Terabits (Tb) to Gigabytes (GB) Converter
Enter your Terabits (Tb) value to convert to Gigabytes (GB). 1 Tb = 125 GB, calculated across both decimal (SI) and binary (IEC) standards.
Convert Terabits to Gigabytes
Do you want to convert gigabytes to terabits?
How to Convert Terabits to Gigabytes
To convert terabits to gigabytes, divide by 8 then adjust for scale. Since 1 byte = 8 bits, this conversion translates bit-based measurements to the byte-based units used for storage capacity. You might also need: GB to Tb converter.
Tb measures data in bits—commonly used for memory addressing and low-level data specifications. You might also need: Tb to Pb.
GB measures data in bytes—the standard unit for file sizes, storage capacity, and what you see in file explorers. See also: Yottabits in Gigabytes.
1 Tb = 125 GB (using SI decimal standard) — which means there are 125gigabytes in every terabit.
Tb to GB Conversion Formula
// Convert Tb to GB
GB = Tb × 125
// Reverse: Convert GB to Tb
Tb = GB × 0.008
Tb to GB Conversion Examples
100 Tb = 12,500 GB
256 Tb = 32,000 GB
500 Tb = 62,500 GB
1,000 Tb = 125,000 GB
2,048 Tb = 256,000 GB
What Is a Terabit?
A terabit is 1,000 gigabits or 10^12 bits. Used for backbone network and data center connections. Use our converting Gibibits to Yobibytes.
The terabit is a SI decimal bit unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Learn more: Tibps to Ybps conversion rate.
Common uses: Data center interconnects, backbone networks, high-capacity optical links See also: calculate Tb to EiB.
1 Tb = 1 × 10¹² bits = 125 × 10⁹ bytes.
The terabit can be abbreviated as Tb; for example, 1 terabit can be written as 1 Tb.
What Is a Gigabyte?
A gigabyte is 1,000 megabytes or 1,000,000,000 bytes using the SI decimal standard. This is what hard drive manufacturers typically use. Check out our how many Gigabytes in a PiB.
The gigabyte is a SI decimal unit of digital information storage. It uses base 1,000 following the SI (International System of Units) standard. Related: how many MiB in Zettabytes.
Common uses: Movies, video games, smartphone storage, USB drives, cloud storage plans You might also need: Zettabytes Per Second to GiB/s.
1 GB = 8 × 10⁹ bits = 1 × 10⁹ bytes.
The gigabyte can be abbreviated as GB; for example, 1 gigabyte can be written as 1 GB.
Terabit to Gigabyte Conversion Table
The table below shows various terabit measurements converted to gigabytes.
| Terabits | Gigabytes |
|---|---|
| 1 Tb | 125 GB |
| 2 Tb | 250 GB |
| 5 Tb | 625 GB |
| 10 Tb | 1,250 GB |
| 25 Tb | 3,125 GB |
| 50 Tb | 6,250 GB |
| 100 Tb | 12,500 GB |
| 250 Tb | 31,250 GB |
| 500 Tb | 62,500 GB |
| 1,000 Tb | 125,000 GB |
💡 Storage Engineer Tip
Remember: 8 bits = 1 byte. When your ISP advertises "100 Mbps," divide by 8 to get your actual download speed in MB/s (approximately 12.5 MB/s theoretical maximum).
— Subash Geetha Krishnan, 15+ years in enterprise storage
When to Convert Tb to GB
Common scenario: Converting your internet speed (Mbps) to actual download rate in MB/s, or calculating real-world transfer capabilities. You might also need: convert Tb to Exabits.
Other situations include storage planning for calculating how much data fits in a given capacity, file management for understanding sizes across different scales, cost estimation for budgeting cloud storage, and backup planning for determining media requirements. Learn more: KiB to GB calculator.