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Last updated: 31 October 2026

Your calculations stay in your browser

Calculators on this site run entirely in your web browser. The numbers you type are not sent to our servers or stored by us.

A few tools need to look up information in public scientific databases, for example to find the name of a chemical structure. Those tools say so clearly on the page, and send only the specific item being looked up to the named database.

Cookies and tracking

This site does not set tracking or advertising cookies and does not require an account.

Server logs

Like any website, the hosting provider that serves these pages may keep short-lived technical logs, such as IP addresses and requested URLs, for security and reliability.

Changes

If this policy changes, the updated version will be posted on this page with a new date.