Privacy Policy

Updated October 17, 2026

Calculator measurements

The two free calculators run in your browser. The application does not upload the dimensions you enter, send them to a calculation API, or save your plan to an account. This release keeps measurements only in the current page; refreshing it resets the inputs. You can copy results yourself if you want to keep them.

Website delivery

The hosting and security providers process ordinary requests, including IP address, requested URL, browser information and timestamps, to deliver and protect the site. Their infrastructure logs are subject to their own retention practices. The calculator application currently includes no advertising pixels, analytics tags, payment cookies, login, mailing-list signup or third-party calculation service.

Contact messages

If you email 15564412316@163.com, your email address, message and any attachments you choose to send are processed through the operator’s email provider to handle the request. Include only the information needed. Do not send passwords, payment-card numbers or identity documents.

Requests and external links

Contact the same address for access, correction or deletion requests concerning information you sent to support. Requests are handled subject to applicable law and necessary record retention. We cannot erase files you copied or saved on your own device. External reference sites have their own privacy policies.

Payments and future changes

No checkout, payment processing or paid PDF delivery is enabled in this release. Any later payment or analytics functionality will need an updated notice before it is introduced.