Convert data sizes from Gigabytes up to Terabytes.
Last updated: August 2026
Convert Gigabytes to Terabytes (GB to TB)
As file sizes, 4K videos, and modern video games continue to grow, we are increasingly measuring data in Terabytes instead of Gigabytes. Use this calculator to accurately convert your storage limits and file sizes into TB.
The 1024 Rule
Because computers process data in binary (base-2), memory is always scaled in multiples of 1024 rather than 1000. Our calculator respects this fundamental architecture, ensuring your conversions exactly match what you see on your operating system.
The Formula
Terabytes = Gigabytes ÷ 1,024
Gigabytes = Terabytes × 1,024
Worked Example
1,024 GB ÷ 1,024 = 1 TB
3,072 GB ÷ 1,024 = 3 TB
500 GB ÷ 1,024 ≈ 0.488 TB
1.5 TB × 1,024 = 1,536 GB
Binary vs. Decimal: Why the Numbers Sometimes Don't Match
This is the single biggest source of confusion in storage conversions. This calculator - like your operating system - uses binary math, where 1 TB = 1,024 GB. Hard drive and SSD manufacturers, on the other hand, almost always advertise capacity using decimal math, where 1 TB = 1,000 GB flat. That's why a drive sold as "2TB" typically shows up as roughly 1.82 TB once you plug it into your computer - both numbers are "correct," they're just using different definitions of the terabyte.
Frequently Asked Questions
Using the binary computing standard this calculator uses, there are 1,024 Gigabytes (GB) in one Terabyte (TB).
Divide your Gigabyte value by 1024. For example, if you have 3072 GB of data, dividing by 1024 tells you that you have exactly 3 TB.
A 1 TB drive can hold roughly 250,000 photos, 250 hours of HD video, or several million typical document pages, though actual capacity varies a lot with file size and format.
Drive manufacturers advertise capacity using decimal math (1 TB = 1,000 GB = 1,000,000,000,000 bytes), while your operating system typically calculates and displays free space using binary math (1 TB = 1,024 GB = 1,099,511,627,776 bytes). The same physical drive shows a smaller number under the binary convention - a 2TB drive typically displays as roughly 1.82 TB in Windows or macOS, which is expected and not a defect.
This calculator uses the binary (1024-based) convention, matching how most operating systems calculate and display file and drive sizes. If you need decimal (1000-based) figures to match a manufacturer's advertised capacity, divide your GB value by 1000 instead of 1024 per step.
The International Electrotechnical Commission (IEC) defines Gibibyte (GiB) and Tebibyte (TiB) as the technically correct terms for binary (1024-based) units, reserving GB/TB for decimal (1000-based) values. In practice, most software and operating systems still label binary sizes as GB/TB rather than GiB/TiB, which is the source of most of the confusion.
Multiply your Terabyte value by 1024. For example, 2.5 TB × 1024 = 2,560 GB.
Yes, though double-check which convention your specific provider uses in their pricing page - most consumer cloud storage plans (Google Drive, Dropbox, iCloud) use decimal (1000-based) GB/TB to match marketing conventions, similar to hard drive manufacturers.
