Last updated: July 18, 2026
This Privacy Policy explains how bumpcalculator.com ("we," "us," the "Site"), operated by 1UP Media AB, handles information when you use our calculators and guides. We've built this site to be private by design, and we've tried to write this policy in plain English.
Our calculators run entirely in your browser. The numbers and dates you enter — your last period, your baby's weight, and so on — are used only to show you a result on your own device. We do not send that information to our servers, and we do not store it. If you close or refresh the page, it's gone.
We do not ask you to create an account, and we do not collect names, email addresses, or the health information you type into our tools. A small number of features (such as saving a guide for later) may store a preference in your browser's local storage on your own device; this never leaves your device and is not visible to us.
We use Google Analytics 4 to understand, in aggregate, how people find and use the Site — for example, which calculators are popular. This service uses cookies and similar technologies to collect standard internet log information and anonymized usage data, such as approximate location, device type, and pages visited. We have enabled IP anonymization. This helps us improve the Site; it does not identify you personally to us.
We may display ads through Google AdSense and other Google advertising products to keep the Site free. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this and other websites.
Cookies are small text files stored on your device. We (and the analytics and advertising services above) use them to remember preferences and measure usage. You can control or delete cookies through your browser settings. Blocking cookies may affect how some parts of the Site work, but the calculators themselves will still function.
Depending on where you live, you may have rights under laws such as the EU/UK General Data Protection Regulation (GDPR) or the California Consumer Privacy Act (CCPA) — including the right to access, correct, or delete personal data, and to opt out of the "sale" or sharing of personal information for targeted advertising. Because we don't hold personal accounts or the data you enter into the tools, most requests relate to the cookie-based analytics and advertising described above, which you can manage using the opt-out links provided. You can also contact us using the details below.
This Site is intended for adults and is not directed to children. We do not knowingly collect personal information from children.
We may update this policy from time to time. When we do, we'll revise the "last updated" date at the top of this page.
Questions about this policy or your privacy? See our contact page.