Privacy policy

Last updated: November 12, 2026

What this site collects

• No accounts. This site does not ask you to sign up, and it never asks for payment details.
• The contact form. The only form is the contact form, which runs on Google Forms. What you type there, including an email address if you choose to give one, is sent to Google and to the publisher of this site. It is used only to read and answer your message. See Google's privacy policy.
• Calculators run in your browser. The numbers you type into a calculator are not sent to this site.
• Server logs. The site is hosted on Cloudflare. Like any web host, Cloudflare processes technical data for each request, such as IP address, browser type and the page requested, to deliver pages and to protect against abuse. See Cloudflare's privacy policy.

This site sets no advertising cookies and runs no advertising trackers.

Links to providers

Some links to providers are affiliate links. When you follow one, the provider or its affiliate network may set a cookie in your browser so that a later purchase can be linked to this site. That cookie is set and controlled by the provider or the network, under their own privacy policies. This site does not receive your name, email address or payment details from them.

Changes

If this site adds analytics, an email list or any other feature that collects data, this page will be updated before the feature goes live.

Contact

Use the contact form.