Privacy Policy

Last updated June 2026

This policy describes how calculators.dev handles your information today. It is written in plain language and reflects only what the site actually does right now.

Your calculator inputs stay on your device

When you use a calculator on this site, the numbers you type are processed entirely in your browser. Your inputs are never sent to or stored on our servers. We do not log, transmit, or save the values you enter.

Some calculators may keep your most recent inputs in your browser using localStorage, or put them in the page URL as query parameters so a calculation is easy to bookmark or share. In both cases the data lives on your device and under your control — clearing your browser storage removes it.

No accounts, no server-side database

There are no user accounts and no login. We do not run a server-side database that stores personal information about you, because the site does not collect any.

No tracking cookies or input analytics

calculators.dev does not set advertising cookies or tracking cookies, and we do not use analytics that capture the values you enter into a calculator. We do not build a profile of you across the site.

Affiliate and external links

Some pages may include affiliate or other external links. If you follow a link to another website, that third party may set its own cookies and collect information according to its own privacy policy. That activity happens on the third party's side, not ours, and we have no control over it. We encourage you to review the privacy policy of any site you visit through a link here.

Contact

Questions about this policy? Email us at contact@calculators.dev.

This page explains our current privacy practices and is not legal advice.