The calculators work in your browser. We do not send your measurements to a server, create accounts, or store calculator inputs. Values reset when you reload the page. Copying and printing happen only when you choose those actions.
Hosting and external services
The hosting provider may process ordinary request information, including IP addresses and browser information, to deliver and secure the website. This version includes no analytics or advertising scripts and sets no cookies itself.
When you follow an affiliate link, the retailer may receive referral information and apply its own privacy and tracking policies.
Payments
If you choose to support this site, the checkout link takes you to a Stripe-hosted page. Stripe processes your payment and may collect billing and contact information. The site operator may receive payment status, contact details, and transaction information through Stripe. This website does not collect or store your card number.
Read Stripe’s privacy policy before making a payment. This static website does not verify payment status or create a purchase history.
Contact
If you email the operator using an available contact link, your email and message will be processed to respond. For payment inquiries, use the merchant contact information on your Stripe checkout or receipt. Do not include card details in email.