Convert Terabytes to Gigabytes – Data Converter
This converter transforms any terabyte (TB) value into gigabytes (GB) following the SI decimal convention used by drive manufacturers, cloud providers, and billing dashboards.
Because 1 terabyte equals 1,000 gigabytes in decimal notation, the conversion is a single multiplication by 1,000. Use it to reconcile capacity specs, transfer quotas, and archive planning.
Interactive Converter
Convert between terabyte and gigabyte with precision rounding.
Quick reference table
| Terabyte | Gigabyte |
|---|---|
| 1 TB | 8 GB |
| 5 TB | 40 GB |
| 10 TB | 80 GB |
| 25 TB | 200 GB |
| 50 TB | 400 GB |
| 100 TB | 800 GB |
Methodology
Use the decimal SI definition: 1 TB = 1,000 GB. The converter multiplies the TB input by 1,000 to return GB.
If a workload expects binary units (TiB/GiB), apply 1 TiB = 1,024 GiB. This tool surfaces the decimal baseline; binary guidance is noted for completeness.
Worked examples
1 TB → 1,000 GB
2.5 TB → 2,500 GB
10 TB → 10,000 GB
Expert Q&A
Why does my OS show less than the drive label?
Drive labels use decimal (TB, GB) while many operating systems display binary (TiB, GiB). A 1 TB drive (1,000 GB) appears as about 931 GiB because the OS divides by 1,073,741,824 bytes per GiB.
Should I plan capacity in TB or TiB?
For procurement and vendor specs, TB is standard. For system sizing where the OS reports GiB/TiB, convert with binary factors to align with what the platform shows.
Is overhead considered in this conversion?
No. This is a pure unit conversion. Filesystem metadata, RAID, snapshots, and protocol overhead reduce usable capacity.
Sources & citations
- NIST — SI units and decimal prefixes — https://www.nist.gov/pml/weights-and-measures/si-units
- IEC binary prefix guidance — https://webstore.iec.ch/publication/2702