Last updated August 2026.
The short version
We do not ask you for personal information, and nothing you type into a calculator on this site leaves your browser. We do use analytics and third-party advertising, which set cookies.
Information you give us
Calculator inputs — dimensions, materials, region — are processed entirely in your browser using JavaScript. They are never transmitted to our servers or to anyone else, and we never see them.
If you email us, we hold your message and email address for as long as needed to deal with it. We do not add you to any mailing list.
Information collected automatically
Like most websites, our hosting and analytics collect standard technical data: IP address, browser type, device type, referring page, pages visited and time of visit. We use this in aggregate to understand which pages are useful and to keep the site working.
Cookies and advertising
This site displays advertising served by Google AdSense and its partners.
- Third-party vendors, including Google, 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 visit to this site and other sites on the internet.
- You may opt out of personalised advertising by visiting Google Ads Settings.
- You can opt out of some third-party vendors’ use of cookies for personalised advertising at aboutads.info/choices.
- For more on how Google uses data when you use our partners’ sites, see Google’s policy.
Your rights under GDPR and CCPA
If you are in the European Economic Area, the UK, or California, you have rights to access, correct and delete personal data we hold about you, and to object to certain processing. Because we hold almost none — we do not operate accounts, mailing lists or user profiles — in most cases there is nothing to retrieve. To make a request, email hello@benchcost.com.
Where consent is required for advertising cookies, a consent notice is presented before non-essential cookies are set, and you can change or withdraw your choice at any time.
Children
This site is not directed at children under 13 and we do not knowingly collect information from them.
External links
We link to external sources so you can check our figures. We are not responsible for the privacy practices of those sites.
Changes
We will update this page if our practices change, and revise the date at the top.
Contact
Questions about this policy: hello@benchcost.com.