Privacy Policy
This policy explains what data CalculatorPlus does and does not collect.
Calculations Stay on Your Device
Every calculator on this site runs entirely in your browser using JavaScript. The numbers you type into a calculator are never transmitted to us or to anyone else, and they are not stored — closing or refreshing the page discards them.
Analytics and Advertising
To keep CalculatorPlus free, we use Google Analytics to understand which calculators are used, and Google AdSense to display advertising. Both may set cookies on your device.
Google Analytics uses cookies to measure traffic and aggregate usage patterns; we use it to see which tools are popular, not to identify you personally. Google AdSense and its third-party vendors use cookies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visits to our site and other sites on the internet.
You can opt out of personalized advertising at any time through Google Ads Settings (adssettings.google.com), and you can opt out of many third-party vendors' cookies at aboutads.info. Where the law requires it — for example under the GDPR in Europe or the CPRA in California — we ask for consent before non-essential cookies are set, and you can manage or withdraw consent through your browser settings.
We do not sell personal information, and we never build advertising profiles from the values you type into a calculator. For a full breakdown of the cookies we use, see our Cookie Policy.
Contacting Us
If you email us through the contact form, we use your message and email address only to reply to you and, where relevant, to fix a reported error. We do not add you to a mailing list.
Your Data Rights
Depending on where you live, you may have the right to access, correct or delete personal data we hold about you, and to object to or restrict certain processing. Because our calculators run entirely in your browser, the only personal data we typically hold is anything you send us by email through the contact form. To make a request, contact us and we will respond within a reasonable time.
This site is not directed at children under 13, and we do not knowingly collect personal information from them.
Looking for a different calculator?
CalculatorPlus has free tools across finance, construction, math, health and more — each one showing the formula and a worked example.