Privacy Policy

The short version

• No accounts, no sign-up, no email collection.
• No advertising, no ad networks, no social embeds, no data sold or shared.
• Google Analytics, with no cookie until you consent. The tag is on every page but starts in a denied state: it sets no cookie and reads none until you press Allow analytics. Before that it sends only anonymous, cookieless pings.
• Your input values never leave your device — they are computed in JavaScript in your browser, and they are deliberately stripped out of what analytics sees.

What runs in your browser

ElectroCalculators is a static site. Each calculator page is plain HTML delivered from a CDN, with a small piece of JavaScript that performs the calculation locally. When you change an input, no request is made to any server — which is also why results appear instantly and why the calculators keep working if you lose your connection after the page has loaded.

Analytics

We use Google Analytics 4 to see which calculators people actually use, so the next one is built for a real need rather than a guess. It is the only third-party script on the site.

How it is installed. The Google tag is in the head of every page, in the standard form. Before it runs, every consent signal it understands — analytics storage, advertising storage, ad user data, ad personalisation — is set to denied. This is Google’s Consent Mode, and in the denied state the tag sets no cookie, reads no cookie, and cannot recognise you between visits or pages. It does still send a request to Google for each page you view, without an identifier; Google uses these cookieless pings only for aggregate, modelled counts. Pressing Allow analytics changes the analytics signal to granted, which lets the tag set its cookie. Pressing No thanks leaves it denied. The advertising signals are never granted, whatever you choose.

Until 4 September 2026 the site went further and loaded no tag at all before consent. It was changed because Google’s own tooling could not detect the tag and therefore could not confirm that measurement worked. The thing that needs your consent under UK and EU law — storage on your device — is still gated on your choice, and this page says exactly what happens before you make it.

Before you choose, or if you refuse, each cookieless ping carries:

• The page address, with the query string removed.
• Your device type, browser and screen size, and the referring site if any.
• Your IP address, as any web request does; Google derives a coarse location from it.
• A consent flag saying storage is denied — no cookie, no identifier.

If you allow it, Google additionally receives:

• A randomly generated identifier stored in a first-party cookie, so repeat visits are counted once rather than as new people each time.

Why the query string is stripped. Every calculator encodes its inputs into the URL so a result can be shared — the voltage, the current, the cable run, the load schedule. Sending the raw address would hand Google a copy of what you are designing. The path alone says which calculator was opened, which is the only thing we want to know, so that is all that is sent.

Advertising, remarketing and ad personalisation signals are switched off. Google acts as a data processor for this data; their handling of it is governed by the Google Business Data Responsibility terms.

Change your mind at any time

Data stored on your device

Two things are stored in your browser’s localStorage, and only ever read back by this site on your own device:

• Your theme preference — whether you chose light or dark, so the page does not flash the wrong colours on your next visit.
• Calculations you explicitly save — pressing Save stores the calculator name and your input values locally. Nothing is saved unless you press that button.
• Your analytics choice — whether you allowed or refused, so you are not asked again. Stored in localStorage rather than a cookie, because a cookie recording that you refused cookies would be absurd and would travel on every request.

None of these is transmitted anywhere. Clearing your browser’s site data removes all three.

Input values in the URL

As you change inputs, the address bar updates to encode them — that is what makes a result shareable. This happens entirely in your browser and creates no server request. Be aware, though, that if you share such a link, the values in it travel with it. If you paste a calculation into a public forum, treat the numbers in the URL as public.

Server logs

This site is served by a content delivery network. Like every web host, it processes standard request data — IP address, timestamp, requested URL, user agent — in order to deliver the page and to protect against abuse and denial-of-service attacks. We do not build profiles from these logs, do not use them for advertising, and do not combine them with any other data. They are retained by the CDN under its own operational retention policy.

Embedded calculators

Any calculator can be embedded in another site via an iframe. An embedded calculator behaves exactly like the page it came from: it computes locally, sends no input values anywhere, and carries the same Google tag in the same denied-by-default state, so it sets no cookie unless you have allowed analytics. If you meet one of our calculators on someone else’s site, that site’s own privacy policy governs everything outside the iframe.

Links to other sites

Calculator pages cite standards bodies, datasheets and reference texts. Following those links takes you to sites we do not control and whose privacy practices are their own.

Children

The site collects no personal information from anyone, of any age. There is nothing to collect it with.

Your rights

Regulations such as the UK GDPR, the EU GDPR and the CCPA give you rights of access, correction and erasure over personal data a service holds about you. We hold no account, no profile and no database of users. If you allowed analytics, the data Google holds is tied to a random identifier rather than to you by name; you can withdraw consent above, and clearing this site’s cookies removes the identifier. For anything else — including the CDN’s operational logs — write to [email protected].

Changes to this policy

If the tracking on this site changes, this page is updated in the same change that ships it — not afterwards.

4 September 2026: the Google tag moved into the head of every page, under Consent Mode with storage denied by default, as described above. Before this date no tag was loaded at all until you pressed Allow; from this date the tag loads but sets no cookie until you do. This page previously said “no script, no pixel, no ping” before consent, and that sentence was removed in the same change.

22 August 2026: Google Analytics 4 was added, behind the consent banner described above. Before that date the site ran no third-party script at all and this page said so.

Contact

Questions about this policy: [email protected]. See also the contact page.