Cookies are small files that a website stores in your browser to remember something between visits. Local storage (localStorage) is similar: it keeps data on your device, but the browser does not send it to the server.
This policy explains which ones calcular.eu uses, in accordance with article 22.2 of Spanish Law 34/2002 (LSSI-CE) and the cookie guidance of the Spanish Data Protection Agency.
Only first-party cookies and local storage needed for the website to work and remember your own choices. That is why they do not require your consent.
| Name | Type | Purpose | Duration |
|---|---|---|---|
| lang | First-party cookie | Remember the language you choose so the website opens in it | 1 year |
| cookies | First-party cookie | Remember whether you accept or reject optional cookies | 1 year |
| theme | Local storage | Remember the light or dark theme | Until you delete it |
| recientes | Local storage | Show the calculators you used recently on the home page | Until you delete it |
| calc-historial, calc-ans, calc-modo, calc-grados | Local storage | History and settings of the basic and scientific calculator | Until you delete it |
| calc_super_comparativa, rentaLib | Local storage | Lists you save in the price-per-kilo and retail profitability calculators | Until you delete it |
Whatever is kept in local storage never leaves your device.
Today calcular.eu uses no analytics, advertising or third-party cookies.
If any are added in the future, they will not be enabled until you accept them in the cookie banner, you will be able to reject them just as easily, and they will be listed in this table.
Icons and some libraries are downloaded from cdnjs (Cloudflare), which receives your IP but sets no cookies. The share buttons load nothing from social networks until you tap them. More details in the privacy policy.
You can change your choice at any time from “Cookie settings” in the footer of any page.
You can also delete the cookies and local storage of calcular.eu from your browser settings (in Chrome, Edge, Firefox and Safari, under privacy, “cookies and site data”). If you do, the website will go back to its default language and theme, and your history and saved lists will be lost.
Last updated: 12/10/2026