Plain language, no legalese padding
Privacy Policy
This page explains, in plain terms, what happens to the personal numbers you type into this site (age, height, weight, and any goal weight) and what this site collects, or does not collect, about your visit. Short version: every calculation runs entirely in your browser, nothing you type is sent to a server, and there is no account, login, or tracking cookie on this site.
What happens to the numbers you enter
The calculator on this site's homepage does its math entirely inside your browser, using JavaScript. Your age, sex, height, current weight, activity level, and any goal weight you type is never sent to a server, never logged, and never stored in any database on this site. There is no form anywhere on this site that transmits your calculator inputs anywhere.
This is a direct consequence of how the site is built: it is a static site with no backend that receives, processes, or stores what you type. There is no infrastructure on this site's side capable of receiving those numbers, even if someone wanted to.
Theme preference and saved calculator values
The only things this site saves on your device are your light or dark theme preference and your last entered calculator values, stored in your browser's localStorage. This does not identify you, is never sent to any server, and only exists so the page can remember your preferences and inputs on your next visit. You can clear it at any time by clearing this site's data in your browser.
The feedback button
Below the calculator there is an optional thumbs-up or thumbs-down feedback button. Clicking it sends an anonymous signal (just the vote count, no information that identifies you, no stored IP address, no tracking cookie) to this site's backend, purely so the count can be tallied. A local marker in your browser prevents you from being asked to vote again repeatedly, but that marker does not identify you personally, it only stops a second vote from the same browser.
Analytics
This site may run Cloudflare Web Analytics, a privacy-focused analytics service that does not use cookies or collect personally identifiable information, and does not track visitors across other websites. It reports aggregate metrics only, such as how many pages were viewed and roughly how long a page took to load.
The only other technical information involved is the standard request-level data (source IP address, browser type, request time) that Cloudflare's network processes automatically to deliver the page to your browser, the same way any hosting provider does. That falls under Cloudflare's own privacy policy as the network operator, and is not accessed, exported, or combined by this site to identify visitors individually.
Cookies
This site does not use advertising tracking cookies or third-party profiling cookies. The only local storage used is the localStorage mentioned above, for theme preference and calculator values, which is technically not a cookie and is not automatically sent to any server with every request, unlike a traditional cookie.
Hosting and infrastructure
This site is hosted on Cloudflare's network, which processes the technical requests needed to deliver the page to your browser (source IP address, browser type, request time), the same way any hosting provider does. That technical infrastructure data falls under Cloudflare's own privacy policy as the network operator, and is not accessed, exported, or combined by this site to identify visitors individually.
What this site does not do
To be explicit rather than vague: there is no user account system, no login, no email newsletter signup, no advertising network, no remarketing pixel, and no sale or sharing of visitor data, including the health-related numbers you enter, with data brokers or anyone else. The calculator, the two guide pages, and this privacy page are the entire functionality of this site, and none of them require, request, or benefit from collecting personal information.
This site is not medical advice
The calculator and guides on this site are provided for general educational and planning purposes only. They estimate calorie needs using published formulas, they do not diagnose, treat, or replace individualized medical or nutritional advice, and nothing on this site should be treated as personalized medical guidance. Consult a doctor or registered dietitian before starting a weight-loss plan, particularly at a large calorie deficit or alongside an existing health condition.
Changes to this policy
If the way this site collects or handles data changes in the future (for example, if a new feature required saving something on a server), this page will be updated to reflect that change before it takes effect. There is no fixed review schedule, but the commitment is to keep this text matching what the tool actually does, not a generic description copied from elsewhere.
Why a browser-only calculator is more private by design
Many online health and diet calculators send your age, weight, and other personal details to a server to perform the calculation, meaning that information passes through a third party's infrastructure, even briefly. This site was built the opposite way on purpose: the JavaScript that computes your calorie target ships to your browser once, as part of the page, and every calculation happens on your own device using your own processor. Nothing about your specific numbers ever needs to leave your computer or phone for the tool to work, which is a structural privacy guarantee rather than a policy promise that depends on trusting a server operator to behave.