Terabytes to Gigabytes (TB to GB)
1 TB = 1,000 GB
To convert terabytes to gigabytes: GB = TB × 1,000 (binary: GiB = TiB × 1,024)
| terabytes | gigabytes |
|---|---|
| 0.5 TB | 500 GB |
| 1 TB | 1,000 GB |
| 2 TB | 2,000 GB |
| 3 TB | 3,000 GB |
| 4 TB | 4,000 GB |
| 5 TB | 5,000 GB |
| 8 TB | 8,000 GB |
| 10 TB | 10,000 GB |
| 16 TB | 16,000 GB |
| 20 TB | 20,000 GB |
What Windows shows (binary GiB): 1 TB ≈ 931 GB, 2 TB ≈ 1,863 GB, 4 TB ≈ 3,725 GB, 8 TB ≈ 7,451 GB.
Storage is sold in SI decimal units, where a terabyte is 10¹² bytes and a gigabyte 10⁹ bytes, so 1 TB = 1,000 GB: multiply terabytes by 1,000. In binary units (IEC 80000-13, which Windows uses while still printing 'GB') 1 TiB = 1,024 GiB. This converter uses the decimal value drive makers and cloud plans quote.
Formula
GB = TB × 1,000 (binary: GiB = TiB × 1,024)
Example: 1.5 terabytes = 1,500 gigabytes.
Terabytes to Gigabytes chart
| terabytes | gigabytes |
|---|---|
| 0.25 | 250 |
| 0.5 | 500 |
| 1 | 1,000 |
| 1.5 | 1,500 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 8 | 8,000 |
| 10 | 10,000 |
| 12 | 12,000 |
| 16 | 16,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
Good to know
What a drive really shows: a 1 TB SSD holds 1,000,000,000,000 bytes. Windows divides by 1,024³ and calls the result GB, so it reports 931 GB. A 2 TB drive shows about 1,863 GB, 4 TB about 3,725 GB and 8 TB about 7,451 GB. Nothing is missing; it is the same bytes in a smaller unit. macOS and iOS count in decimal and show the full 1,000 GB.
Sizing a backup: 2 TB of cloud storage is 2,000 GB. A 512 GB laptop backs up into a quarter of a 2 TB drive; ten 128 GB phones fill 1.28 TB. For the other direction use GB to TB, and for every storage unit at once the data storage converter.
Video and photo libraries: one hour of 4K phone video is roughly 20-30 GB, so 1 TB holds about 33-50 hours. 1 TB holds about 250,000 photos at 4 MB each.
Frequently asked questions
How many GB is 1 TB?
1 TB is 1,000 GB in decimal units, which drive makers and cloud plans use. In binary units 1 TiB is 1,024 GiB.
How many GB is 2 TB?
2 TB is 2,000 GB (decimal), which Windows shows as about 1,863 GB.
Why does my 1 TB drive show 931 GB?
Windows counts in binary gibibytes but labels them GB: 10¹² bytes ÷ 1,073,741,824 bytes per GiB = 931.32. The capacity is the same.
Is 1 TB 1,000 GB or 1,024 GB?
1,000 GB in the SI units on the box. 1,024 is the binary figure: 1 TiB = 1,024 GiB.