to us and contains no calculator inputs. Until you choose a mode, the site follows your device’s preference. Clearing this site’s browser storage restores that default.

Website requests

Your browser requests pages, scripts, styles, and fonts to display this website. The hosting service may process ordinary technical request information, such as IP addresses and requested URLs. Those page requests do not include your calculator inputs.

Analytics and advertising

This version does not include analytics trackers, advertising scripts, user accounts, or feedback forms. If that changes, this page will be updated to describe the added processing.