RAID Calculator

Click drive sizes to add them to your NAS, pick a RAID level, and tweak bay count.
Common HDD sizes0 added
Tip: Click a bay to remove that specific drive. Drives beyond your bay count won’t be added.
NAS Placeholder4 bays
4
HDD bays — click to remove a drive
Capacity breakdown
Drives in array
0
RAID level
JBOD
Raw capacity
0 TB
Usable capacity
0 TB
Overhead
—
Fault tolerance
0 drives
Notes
Add at least 1 drive.
Calculations assume TB (decimal). TiB shown for reference (1 TB ≈ 0.9095 TiB). Mixed sizes use smallest-disk math for RAID5/6/10. RAID1 returns the smallest disk capacity. SnapRAID uses whole-disk parity with largest disks chosen for parity by default.