Last updated: October 2026.
What you enter
All calculations happen in your browser. The numbers you type, such as your weight, income or dates, are never sent to our servers. If you copy a page link with values in the address, those values are in the link you share. We remember only your metric or imperial preference in your browser's local storage.
Advertising and cookies
We do not currently show ads or set advertising cookies. If we add advertising in future, this page will be updated first.
Our host may keep standard server logs (such as IP address and pages requested) for security and reliability. These never include the values you enter into a calculator.
Children
CalcExplained is a general-audience site and is not directed at children under 13. We do not knowingly collect personal information from children.