Convert GB to TB, Free
Type any GB value and see the TB result instantly. No button press needed.
How to convert GB to TB
Gigabytes (GB) and terabytes (TB) are the two most commonly used units when discussing hard drive capacity, cloud storage quotas, and backup sizes. One terabyte equals 1,024 gigabytes in binary convention (used by operating systems) or exactly 1,000 gigabytes in the SI decimal convention (used by drive manufacturers). This difference matters: a 1 TB drive marketed by the manufacturer contains 1,000 GB, but Windows may report it as roughly 931 GB.
This converter uses the binary convention (1 TB = 1,024 GB) because that is what your operating system reports when you check drive capacity. If you are working with storage vendor specifications, note that they typically use the decimal convention (1 TB = 1,000 GB).
Enter the gigabyte value
Type the number of gigabytes you want to convert. Decimal values like 512.5 or 2048 are both valid inputs.
Read the terabyte result
The converter divides your GB value by 1,024 and shows the result in TB, using the binary convention.
Note the convention used
If you are comparing to a drive's marketed capacity (decimal TB), multiply your binary TB result by 1.024 to get the equivalent decimal TB figure.
Use for planning
Apply the converted value to storage planning, backup estimates, or cloud cost calculations that quote prices per TB.
Frequently asked questions
How many GB are in one TB?
In the binary convention used by operating systems: 1 TB = 1,024 GB. In the SI decimal convention used by storage manufacturers: 1 TB = 1,000 GB. This mismatch explains why a '1 TB' hard drive appears as roughly 931 GB in Windows.
What is the difference between GiB/TiB and GB/TB?
GiB (gibibyte) and TiB (tebibyte) are the precise binary units: 1 TiB = 1,024 GiB exactly. GB and TB are technically decimal SI units. In everyday usage, most people and operating systems use GB/TB to mean the binary values, creating the manufacturer vs. OS reporting gap.
Why does my 1 TB drive show as 931 GB in Windows?
The drive manufacturer defines 1 TB as 1,000,000,000,000 bytes (decimal trillion). Windows divides that by 1,073,741,824 (binary GB = 2^30) to get 931 GB. Both figures describe the same physical storage; only the measurement convention differs.
What is 500 GB in TB (binary)?
500 GB / 1,024 = approximately 0.488 TB. This is roughly half a terabyte.
What is 2048 GB in TB?
2,048 / 1,024 = exactly 2 TB in binary convention. This is a common configuration for NAS drives and server builds.