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Convert terabytes to gigabytes
Instant, accurate TB → GB conversion with a live converter, table and formula.
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1 terabyte = 1000 gigabytes
1 gigabyte = 0.001 terabytes
terabytes to gigabytes table
| terabytes (TB) | gigabytes (GB) |
|---|---|
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
Formula
gigabytes = terabytes × 1000.
Example
10 terabytes = 10000 gigabytes.
What is a terabyte?
A terabyte (TB) is 1,000 gigabytes — a typical hard-drive size.
What is a gigabyte?
A gigabyte (GB) is 1,000 megabytes — a few hours of video.
Real-world reference points
A photo is a few MB; an MP3 song ~4 MB; an HD movie ~4 GB; a modern phone stores 128+ GB.
| Reference | terabytes | gigabytes |
|---|---|---|
| E-mail (text only) | 0 TB | 0.00002 GB |
| Smartphone photo | 0.000003 TB | 0.003 GB |
| MP3 song | 0.000004 TB | 0.004 GB |
| DVD capacity | 0.0047 TB | 4.7 GB |
| HD movie stream | 0.004 TB | 4 GB |
Mistakes to avoid with data conversions
- Megabits vs megabytes: your '100 Mbps' connection downloads at ~12.5 MB/s — ISPs quote bits, files are bytes.
- Decimal vs binary units: drives are sold in decimal GB (10⁹), so a '1 TB' drive shows ~931 'GB' (GiB) in Windows.
- Assuming video size scales with length only — resolution and bitrate matter more than minutes.
Frequently asked questions
How many gigabytes in a terabytes?+
1 terabyte = 1000 gigabytes.
How do I convert terabytes to gigabytes?+
Enter the value in the terabytes box above and the gigabytes value appears instantly. You can also type in the gigabytes box to convert the other way.
Is this TB to GB converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.