Editorial principles
- Publish the formula and units.
- Send vendor-specific questions to official tools.
- Do not promise unverified savings or drive life.
- Prefer original problem-solving guides over mass-generated pages.
Ads and tracking
The site is publicly hosted on Cloudflare Pages and is introducing Google AdSense advertising to help cover operating costs. It has no affiliate links, first-party analytics trackers, or user accounts. Advertising data practices are described in the privacy notice.
Calculation limits
CCTV results assume the entered average bitrate remains representative. RAID results assume equal-size drives and simplified array capacity. Filesystem metadata, bad-block reserves, and vendor allocations vary.
Questions and error reports
Use the contact page to view or copy the email address for calculation errors, missing explanations, accessibility problems, or other questions. Reproducible errors are verified and covered by a test before correction.
Corrections
Reproducible calculation errors receive a failing test before a code change. Last reviewed: August 27, 2026.