GB to TB●
Gigabytes in. Terabytes out. Size up drives and backups.
Digital storage
1 byte = 8 bits. Decimal: kB, MB, GB (×1,000). Binary: KiB, MiB, GiB (×1,024).
Definitions: NIST binary prefixes ↗Use a decimal point, for example 2.54. Scientific notation works too: 1e3.
Try a value
Pick an example to startThe formula
terabytes = gigabytes ÷ 1000
Divide the number of gigabytes by 1000 to get terabytes. To go the other way, multiply by the same number.
A worked example
For 500 GB, divide 500 by 1000. The result is approximately 0.5 TB.
500 ÷ 1000 ≈ 0.5 TB
Quick reference
Reference values are rounded to 6 decimal places. Use the converter above for other values or precision.
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 64 | 0.064 |
| 128 | 0.128 |
| 256 | 0.256 |
| 500 | 0.5 |
| 512 | 0.512 |
| 1,000 | 1 |
| 2,000 | 2 |
| 4,000 | 4 |
| 8,000 | 8 |
All equivalent units
The same value, in every supported unit.
Digital storage conversions
For drives, backups and servers.
Use this conversion for hard drives, SSDs, NAS storage and cloud backups. In decimal units 1 TB is 1000 GB. Operating systems that count in binary units show a smaller number for the same drive.
Calculation details & precision
A byte is 8 bits. Decimal prefixes use powers of 1,000: 1 kB = 1,000 B and 1 GB = 1,000,000,000 B. Binary prefixes use powers of 1,024: 1 KiB = 1,024 B and 1 GiB = 1,073,741,824 B. Calculations use bytes as the base unit.
Automatic displays up to 12 significant digits. Choose 2, 4 or 6 decimal places in Precision for a shorter result. Displayed results are rounded; very large or small values use scientific notation.
Common questions
Why does a 1 TB drive show less space?
Makers count 1 TB as 1000 GB, while some systems show binary units, so the drive appears as about 931 GiB.
How many terabytes are in 1000 gigabytes?
1000 GB is approximately 1 TB. The converter can show more significant digits or round to a chosen number of decimal places.