The calculator
The calculator runs entirely in your browser. The values you enter are not transmitted anywhere. Your tank size, preferred units and last target blend are saved in your browser's local storage so the tool remembers them next time — that data stays on your device and contains nothing identifying.
Share links
A share link encodes calculator inputs only. It contains no vehicle, customer, order or account reference of any kind.
Location
The station finder will ask for your location only when you tap "Use my location," never on page load. You can use the site entirely without granting it. We do not retain precise location history, and location is never sent to analytics.
Analytics
We use Google Analytics 4 to count which tools get used, so we know what to improve. It is loaded after the page is usable and never before, so it cannot slow the calculator down, and the site works normally if you block it.
What is sent
Only the shape of what you did, never what you entered. For example: that a blend was calculated, which target blend and which mode, whether you used gallons or liters, that a station search happened, the search radius, how many results came back, and which outbound link was clicked.
What is never sent
- Your location. Coordinates from “Use my location” are used in your browser to sort stations and are never transmitted to analytics.
- Your full ZIP code. Only the first three digits are recorded, which identifies a region rather than a neighbourhood.
- Your tank size, volumes, or any number you type.
- Any name, email address, order, vehicle or account reference.
This is enforced in one place in the code: analytics parameters pass through an allow-list, and anything not explicitly permitted is discarded before it can be sent.
Consent
If you are in the EEA, the UK or Switzerland, nothing analytics-related loads until you choose. Elsewhere, analytics loads by default and you can block it with any content blocker or by turning on Global Privacy Control — we honour both GPC and Do Not Track as a refusal, and load nothing at all when either is set.
Advertising and personalisation storage are disabled outright, and Google Signals (cross-device and demographic joining) is turned off. We do not run ads on this site and we do not sell or share data.
Changing your mind
Your choice is stored in your browser under pbd_consent_v1. Clearing site
data for ethanolcalculator.com resets it.