RAID Calc2

Understand your RAID before you build it.
RAID Calculator gives you quick, accurate estimates of usable capacity and redundancy for common RAID levels. Whether you’re planning a homelab, sizing storage for a small office, or just learning how RAID works, this simple calculator helps you reason about your arrays in seconds.
Features
• Supports common RAID levels (e.g., RAID 0, 1, 5, 6, 10)*
• Enter disk size and disk count to see usable capacity
• See how many drive failures your configuration can tolerate
• Works completely offline – no accounts, no analytics, no ads
• Clean, focused UI with instant results
Privacy-friendly by design
All calculations run locally on your device. RAID Calculator doesn’t collect personal data, use trackers, or send your RAID configurations anywhere.
Who is it for?
• Homelab and NAS enthusiasts
• IT admins and sysadmins
• Students learning about storage and redundancy
• Anyone who wants a quick RAID sanity check
Plan your arrays with more confidence and less guesswork.