What this site sets
| Type | Purpose | Duration | Consent |
|---|---|---|---|
| Strictly necessary | Security, load balancing and remembering that you dismissed a notice | Session or short-lived | Not required |
| Tool session storage | Remembering the email address you gave for one calculator so the next one does not ask again | Until you close the tab | Not required — it is doing what you asked |
| Analytics | Understanding which pages are useful and where people get stuck | Up to 26 months | Required |
| Advertising | None set | — | — |
| Third-party tracking | None set | — | — |
We do not set advertising pixels, cross-site identifiers or retargeting tags. There is nothing on this site that follows you elsewhere.
How to change your choice
Where we ask for analytics consent, you can change or withdraw it at any time through the cookie controls on this site. Withdrawing consent stops further collection; it does not retroactively delete what was collected while consent was in place, though you can ask us to delete that too.
You can also control cookies in your browser directly — every major browser lets you block or delete them. Blocking strictly necessary cookies may stop parts of the site working, which is an unavoidable consequence rather than a design choice.
The tool session storage is not tracking
When you give an email address for one calculator, we store it in your browser's session storage so the next calculator does not ask again. It never leaves your browser except in the request you initiate, it is cleared when you close the tab, and it is not used to identify you elsewhere.