Data Storage converter
Terabytes to Gigabytes
If you need to know how many Gigabytes one Terabytes contains, the answer is 1,000. The conversion is linear, so 10 TB is 10,000 GB and 100 TB is 100,000 GB. Use the converter for any other value.
Formula 1 TB = 1,000 GB
Need the other direction? Gigabytes to Terabytes.
How to convert Terabytes to Gigabytes
A decimal terabyte is 10^12 bytes; a tebibyte is 2^40 bytes, about 9.95% more. A decimal gigabyte is 10^9 bytes; a gibibyte is 2^30 bytes.
To convert Terabytes to Gigabytes, multiply the value in TB by 1,000. For example, 10 TB × 1,000 = 10,000 GB. This works because the ratio between the two units is constant for every value in data storage.
Worked examples
| TB | GB |
|---|---|
| 1 TB | 1,000 GB |
| 2.5 TB | 2,500 GB |
| 5 TB | 5,000 GB |
| 10 TB | 10,000 GB |
| 25 TB | 25,000 GB |
| 50 TB | 50,000 GB |
| 100 TB | 100,000 GB |
Reverse conversion
| GB | TB |
|---|---|
| 1 GB | 0.001 TB |
| 5 GB | 0.005 TB |
| 10 GB | 0.01 TB |
| 25 GB | 0.025 TB |
| 50 GB | 0.05 TB |
| 100 GB | 0.1 TB |
When this conversion is useful
This is the calculation you need when you are sizing a backup, a download or a storage plan and the units are mixed. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 TB is 1,000,000 GB.
Is the conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
TB to GB conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Terabytes (TB) | Gigabytes (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 |
| 6 TB | 6,000 GB |
| 7 TB | 7,000 GB |
| 8 TB | 8,000 GB |
| 9 TB | 9,000 GB |
| 10 TB | 10,000 GB |
| 11 TB | 11,000 GB |
| 12 TB | 12,000 GB |
| 13 TB | 13,000 GB |
| 14 TB | 14,000 GB |
| 15 TB | 15,000 GB |
| 16 TB | 16,000 GB |
| 17 TB | 17,000 GB |
| 18 TB | 18,000 GB |
| 19 TB | 19,000 GB |
| 20 TB | 20,000 GB |
| 21 TB | 21,000 GB |
| 22 TB | 22,000 GB |
| 23 TB | 23,000 GB |
| 24 TB | 24,000 GB |
| 25 TB | 25,000 GB |
| 26 TB | 26,000 GB |
| 27 TB | 27,000 GB |
| 28 TB | 28,000 GB |
| 29 TB | 29,000 GB |
| 30 TB | 30,000 GB |
| 31 TB | 31,000 GB |
| 32 TB | 32,000 GB |
| 33 TB | 33,000 GB |
| 34 TB | 34,000 GB |
| 35 TB | 35,000 GB |
| 36 TB | 36,000 GB |
| 37 TB | 37,000 GB |
| 38 TB | 38,000 GB |
| 39 TB | 39,000 GB |
| 40 TB | 40,000 GB |
| 41 TB | 41,000 GB |
| 42 TB | 42,000 GB |
| 43 TB | 43,000 GB |
| 44 TB | 44,000 GB |
| 45 TB | 45,000 GB |
| 46 TB | 46,000 GB |
| 47 TB | 47,000 GB |
| 48 TB | 48,000 GB |
| 49 TB | 49,000 GB |
| 50 TB | 50,000 GB |
| 60 TB | 60,000 GB |
| 70 TB | 70,000 GB |
| 80 TB | 80,000 GB |
| 90 TB | 90,000 GB |
| 100 TB | 100,000 GB |
Frequently asked questions
How many Gigabytes are in 1 Terabytes?
1 TB equals 1,000 GB.
How do I convert Terabytes to Gigabytes?
Multiply the TB value by 1,000. Example: 25 TB = 25,000 GB.
What is 2.5 TB in GB?
2.5 TB = 2,500 GB.
Is the TB to GB conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.