Cookie policy
Last updated 4 September 2026
This page lists everything the site stores in your browser. It is a short list, because the calculators do their work on your device and do not need to track you to function.
What we store
| Name | Type | Purpose | Lifetime | Category |
|---|---|---|---|---|
ehe-cookie-consent | Local storage | Remembers whether you accepted or declined optional cookies, so the banner is not shown again. | Until you clear site data | Necessary |
ehe-tool-* | Local storage | Saves your last inputs on a calculator so they are pre-filled next time. Never sent to us. | Until you clear site data | Necessary (functional) |
_ga, _ga_* | Cookie | Google Analytics, only if analytics is enabled on the site and you accepted optional cookies. Counts visits and which tools are used, with IP anonymization. | Up to 13 months | Optional (analytics) |
Advertising cookies are not currently used. If advertising is introduced, the provider and its cookies will be added to this table before they are switched on, and they will stay off until you accept them.
Change your choice
Click the button below to forget your current choice. The consent banner will appear again on the next page load.
Browser controls
Every browser lets you view, block and delete cookies and site data. Blocking necessary storage will not break the calculators, but the consent banner will reappear on each visit and tools will not remember your inputs.
Questions
See the privacy policy for how we handle data in general, or reach us through the support page.