About StorageMath.org

StorageMath.org is a free, simple, and fast online calculator built specifically for storage professionals, system administrators, and IT engineers. Whether you're converting data units, calculating RAID capacity and overhead, estimating data transfer times, or planning storage capacity for your next project — this tool has you covered.

No ads cluttering your screen. No complex interfaces. Just straightforward calculations that work.

After 15++ years of working with enterprise storage solutions across EMC, Dell, HPE, IBM, NetApp, and Pure Storage platforms — one frustration kept coming back: doing quick storage math shouldn't require a spreadsheet, a calculator app, and three browser tabs.

Here's what my typical day looked like:

• Customer asks: "How long will it take to migrate 50TB over 10Gbps link?" — I'd open a calculator, convert units, account for overhead, and hope I didn't mess up the decimal places.
• Capacity planning meeting: "What's the usable capacity of a RAID 6 configuration with 12 x 4TB drives?" — More mental math, more chances for errors.
• Quick Slack message: "Is 1 TiB the same as 1 TB?" — Explaining binary vs decimal units for the hundredth time.
• Migration planning: "We have a 2-hour maintenance window. How much data can we realistically move?" — Back to the calculator.

I've dealt with these calculations thousands of times — during late-night troubleshooting calls, in customer meetings, while designing SAN architectures, and when planning multi-petabyte migrations. Every time, I wished there was a single, reliable tool that understood storage the way storage engineers think.

So I built one.