What cookies and browser storage are
Cookies and local storage are small pieces of data that a website can save in your browser. Cookies are sent back to the website with each request; local storage stays in your browser and is only read by the page’s own scripts.
What this site uses
| Name | Type | Category | Purpose | Duration |
|---|---|---|---|---|
| btc-consent | Local storage | Necessary | Remembers your cookie choices so the banner is not shown on every page. | Until you clear site data or change your choice |
The site does not set any cookies of its own, and the calculator does not store your measurements anywhere.
Cookie categories
Necessary
Storage needed for the site to work as you expect. Currently this is only your consent preference. It cannot be switched off in the settings, because without it the site could not remember that you made a choice.
Analytics (optional, off by default)
Would cover services that measure how the site is used. No analytics service is installed.
Marketing (optional, off by default)
Would cover advertising or marketing services. No marketing service is installed.
If an analytics or marketing service is added in the future, it will only load after you have allowed that category, this policy will be updated, and you will be asked for your choice again.
Changing your preferences
You can review or change your choices at any time, including withdrawing consent you gave earlier.
You can also delete stored data for this site in your browser settings, or block local storage entirely. If you do, the banner will appear again on your next visit.
More information
See our Privacy Policy for how we handle information more generally.