Gigabytes to Terabytes
Convert gigabytes to terabytes instantly. Free, fast, no signup.
How to use this tool
- Enter gigabytes in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your terabytes and the full breakdown beneath it.
Convert gigabytes to terabytes instantly. Free, fast, no signup.
Formula
Terabytes = Gigabytes ÷ 1,024
TB = GB × 0.0009765625
In binary convention, 1 TB = 210 GB = 1,024 GB, so dividing gigabytes by 1,024 converts to terabytes. The decimal multiplier is 1 ÷ 1,024 = 0.0009765625.
How it works
Each step up the binary storage prefix ladder (KB → MB → GB → TB) represents a multiplication by 1,024. Moving from gigabytes to terabytes — one step up — means dividing by 1,024, equivalent to multiplying by 0.0009765625.
A common mistake is dividing by 1,000 instead of 1,024. Many external hard drives and SSDs are marketed using decimal terabytes (1 TB = 1,000 GB), which is why a drive sold as 1 TB shows up as only about 931 GB in Windows or macOS (which use binary gigabytes). Using the wrong divisor can make a drive appear to have more or less capacity than it actually does.
Worked example
Convert 1,024 GB to TB
- Start with 1,024 GB.
- Divide by 1,024 (one binary prefix step): 1,024 ÷ 1,024 = 1.
- Confirm: 1,024 × 0.0009765625 = 1.0 TB.
1,024 GB = 1.0 TB
Common mistakes to avoid
- Confusing binary (1 TB = 1,024 GB) with decimal SI (1 TB = 1,000 GB) — most operating systems use binary, while hard-drive manufacturers use decimal, causing apparent discrepancies.
- Entering the value in MB instead of GB, yielding a result 1,000x too small.
- Rounding early: multiplying by 0.001 instead of dividing by 1,024 introduces a ~2.4% error.
Key terms
- Gigabyte (GB)
- A unit of digital storage equal to 1,024 megabytes (230 bytes) in binary convention.
- Terabyte (TB)
- A unit of digital storage equal to 1,024 gigabytes (240 bytes) in binary convention, or 1,000,000,000,000 bytes in decimal convention.
- Decimal vs. binary terabyte
- Drive manufacturers use 1 TB = 1,000 GB (decimal), while OSes report in binary, where 1 TB = 1,024 GB. This gap explains the discrepancy between advertised and reported drive sizes.
- Storage prefix ladder
- The hierarchy of digital storage units: Byte → Kilobyte → Megabyte → Gigabyte → Terabyte, each 1,024× larger than the previous in binary convention.
Frequently asked questions
- How do I convert gigabytes to terabytes?
- Multiply the number of gigabytes by 0.000976562 to get terabytes.