Terabyte to Gigabyte Converter (TB to GB)
1 terabyte equals 1000 gigabytes — multiply the number of terabytes by 1000 to convert to gigabytes. This decimal (SI) definition is the one used by drive manufacturers, hosting plans and mobile data allowances, so a 2 TB disk is marketed as 2000 GB.
The formula
To convert terabytes to gigabytes, multiply by the exact factor 1000:
GB = TB × 1000
For example, 4 TB × 1000 = 4000 GB. To reverse it, divide gigabytes by 1000 (or multiply by 0.001).
Conversion table
| Terabytes (TB) | Gigabytes (GB) |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |
How to convert online
Type the number of terabytes in the first box and read the gigabytes instantly in the second. Enter a gigabyte value instead to convert back — it works both ways — then copy the result or scan the reference table.
Use the Terabyte to Gigabyte Converter — free and instant in your browser.
Where this conversion is needed
TB-to-GB conversions come up when you compare drive capacities, size cloud backups, plan hosting quotas or estimate how many gigabyte-scale files fit on a multi-terabyte disk. Because storage vendors advertise in decimal terabytes, converting to gigabytes makes it easy to sanity-check what a plan actually holds.
FAQ
How many gigabytes are in a terabyte?
One terabyte equals 1000 gigabytes. Multiply terabytes by 1000, so 10 TB = 10000 GB.
What is the formula to convert TB to GB?
GB = TB × 1000. The converter applies this exact factor automatically, so you never round by hand.
How do I convert gigabytes back to terabytes?
Divide by 1000, or multiply by 0.001. So 5000 GB = 5 TB.
Is the conversion exact?
Yes, in decimal (SI) units it is exact: 1 TB = 1000 GB. Note that some operating systems report storage in binary units (1 TiB = 1024 GiB), which is why a drive can look slightly smaller once installed.
Related converters
- Gigabyte to Terabyte Converter
- Terabyte to Megabyte Converter
- Terabyte to Kilobyte Converter
- Terabyte to Byte Converter
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Recommended reading
Terabyte to Petabyte Converter (TB to PB)
1 terabyte equals 0.001 petabytes. See the TB to PB formula, a table of common values, and convert instantly in your browser.
Terabyte to Megabyte Converter (TB to MB)
1 terabyte equals 1,000,000 megabytes. See the TB to MB formula, a table of common values, and convert instantly in your browser.
Terabyte to Kilobyte Converter (TB to KB)
1 terabyte equals 1,000,000,000 kilobytes. See the TB to KB formula, a table of common values, and convert instantly in your browser.
Terabytes to Bytes (TB to B) Converter
1 terabyte equals 1,000,000,000,000 bytes. Learn the exact formula, a conversion table, and convert TB to bytes instantly online.