RAID Capacity Calculator

To calculate simple RAID capacity, enter how many disks will be used, the size in TB (terrabytes) of each drive and a RAID level. Then, click the Calculate RAID Capacity button.

Calculate Usable RAID Capacity


RAID Drive Requirements

Different RAID configurations require different numbers of physical disks.

  • RAID 0 requires 2 drives or more
  • RAID 1 is only valid for 2 drives
  • RAID 5 requires 3 drives or more
  • RAID 6 requires 4 drives or more
  • RAID 10 requires an even number of at least 4 drives
  • RAID 50 requires at least 6 drives
  • RAID 60 requires at least 8 drives