How to convert gigabytes to terabytes
To convert gigabytes (GB) to terabytes (TB), multiply the value in gigabytes by 0.001.
TB = GB × 0.001 (decimal)
TB = GB × 0.0009765625 (binary)
Example: 5 GB = 0.005 TB, or 0.0048828125 TB in binary.
Decimal (SI) counting steps by 1,000 and is what drive makers, macOS and phones use. Binary counting steps by 1,024 and is what Windows and RAM use; its unambiguous IEC names are KiB, MiB and GiB. Bits are decimal either way.
You can also type 5 GB to TB into the smart calculator, or mix units: 1 GB + 1 TB.
Gigabytes to Terabytes conversion table
| Gigabytes | Terabytes (decimal) | Terabytes (binary) |
|---|---|---|
| 0.01 GB | 0.00001 TB | 0.000009765625 TB |
| 0.1 GB | 0.0001 TB | 0.00009765625 TB |
| 0.25 GB | 0.00025 TB | 0.00024414063 TB |
| 0.5 GB | 0.0005 TB | 0.00048828125 TB |
| 1 GB | 0.001 TB | 0.0009765625 TB |
| 2 GB | 0.002 TB | 0.001953125 TB |
| 3 GB | 0.003 TB | 0.0029296875 TB |
| 4 GB | 0.004 TB | 0.00390625 TB |
| 5 GB | 0.005 TB | 0.0048828125 TB |
| 6 GB | 0.006 TB | 0.005859375 TB |
| 7 GB | 0.007 TB | 0.0068359375 TB |
| 8 GB | 0.008 TB | 0.0078125 TB |
| 9 GB | 0.009 TB | 0.0087890625 TB |
| 10 GB | 0.01 TB | 0.009765625 TB |
| 12 GB | 0.012 TB | 0.01171875 TB |
| 15 GB | 0.015 TB | 0.014648438 TB |
| 20 GB | 0.02 TB | 0.01953125 TB |
| 25 GB | 0.025 TB | 0.024414063 TB |
| 30 GB | 0.03 TB | 0.029296875 TB |
| 40 GB | 0.04 TB | 0.0390625 TB |
| 50 GB | 0.05 TB | 0.048828125 TB |
| 60 GB | 0.06 TB | 0.05859375 TB |
| 75 GB | 0.075 TB | 0.073242188 TB |
| 100 GB | 0.1 TB | 0.09765625 TB |
| 250 GB | 0.25 TB | 0.24414063 TB |
| 500 GB | 0.5 TB | 0.48828125 TB |
| 1,000 GB | 1 TB | 0.9765625 TB |
Converting terabytes back to gigabytes
1 TB = 1,000 GB. See the Terabytes to Gigabytes converter, or press the swap button above.
About the units
Gigabyte (GB)
In decimal mode 1,000,000,000 bytes (1,000 MB); in binary mode 1,073,741,824 bytes (1,024 MB).
Terabyte (TB)
In decimal mode 1,000 GB, which is how drives are sold; in binary mode 1,024 GB.
Digital storage is counted in bits and bytes (1 byte = 8 bits). There are two ways to count bytes. Decimal (SI) prefixes step by 1,000: 1 KB = 1,000 B and 1 GB = 1,000 MB, which is how drive makers, macOS, iOS and Android report sizes. Binary prefixes step by 1,024: 1 KB = 1,024 B and 1 GB = 1,024 MB, which is how Windows and RAM count (the IEC names for these are KiB, MiB and GiB). Bits are always decimal: 1 Kb = 1,000 b.
Questions and answers
How many terabytes are in a gigabyte?
One gigabyte (GB) equals 0.001 terabytes in decimal (SI) counting, or 0.0009765625 terabytes in binary counting (1 KB = 1,024 B), which Windows uses.
How do I convert gigabytes to terabytes?
To convert gigabytes to terabytes, multiply the value in gigabytes by 0.001. The formula is TB = GB × 0.001. For example, 5 GB = 0.005 TB.
What is 5 GB in TB?
5 gigabytes is 0.005 terabytes.
Which is bigger, a gigabyte or a terabyte?
A terabyte is bigger: 1 TB = 1,000 GB.
Is 1 GB equal to 1,000 MB or 1,024 MB?
Both are in use. In decimal (SI) counting, which drive makers, macOS, iOS and Android use, 1 GB = 1,000 MB. In binary counting, which Windows and RAM use, 1 GB = 1,024 MB; the unambiguous IEC name for that size is the gibibyte (GiB). ConvertEasy has a Decimal / Binary switch so KB, MB, GB and TB follow whichever you need, while KiB, MiB and GiB are always binary.
Are kilobits 1,000 or 1,024 bits?
ConvertEasy treats bits as decimal in both modes: 1 Kb = 1,000 b, 1 Mb = 1,000 Kb. A byte is always 8 bits, so only byte units (KB, MB, GB…) change with the switch.
Does this GB to TB converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.