Gigabytes to Terabytes
One gigabyte equals 0.001 terabytes.
Terabytes = gigabytes ÷ 1000
Digital Storage Conversion
Common File Sizes
Digital Storage Reference Guide
Binary vs Decimal Systems
Binary (1024-based): Used by operating systems
1 KiB = 1,024 bytes
1 MiB = 1,024 KiB = 1,048,576 bytes
1 GiB = 1,024 MiB = 1,073,741,824 bytes
Decimal (1000-based): Used by storage manufacturers
1 KB = 1,000 bytes
1 MB = 1,000 KB = 1,000,000 bytes
1 GB = 1,000 MB = 1,000,000,000 bytes
Storage Device Capacities
Floppy Disk: 1.44 MB
CD: 700 MB
DVD: 4.7 GB (single layer)
Blu-ray: 25 GB (single layer)
USB Flash: 8 GB - 1 TB
SSD: 120 GB - 8 TB
HDD: 500 GB - 20 TB
Enterprise: Up to 100 TB+
Data Transfer & Internet
Email attachment limit: ~25 MB
Streaming (HD): ~3 GB/hour
Streaming (4K): ~7 GB/hour
Web page: ~2 MB average
Mobile app: 10-200 MB
PC game: 20-150 GB
Important Notes
• 1 byte = 8 bits (fundamental relationship)
• Storage manufacturers use decimal, OS shows binary (explains "missing" space)
• Network speeds typically measured in bits per second (bps)
• File compression can significantly reduce storage requirements
Gigabytes to Terabytes Conversion Table
| GB | TB |
|---|---|
| 1 | 0.001 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 512 | 0.512 |
| 1000 | 1 |
| 1024 | 1.024 |
| 2000 | 2 |
| 4000 | 4 |
| 8000 | 8 |
| 10000 | 10 |
| 16000 | 16 |
| 20000 | 20 |
| 50000 | 50 |
About This Conversion
Gigabytes to terabytes divides by 1,000 in the decimal units drives are sold in. A 500 GB SSD is 0.5 TB, and 8,000 GB is the 8 TB written on the box.
This is the conversion where advertised capacity and reported capacity part company. A 1 TB drive holds 1,000,000,000,000 bytes, which the operating system divides by 1,024 three times and reports as about 931 GiB. Nothing is missing; the drive is measured in decimal and reported in binary.
Frequently Asked Questions
How many GB are in a TB?
1 TB is 1,000 GB in decimal units, the convention drive manufacturers use.
Why does my 1 TB drive show 931 GB?
The drive holds 10¹² bytes, and the operating system reports binary gibibytes, which are larger. 10¹² bytes is about 931 GiB.
How many TB is 500 GB?
500 GB is 0.5 TB.
How many GB is 2 TB?
2 TB is 2,000 GB.
Worth Knowing
MB vs MiB
A megabyte is 1,000,000 bytes while a mebibyte is 1,048,576 bytes, and the gap grows with each prefix until a 1 TB drive reports as 931 GB.
Related Conversions
Converting the other way? Terabytes to Gigabytes
Need a different unit? Open the full digital storage converter