Terabytes to Gigabytes Converter
One Terabyte equals 1000 Gigabytes (1 TB = 1000 GB). Multiply a Terabyte value by 1000 to get the equivalent in Gigabytes. The calculator is above; the formula and worked examples are below.
Formula
GB = TB × 1000
Multiply the Terabyte value by 1000 to get the equivalent value in Gigabytes.
Example Conversions
1 Terabyte (TB)
1000 Gigabyte (GB)
5 Terabyte (TB)
5000 Gigabyte (GB)
10 Terabyte (TB)
10000 Gigabyte (GB)
25 Terabyte (TB)
25000 Gigabyte (GB)
100 Terabyte (TB)
100000 Gigabyte (GB)
Conversion Table
| Terabyte (TB) | Gigabyte (GB) |
|---|---|
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |
How to Convert Manually
Use these steps to convert Terabyte values to Gigabyte without the calculator.
- Write down the value in Terabyte (TB) that you want to convert.
- Multiply that value by 1000.
- For example, 10 Terabytes × 1000 = 10000 Gigabytes.
- Label the result as Gigabyte (GB).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Terabyte and one Gigabyte.
About Terabyte and Gigabyte
The terabyte is an SI decimal data unit equal to exactly 1,000 gigabytes, or one trillion bytes. Drives, backup systems, and media libraries are commonly terabyte-scale. The gigabyte is an SI decimal data unit equal to exactly 1,000 megabytes, or one billion bytes. Device storage and mobile data plans are commonly sold in gigabytes. One Terabyte equals 1000 Gigabytes (1 TB = 1000 GB). Terabyte is used in hard drive and SSD capacity and in backup and archive storage. Gigabyte is used in phone and laptop storage.
Precision and Rounding:This converter keeps SI decimal prefixes (1 KB = 1,000 bytes) separate from IEC binary prefixes (1 KiB = 1,024 bytes). Match the symbol used by your source before converting because some operating-system interfaces display binary quantities with decimal labels.
See our guide to megabits vs. megabytes if you're unsure which one your download speed is quoted in.
Data units follow NIST guidance: decimal SI prefixes use powers of 1,000, while IEC binary prefixes use powers of 1,024 (reference).
Worked Example
15Terabytes equals15000Gigabytes.
15 TB × 1000 = 15000 GB
FAQ
How do I convert Terabyte to Gigabyte?
Multiply the Terabyte value by 1000 to get the equivalent value in Gigabytes.
What is the formula for Terabyte to Gigabyte?
The formula is GB = TB × 1000.
How many Gigabytes are in 1 Terabyte?
1 Terabyte equals 1000 Gigabytes.
Can I convert Gigabyte back to Terabyte?
Yes. 1 Gigabyte equals 0.001 Terabytes, and the related converter can reverse the calculation.
What are common names for Terabyte and Gigabyte?
Terabyte is shown as TB and may also be searched as terabytes, tb, decimal terabyte. Gigabyte is shown as GB and may also be searched as gigabytes, gb, decimal gigabyte.
Was this page helpful?
Let us know if this converter met your needs.