RAID Calculator & RAID Guide

Calculate capacity: RAID Calculator
Learn basics: What is RAID?
Compare RAID: RAID 5 vs RAID 6
Choose setup: Recommended Setup

Easily calculate usable storage for RAID 0 / 1 / 5 / 6 / 10, and learn RAID basics with simple explanations.

Perfect for NAS, servers, and custom PC storage planning.

What You Can Do on This Site

Enter disk count, size, and RAID level to instantly see usable capacity.

Learn RAID basics, differences between RAID levels, and how to choose the right configuration.

Learn how RAID capacity works with simple formulas and examples.

Compare performance, fault tolerance, and rebuild behavior.

Find the best RAID level depending on your needs.

After choosing RAID, check the best NAS and HDD combinations. Includes beginner to advanced setups.