Overview
This site provides free calculators and reference content. We collect as little as possible and nothing we do not need.
Calculators
Every calculation runs in your browser. The dimensions you enter are never sent to our servers. Your unit preference (inches or centimetres) is stored in your browser's local storage so the other calculators can use it; you can clear it at any time through your browser settings.
Contact form
When you send a message we store your name, email address, subject, message and IP address so we can reply and filter abuse. We keep messages for up to twelve months and do not share them.
Analytics and advertising
If analytics or advertising scripts are enabled on this deployment, they may set cookies and collect usage data under their own policies. Where the law requires it, you will be asked for consent before any such script loads.
Server logs
Our hosting provider records standard web server logs (IP address, user agent, requested page, timestamp) for security and troubleshooting. Logs are rotated automatically.
Your rights
You may ask what personal data we hold about you and request that it be corrected or deleted. Use the contact form.
Changes
We will update this page if our practices change. The date at the top reflects the latest revision.