Privacy policy
Quick answer
This site uses Google Analytics for aggregate traffic measurement and affiliate links that set cookies at the retailer. Email addresses are collected only when you submit a form, and are used only to reply or send what you asked for.
Analytics
This site uses Google Analytics to understand which pages are read and how people arrive. It records aggregate information such as page views, approximate location and device type. It is used to decide what to write next, not to identify individuals.
Calculators run locally
Every calculator on this site runs entirely in your browser. The numbers you enter are never sent anywhere, never stored and never logged. This is a static site with no server side processing of your input.
Affiliate links
Links to retailers carry a tracking identifier so that purchases are attributed to this site. Following one may cause the retailer to set a cookie on their own domain. That process is governed by the retailer privacy policy. This site receives aggregate commission reporting only, with no personal or order level detail about you.
Forms and email
If you submit the contact form or ask for a build list, your email address and message are delivered to [email protected] so they can be answered. They are used for that purpose and are not sold or passed to advertisers.
Your information
To ask what has been received from you, or to have it deleted, use the contact form. Since this site stores nothing beyond what you send, that is usually a short conversation.
Common questions
What data does this site collect directly?
Only what you type into a form. If you submit the contact form or request a build list, your email address and message are sent to the site owner so they can respond or send the list. There is no account system, no profile, and nothing is stored about you unless you chose to send it.
What do the calculators send?
Nothing. Every calculator runs entirely in your browser, and the values you enter are never transmitted anywhere. Nothing you type into a calculator is stored, logged or sent to this site or to any third party.
What do affiliate links do?
When you follow an affiliate link, the retailer records that you arrived from this site, usually with a cookie set on their domain, so that any resulting purchase is attributed correctly. That process is controlled by the retailer under their own privacy policy, and this site receives only aggregate commission reporting, never your identity or your order details.
How do I opt out of analytics?
Browser level tracking protection, an ad blocker, or a Do Not Track setting will all prevent the analytics script from loading, and the site works normally without it. No content, calculator or table is gated behind analytics.