Cookie Policy
Last updated: 31 July 2026
Cookies are small text files placed on your device when you visit a website. They are widely used to make sites work, to remember preferences, and to measure and target advertising.
| Type | Purpose | Set by | Duration |
|---|---|---|---|
| Advertising | Serving and measuring ads, including ads based on your prior visits to this and other sites | Google and its partners | Varies by vendor |
| Analytics | Aggregate understanding of which pages are read and where visitors arrive from | Analytics provider | Typically up to 2 years |
| Local storage (not a cookie) | Remembering whether you chose metric or imperial units | This site | Until you clear site data |
Nothing you enter into the calculator is stored in a cookie or anywhere else. Your height, weight, age, sex, activity level and goal are used to do the arithmetic in your browser and are discarded when you close the page. The only preference we retain is your choice of units, and that stays on your device.
This site displays advertising served by Google. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this or other websites, which enables Google and its partners to serve ads to you based on your visits across the internet.
Following an Amazon affiliate link from this site may cause Amazon to set its own cookies, governed by Amazon's privacy notice rather than this policy.
Every major browser lets you view, block or delete cookies through its settings, usually under Privacy. Blocking all cookies may affect how some sites behave; on this site the calculator itself will continue to work, since it does not depend on them.
Questions about this policy can be sent via our contact page. See also our privacy policy.