TB to GB Converter
Convert terabytes to gigabytes instantly. One terabyte equals exactly 1,000 gigabytes. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert terabytes to gigabytes
Worked example: convert 128 terabytes to gigabytes. Using gigabytes ← terabytes × 1,000, we get 128 × 1,000 = 128,000 GB. To check the result, convert back: 128,000 GB ÷ 1,000 = 128 TB.
Terabytes to gigabytes chart
| 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 |
| 8 TB | 8,000 GB |
| 10 TB | 10,000 GB |
| 12 TB | 12,000 GB |
| 15 TB | 15,000 GB |
| 20 TB | 20,000 GB |
| 25 TB | 25,000 GB |
| 30 TB | 30,000 GB |
| 40 TB | 40,000 GB |
| 50 TB | 50,000 GB |
| 75 TB | 75,000 GB |
| 100 TB | 100,000 GB |
| 150 TB | 150,000 GB |
| 200 TB | 200,000 GB |
| 250 TB | 250,000 GB |
| 500 TB | 500,000 GB |
| 1,000 TB | 1,000,000 GB |
Gigabytes to terabytes (reverse)
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 1 GB | 0.001 TB |
| 2 GB | 0.002 TB |
| 5 GB | 0.005 TB |
| 10 GB | 0.01 TB |
| 20 GB | 0.02 TB |
| 50 GB | 0.05 TB |
| 100 GB | 0.1 TB |
| 250 GB | 0.25 TB |
| 500 GB | 0.5 TB |
| 1,000 GB | 1 TB |
About the terabyte and the gigabyte
A terabyte is 1,000 gigabytes in decimal, or 10^12 bytes. Modern external hard drives and SSDs are sold in terabytes.
A gigabyte is 1,000 megabytes in decimal; one GiB (gibibyte) is 1,073,741,824 bytes. Phone storage, RAM and mobile data plans are sold in GB.
One terabyte is 1,000 times the size of one gigabyte, so it takes fewer terabytes than gigabytes to express the same amount.
Everyday sizes in terabytes and gigabytes
| Everyday example (approximate) | In terabytes | In gigabytes |
|---|---|---|
| A 3-minute MP3 song | 0.000005 TB | 0.005 GB |
| A 2-hour HD movie | 0.003 TB | 3 GB |
| A Blu-ray disc | 0.025 TB | 25 GB |
| A big video game | 0.1 TB | 100 GB |
| A laptop SSD | 0.512 TB | 512 GB |
| An external hard drive | 2 TB | 2,000 GB |
Terabytes to gigabytes FAQ
How many gigabytes are in one terabyte?
One terabyte equals exactly 1,000 gigabytes. In the other direction, one gigabyte equals 0.001 terabytes.
How do I convert terabytes to gigabytes without a calculator?
convert 128 terabytes to gigabytes. Using gigabytes ← terabytes × 1,000, we get 128 × 1,000 = 128,000 GB. To check the result, convert back: 128,000 GB ÷ 1,000 = 128 TB. For a quick estimate, round the factor to 1,000. Then 128 TB is about 128,000 GB, compared with the exact 128,000 GB (an error of 0%). That is close enough for planning, but use the calculator above when the number matters.
What is a 3-minute MP3 song in gigabytes?
A 3-minute MP3 song is about 0.000005 terabytes, which is 0.005 gigabytes. Treat that as an approximate everyday figure rather than an official measurement.
Are the terabytes and gigabytes the same in every country?
Decimal TB = 10^12 bytes; binary TiB = 1,099,511,627,776 bytes. Decimal GB = 10^9 bytes; binary GiB = 1,073,741,824 bytes, which is why a "500 GB" drive shows about 465 GB in Windows.