Cookies
This site uses a Google measurement tool. Here is the detail and how to turn it off.
What a cookie is, and what it is not
A cookie is a file a site stores in your browser and that is sent back to the server on every visit. That is what makes it possible to follow you between pages or between sites.
localStorage is different: it stays on your device and is never sent
anywhere. What we store directly is all of this second kind.
What we store on your device
| Key | What for | Expires |
|---|---|---|
microtools:tema | Whether you prefer the light or dark theme | Until you clear it |
microtools:unidades | Whether you want metric or imperial units | Until you clear it |
microtools:moneda | The currency used to display amounts | Until you clear it |
microtools:recientes | The last tools you opened | Until you clear it |
microtools:consentimiento | Your answer to the cookie notice, so we stop asking | Until you clear it |
None of them can identify you. If you clear your browsing data they disappear and the site carries on working: you lose your display preferences and you get asked about cookies again.
Cookies and third-party services
This site can load Google Tag Manager, the tool used to manage visit measurement. It is a container: it analyses nothing by itself, but measurement tags loaded from it can use cookies or identifiers to find out how many people visit and which tools they use. It exists to decide what to build next, not to profile you and not to sell you anything.
Only if you accept
The first time you arrive, a notice appears with two buttons of the same size: Reject and Accept. Until you press Accept, your browser makes not a single request to Google. The container is not preloaded "just in case" and not loaded silently: it is simply not requested.
If you reject, or close the notice without deciding, nothing loads. There is no penalty: every tool works exactly the same.
You can change your mind at any time from , in the footer of any page. Withdrawing consent reloads the page to leave the browser clean, because simply switching a flag would not undo what has already loaded.
Without JavaScript the notice cannot work, so in that case the measurement does not load either. We would rather not measure than measure without having been able to ask.
Exactly what is sent
If you accept, alongside the page visited we send usage actions:
- That you actually completed a calculation, with the name of the tool.
- Whether you share, copy, export to CSV or print a result.
- What you type into the search box, together with how many results came back. That is what tells us which tools are missing, which is why we ask for it. It is sent when you stop typing, not letter by letter.
- That you sent a suggestion, and which type it was.
What is never sent is the figures you put into the calculators. Your salary, your mortgage, your energy use or your grades do not leave your browser even if you accept. Nothing that could identify you is sent either.
Other ways to block it
- With the Google Analytics opt-out add-on , which blocks it on every site you visit.
- By turning on Do Not Track or your browser's tracker blocking, which most now include by default.
- With any content blocker.
More information in Google's policies for partner sites .
What does not change: the calculations still run in your browser. The figures you enter are not sent to Google or to anyone else.
When advertising goes live
The plan is to fund the site with advertising so it stays free. When that happens:
- This page will be updated with the specific cookies the provider uses.
- The same consent notice will ask permission for advertising too, and without that permission it will not load.
- The calculations will still run in your browser. That is not going to change.
How to clear everything
From your browser settings, under privacy or browsing data. A private window works too: close it and nothing is left.
If you have questions, write to mymicrotoolscontact@gmail.com.
Updated on 27 August 2026.