Frequently asked questions

Is this site free?

Yes, every calculator is free to use with no sign-up. The site is supported by display ads.

Are the results exact?

Each calculator uses standard, well-known formulas for its category. Results are accurate for everyday use; for regulated or legal purposes, confirm with a professional.

Do you store what I enter?

No. All calculations happen in your browser — nothing you type is uploaded or stored on our servers.

Can I use this on mobile?

Yes, every tool is built to work on phones, tablets and desktops.