Privacy Policy

In short

• The numbers and dates you enter into a calculator are processed in your browser. They are not sent to us.
• There are no accounts, and we do not ask for your name or email address to use any calculator.
• The site does not store what you enter on your device after you close the page.
• The site counts visits with Vercel Web Analytics. The figures never include what you enter into a calculator.
• When advertising is shown, advertising partners may collect some data. This is explained below.

What you enter into the calculators

All calculators run as JavaScript in your browser. The values you type, including a date of birth, and the results stay in the memory of the open tab and are discarded when you close or reload it, or when you press Reset. We do not receive, store, read or log them, and we cannot recover them for you. The only value read from your device is its current date, used to fill in today’s date in the date calculators. Copy your result before leaving the page if you need to keep it.

Information collected automatically

Like any website, the servers that deliver this site (our hosting provider) may record technical details of each request, such as your IP address, the page requested, the date and time, and your browser type. These logs are used to keep the service running and secure and to diagnose errors. They do not contain what you enter into the calculators, because that is never sent.

Visit statistics

The site uses Vercel Web Analytics to count visits and to see which pages are used, so that we can tell which calculators are useful and improve them. For each page view it may record the time, the address of the page, the page you came from, your approximate location, your operating system and browser with their versions, and your type of device. The address of a page never contains the numbers or dates you enter, because those stay in your browser.

Vercel states that this service works without third-party cookies and that it recognises a visit by a hash created from the incoming request, which is discarded automatically after 24 hours, and that the data is not tied to an individual or to an IP address. We do not use these figures to identify anyone. You can prevent the statistics from being collected with a content blocker or by turning off scripts for this site; the calculators work the same without them. More information is in Vercel’s documentation on Web Analytics privacy.

Cookies and advertising

The site itself does not set cookies, and the visit statistics above do not rely on third-party cookies. The site is funded by advertising, and when ads are shown they are served by a third party such as Google AdSense. Advertising partners may use cookies, device identifiers and similar technologies to deliver and measure ads, limit how often you see the same ad and, where permitted, show ads based on your interests. We do not control and cannot access the data these partners collect, and nothing you enter into a calculator is shared with them.

Where the law requires your consent for such technologies, for example in the European Economic Area and the United Kingdom, ads that rely on them are shown only after you consent. You can manage personalised advertising from Google through Google’s Ads Settings or through aboutads.info, and your browser lets you block or delete cookies.

Children

The site is a general-purpose utility and is not directed to children. We do not knowingly collect personal information from anyone, including children.

Your rights

Because we do not collect what you enter or create profiles, we hold very little data about visitors. Depending on where you live you may have the right to access, correct or delete personal data held about you, or to object to its use. To make a request, or to ask anything about this policy, use the contact page.

Changes to this policy

If we change how the site handles data, we will update this page and the “Last updated” date at the top.