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terabyte (TB) → gigabyte (GB)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
TB=GB
1=1,024
2=2,048
4=4,096
8=8,192
16=16,384
32=32,768
64=65,536
128=131,072
256=262,144
512=524,288
1024=1,048,576

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Brief explanation: terabyte to gigabyte

Byte = 8 bits. 1 KB = 1024 bytes in binary (KiB). 1 MB = 1024 KB. Some storage providers use decimal (1000 bytes = 1 KB). GB and TB are used for storage capacity. The binary system (1024) is used by operating systems. The decimal system (1000) is sometimes used by manufacturers. Our converter uses the binary standard (1024) for consistency with most software.

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Common conversion examples: terabyte to gigabyte

Reference values for quick comparison. Use the converter above for any amount.

  • 1 terabyte=1,024 gigabyte
  • 1.02e+3 terabyte=1,048,576 gigabyte
  • 1.05e+6 terabyte=1,073,741,824 gigabyte

About the Units

terabyte (TB)

Definition: A terabyte (TB) is 1,024 gigabytes or about 1 trillion bytes. It is used for large storage systems, backups, and data centers.
History: The terabyte became common as consumer storage reached hundreds of gigabytes. External drives and cloud storage now offer terabytes.
Current use: Terabytes measure hard drives, cloud storage, and data center capacity. A 1 TB drive holds about 250,000 photos. Video production and servers use TB.

gigabyte (GB)

Definition: A gigabyte (GB) is 1,024 megabytes or about 1 billion bytes. It is used for large files, storage capacity, and memory.
History: The gigabyte became standard as hard drives and memory grew. Early PCs had megabytes; modern devices have gigabytes or terabytes of storage.
Current use: Gigabytes measure storage capacity, video files, and RAM. A typical movie is 1–4 GB. Smartphones have 64–256 GB storage. 1 GB ≈ 1,000 MB.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: