Privacy Policy
Last updated: 2026
Plain-language summary: the calculators run in your browser and we don’t collect personal information to use them. If advertising is enabled in future, third-party vendors may use cookies as described below.
Information we collect
The calculators work entirely in your browser and do not require an account. We do not collect names, emails, or personal details to provide the tools. If you email us, we receive the information you choose to send.
Cookies and local storage
The site may store your recent calculator inputs in your browser (local storage or the page URL) so you can revisit or share a project. This stays on your device and is not transmitted to us.
Third-party advertising
This site may in future display ads served by third-party vendors, including Google. Such vendors may 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. You can opt out of personalized advertising via Google Ads Settings, or opt out of third-party vendor cookies via aboutads.info. Advertising is not currently enabled on this site.
Analytics
We may use privacy-respecting analytics to understand aggregate, anonymous usage (such as which calculators are popular). This does not identify individual users.
Your choices
You can clear cookies and local storage in your browser at any time, and use browser privacy settings to limit tracking. Questions about this policy can be sent via our Contact page.