Raid Calculator
Free Raid Calculator for storage. Enter parameters to get optimized results with detailed breakdowns. Includes formulas and worked examples.
Reviewed by Daniel Agrici, Founder & Lead Developer
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
RAID 0: N×size | RAID 1: size | RAID 5: (N-1)×size | RAID 6: (N-2)×size | RAID 10: N/2×size
RAID combines disks for performance and/or redundancy. RAID 0=striping (fast, no redundancy). RAID 1=mirror. RAID 5=parity. RAID 6=double parity. RAID 10=mirror+stripe.
Worked Examples
Example 1: 4×2TB RAID 5
Problem:4 disks × 2TB each, RAID 5
Solution:Usable = (4-1)×2 = 6 TB, 75% efficiency
Result:6 TB usable (1 disk redundancy)
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy