Privacy policy
This policy describes the site as it stood on 27 September 2026.
Who we are
standarddeviationcalculator.net is a free collection of statistics, maths and finance calculators, with guides explaining the methods behind them. It is maintained by the site's editorial team (see the about page). There are no accounts, no sign-up and no mailing list.
What we collect, and what we do not
We collect:
- Visit statistics, through Google Analytics, described under analytics and cookies below.
- Standard request logs kept by our hosting provider, described under hosting and logs below.
We do not:
- collect the numbers or text you type into a calculator;
- ask for your name, email address or any other contact details;
- offer accounts, logins or comments;
- sell, rent or trade any data about visitors.
Calculators and your data
Every calculator runs as JavaScript in your own browser. The values you type are processed
on your device and are not sent to our servers or anyone else's, and they are not stored:
the site does not use cookies, localStorage, sessionStorage or
any other browser storage for calculator inputs, so they are gone when you close or reload
the page.
Two details worth knowing:
-
Links with data in them. Calculators can be prefilled from the address,
for example
/?q=2,4,4,5, so a result can be shared as a link. The site never adds your data to the address by itself. But if you open or share a link that already contains values, those values are part of the page address, and like any page address they reach our host's request logs and Google Analytics. Do not put anything sensitive in a link you share. - Copy results. Where a calculator offers to copy its results, the text is written to your device's clipboard only.
Analytics and cookies
We use Google Analytics 4 to count visits and see which pages are used. It is loaded only
on the live site. Google Analytics sets first-party cookies (named _ga and
_ga_…) to tell a returning browser from a new one, and records the usual
page-level information: the page address, the referring page, your browser and device
type, screen size, language, and an approximate location derived from your IP address.
It does not receive what you type into a calculator, except in the case of a link that
already carries values, as described above.
Google processes this data under its own terms; see Google's privacy policy. These are the only cookies the site sets.
Pages also load a typeface from Google Fonts, so your browser requests it from Google's servers, which receive your IP address and browser details as part of that request. Google Fonts does not set cookies.
Advertising. The site does not currently show ads, and no advertising
scripts are loaded. An ads.txt file is published in advance for Google
AdSense. If ads are introduced, this policy will be updated before they appear, to describe
the cookies and data they involve.
Hosting and logs
The site is a set of static files served by Cloudflare. To deliver pages and protect the site from abuse, Cloudflare processes technical information about each request, such as your IP address, the page requested, the time, and your browser's user agent, and may keep request logs for security and performance purposes. See Cloudflare's privacy policy. The site has no server of its own that stores anything you submit, because nothing is submitted.
Children
The calculators are suitable for students of any age, and the site does not knowingly collect personal information from anyone. Because there are no accounts or forms, a child using the site provides no more information than the visit statistics and request logs described above.
Your choices
- Block or delete cookies in your browser settings. Every calculator works without them.
- Opt out of Google Analytics on every site with Google's opt-out browser add-on, or with any content blocker that blocks analytics scripts. Nothing on this site depends on analytics working.
- Do Not Track. The site does not currently respond to the browser's Do Not Track signal, and Google Analytics does not act on it either. Use the add-on or a content blocker above if you do not want to be counted.
Changes to this policy
If what the site collects changes, for example if advertising is added, this page will be updated before the change takes effect, and the date at the top will change with it.
Contact
Questions about this policy: see the about page.