Privacy Policy

Summary

• The values you type into our calculators stay in your browser.
• We do not require accounts and do not ask for your name or email to use any tool.
• We do not set cookies or store data on your device.
• We do not currently use analytics or advertising services.
• Our hosting and font providers receive standard technical data, such as your IP address, when your browser loads the site.

Calculator inputs

All calculations run locally in your web browser. The values you type into our calculators — loan amounts, dates of birth, body measurements, grades and everything else — are not transmitted to, collected by or stored on our servers. When you close or reload the page, those values are gone.

The random number generator uses your browser's built-in cryptographic random source, and the numbers it produces are never sent to us.

Accounts

We do not offer or require user accounts, and we do not ask for your name, email address or other personal details to use any calculator.

Information collected automatically

Like most websites, our hosting provider may automatically record standard technical information when your browser requests a page, for security, abuse prevention and reliability. This can include:

• Your IP address and approximate location derived from it.
• Your browser type, operating system and device type.
• The pages requested, the referring page and the date and time of the request.

We do not use this information to identify individual visitors, and it never includes the values you enter into a calculator.

Third-party services

The site relies on two outside services to load:

• Cloudflare hosts and delivers the site. See the Cloudflare privacy policy.
• Google Fonts provides the typefaces. When your browser downloads them, Google receives your IP address and browser details. See the Google privacy policy.

Cookies and local storage

We do not set cookies, and we do not use local storage, session storage or similar technologies to track you. The "Copy" button on calculator results writes to your clipboard only when you click it, and we cannot read your clipboard.

Advertising and analytics

We do not currently use advertising or analytics services. If we add advertising (such as Google AdSense) or analytics in the future, third-party vendors, including Google, may use cookies to serve ads based on your prior visits to this and other websites. Before doing so, we will update this policy, describe the vendors involved, explain how to opt out of personalized advertising and provide any consent options required by law.

Emails you send us

If you contact us by email, we receive your email address and the contents of your message. We use them only to reply and to improve the site, we do not add you to a mailing list, and we do not sell or share your message with third parties. You can ask us to delete your correspondence at any time.

How we share information

We do not sell, rent or trade personal information. We disclose information only to the service providers listed above as needed to run the site, or when required by law.

Your rights

Depending on where you live — for example under the GDPR in the European Union and United Kingdom or the CCPA in California — you may have the right to access, correct or delete personal information about you, or to object to certain processing. Because we do not store your calculator inputs or create user profiles, the only personal information we usually hold is email correspondence. To make a request, please contact us.

Security

The site is served exclusively over HTTPS, which encrypts the connection between your browser and our servers. Because calculator inputs never leave your device, there is no stored calculation data that could be exposed.

Children

The site is not directed at children under 13 and we do not knowingly collect personal information from them. If you believe a child has sent us personal information, please contact us and we will delete it.

Changes

We may update this policy as the site changes. The latest version will always be posted on this page with its "last updated" date, and significant changes — such as adding advertising or analytics — will be described here before they take effect.

Contact

Questions about this policy can be sent through our contact page.