Privacy policy

• We don't store your numbers. The calculators do their work in your browser, and we don't keep a copy of what you enter.
• No account needed. You can use every tool without signing up.
• Your data stays in your hands. Your inputs are saved in your browser so you can pick up where you left off, and the tool's reset button clears them. You're responsible for your device and for anything you choose to share; a share link includes your figures, so anyone you send it to can see them.
• Messages you send us. If you use the contact form, we receive what you write, and your email address if you include it, so we can reply. Messages are handled by our hosting provider, Netlify. The calculators never send anything through this form.
• Service providers and advertising. We use service providers to run the site, and we may work with advertising partners such as Meta and Google. They may use cookies and similar technologies to measure and improve our ads, under their own privacy policies. We aren't responsible for how third parties handle information.

We may update this policy at any time.