Terabytes to Gigabytes
One terabyte equals 1000 gigabytes.
Gigabytes = terabytes × 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
Terabytes to Gigabytes Conversion Table
| TB | GB |
|---|---|
| 0.25 | 250 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 6 | 6000 |
| 8 | 8000 |
| 10 | 10000 |
| 12 | 12000 |
| 16 | 16000 |
| 18 | 18000 |
| 20 | 20000 |
| 50 | 50000 |
| 100 | 100000 |
About This Conversion
Terabytes to gigabytes multiplies by 1,000 in decimal units, the step needed when a plan or a drive is sold in terabytes but usage is tracked in gigabytes.
Cloud storage and backup pricing usually straddle both. A 2 TB plan is 2,000 GB, so a 250 GB backup uses an eighth of it. Note that providers bill in decimal terabytes, matching drive manufacturers rather than the binary figures a file browser shows.
Frequently Asked Questions
How many GB is 1 TB?
1 TB is 1,000 GB in decimal units.
How many GB is 2 TB?
2 TB is 2,000 GB.
How many GB is 0.5 TB?
0.5 TB is 500 GB.
Do cloud providers use decimal or binary terabytes?
Decimal. A 1 TB plan means 1,000 GB, not 1,024 GiB.
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? Gigabytes to Terabytes
Need a different unit? Open the full digital storage converter