GB to TB Converter
Convert gigabytes to terabytes instantly — 1 TB = 1024 GB (binary). Explains why a 1 TB drive shows only 931 GB in Windows. Bidirectional.
About the GB to TB Converter
This free GB to TB converter uses the binary convention 1 TB = 1024 GB, the way Windows and most operating systems report storage. Enter gigabytes to see terabytes, or terabytes to get gigabytes — the conversion runs both ways as you type.
The GB/TB question usually comes up when sizing storage: how many 256 GB phones of photos fit on a 2 TB drive (eight), whether 500 GB of game installs fits alongside backups on a 1 TB SSD, or how much of a 6 TB NAS a 3,500 GB media library consumes. It also explains the classic mystery of the "missing" space on new drives.
Drive makers use decimal units (1 TB = 1,000 GB), while Windows counts in binary — that's why a retail 1 TB drive shows about 931 GB. The note under the result covers both standards.
How to Use the GB to TB Converter
- 1Enter a size in gigabytes — terabytes appear instantly.
- 2Or type terabytes to convert back to gigabytes.
- 3Copy the result, or check the table for common drive sizes.
Frequently Asked Questions
How many GB are in 1 TB?
In the binary convention used by Windows, 1 TB = 1024 GB. Drive manufacturers use the decimal standard where 1 TB = 1000 GB. This converter uses 1024, matching what your operating system reports.
Why does my 1 TB drive show only 931 GB?
The manufacturer counts 1 TB as 1,000,000,000,000 bytes, but Windows divides by 1024 three times, giving 931.32 "GB" (really GiB). No space is missing — the two sides just use different definitions of the same prefixes.
Is 500 GB half a terabyte?
Almost. In binary terms 500 GB is 0.4883 TB — half a terabyte would be 512 GB. In decimal terms 500 GB is exactly 0.5 TB. Either way, 500 GB holds roughly 100,000 photos at 5 MB each.
How many GB is 2 TB?
2 TB = 2048 GB in binary (or 2000 GB decimal). That's enough for about 500 hours of 1080p video at 4 GB/hour, or around 25 modern AAA game installs at 80 GB each.
What comes after terabytes?
The ladder continues: 1024 GB = 1 TB, 1024 TB = 1 PB (petabyte), then exabyte, zettabyte and yottabyte. Consumer drives now reach 20+ TB, while data centers measure storage in petabytes.