Privacy Policy

1What we don't collect

We built these calculators so you'd never have to think about privacy. There are no accounts, no sign-ups, and no saved history. Specifically, we do not collect, transmit, or store:

• Any grade, score, weight, or number you enter into a calculator
• Your name, email, or any other identifying information, unless you choose to email us directly
• Cookies used for tracking your grades or calculator inputs across visits

All calculations happen with plain JavaScript running locally on your device. Nothing you type is ever sent to a server.

2What we do collect

Like most websites, we use standard, privacy-respecting analytics to understand how the site is used in aggregate — for example, which pages are visited and roughly how many people use each calculator. This may include:

• General, non-identifying data such as browser type, device type, and approximate location (city or region level, from your IP address)
• Pages visited and how long you spent on the site
• Referral source (e.g., you arrived from a search engine)

This data is aggregated and anonymized where possible, and it is never linked to anything you typed into a calculator.

3Cookies

We use a minimal set of cookies necessary for basic site functionality and analytics. You can disable cookies entirely in your browser settings without affecting how the calculators work — since all calculator logic runs locally, disabling cookies won't break anything you actually came here to use.

4Third-party services

This site may load fonts from Google Fonts and use a third-party analytics provider. These services may set their own cookies or collect anonymized usage data under their own privacy policies. We choose providers that don't require you to be identified individually.

5Children's privacy

This site is designed for students of all ages, including those under 18, and is built specifically to avoid collecting personal information from anyone — students included. Since no personal data is collected through the calculators themselves, no additional information is gathered from younger users beyond the general analytics described above.

6Changes to this policy

If our data practices change — for example, if we add an account system or save feature in the future — this page will be updated, and the "last updated" date at the top will reflect the change. We won't start collecting more than described here without updating this policy first.

7Contact us

If you have questions about this policy or how the site handles data, reach out any time — a real person reads every message.