Privacy policy

Updated November 9, 2026.

Do you store the numbers I type?

No. There are no accounts, and the calculators work out every answer on your own device. We don't send the numbers you type to our servers or keep them. They do appear in the page address, so that a link you copy or share opens with the same numbers; anyone you send the link to can see them.

Who is responsible for your data

SimplyCalculators is run by ADTECHLAB LTD, a company registered in England and Wales (company number 12578326, VAT number GB377381757). Registered office: 203 West Street, Fareham, Hampshire, England, PO16 0EN. Email: [email protected].

ADTECHLAB LTD is the "controller" of the little personal data this site handles. Write to [email protected] with any question about this policy or your data.

What we collect, and why

Technical request data, handled by our host

When you open a page, our host, Cloudflare, receives the technical details every website gets, such as your IP address, browser type and the page asked for. Why: to deliver pages and protect the site from attacks and abuse, based on our legitimate interest in a working, secure site. How long: short-lived security and performance records, kept by Cloudflare under its privacy policy. We don't use them to profile visitors.

"Was this helpful?" answers

We add one to the Yes or No total for that page and store only the page and the two totals: no IP address, no cookie and nothing else about you, so this isn't personal data. Why: to see which pages need improving. How long: as long as the page exists.

Emails you send us

Why: to reply and to fix any mistake you report, based on our legitimate interest in answering you. How long: until the matter is closed, then up to 12 months in case you follow up.

Advertising data, collected by Google

Why: to show the ads that pay for the site. Where the law requires it, Google asks for your consent first (see Advertising below). How long: set by Google; see how Google uses cookies.

We don't run visitor analytics and we don't sell personal data. You never have to give us personal data to use the calculators, and we make no automated decisions about you. The site is served only over an encrypted connection (HTTPS).

What stays in your browser

Your browser keeps a few small notes for this site only, using local storage rather than cookies: the calculators you used recently or saved with the star, and whether you've answered "Was this helpful?" on a page. They stay on your device and are never sent to us. You can delete them at any time by clearing this site's data in your browser. The cookie policy lists each one.

Advertising

We show ads from Google AdSense to keep the calculators free. Ads load a moment after the page opens and never change a result.

• Third-party vendors, including Google, use cookies to serve ads based on your previous visits to this website or other websites.
• Google's use of advertising cookies lets it and its partners serve ads to you based on your visits to this site and other sites on the internet. Google explains this in how Google uses information from sites that use its services.
• You can opt out of personalized advertising in Google's Ads Settings, or opt out of some other vendors' cookies at aboutads.info.

Visitors in the UK, the European Economic Area and Switzerland are asked for consent first, through Google's own consent tool, and can change their choice at any time from the link it adds to the page. Visitors in US states with privacy laws can opt out of their information being sold or shared for advertising from the same tool.

Who else handles data

Only two companies process data for this site: Cloudflare, which hosts it, and Google, which provides the ads. Both may process data in the United States and other countries. For data from the UK, both rely on the UK Extension to the EU–US Data Privacy Framework, as Cloudflare and Google explain.

Your rights

Under UK data protection law (the UK GDPR), you can ask us to:

• give you a copy of the personal data we hold about you;
• correct it, or delete it;
• limit how we use it, or stop using it where we rely on our legitimate interests;
• send it to you or another organization in a common format.

Where we rely on your consent, you can withdraw it at any time. Visitors in US states with privacy laws have similar rights to know about, delete and opt out of the sale or sharing of their information. Email [email protected] and we'll reply within one month. Because we hold so little, the answer is often that we hold nothing about you.

If you're unhappy with how we've handled your data, you can complain to the Information Commissioner's Office, the UK regulator. We'd appreciate the chance to put things right first.

Children

The site is for a general audience and isn't aimed at children under 13. We don't knowingly collect personal data from children.

Changes

If this policy changes, the date at the top changes too. If a change matters, such as a new kind of data, we'll say so here.