Privacy Policy

Effective date: 10 June 2026

This Privacy Policy explains how BMI Tracker ("we", "us") handles information when you use our website and calculators.

Calculator inputs stay on your device

Our BMI calculators run entirely in your browser using JavaScript. The height, weight, age, and sex you enter are processed locally and are never transmitted to our servers, stored, or sold. When you close or refresh the page, those values are gone.

Information we may collect

Like most websites, our hosting provider may automatically log basic, non-identifying technical data (such as browser type, approximate region, and pages visited) to keep the site secure and reliable. We may also use privacy-respecting, aggregate analytics to understand which pages are useful. This data does not include your calculator inputs.

Cookies, analytics, and advertising

We may use cookies or similar technologies for basic site functionality, security, and privacy-respecting aggregate analytics. These tools help us understand which pages are useful and keep the website reliable. They do not include the height, weight, age, sex, or BMI values entered into our calculators.

BMI Tracker may display advertising to help keep the site free. If third-party advertising partners, including Google, are used, those partners may use cookies or similar technologies to serve and measure ads. Third-party vendors, including Google, may use cookies to serve ads based on a user's prior visits to this website or other websites.

Users can control cookies through their browser settings and can manage personalized advertising through Google Ads Settings. Where required by law, we will ask for consent before using non-essential cookies or similar technologies.

Children's privacy

Our site is intended for a general audience. While our child BMI calculator lets an adult enter a child's height and weight, those values are processed only in the browser and are never collected by us.

Your choices

You can use the calculators without providing any personal identity information. You can also control cookies through your browser settings.

Changes to this policy

We may update this policy from time to time. We will revise the effective date above when we do.

Contact

Questions about privacy? Email hello@bmi-tracker.com or visit our Contact page.