In 1 gigabytes there are 0.001 terabytes. Meanwhile in 1 terabytes there are 1,000 gigabytes. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Terabytes to Gigabytes calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert gigabytes (GB) to terabytes (TB), use the decimal (SI) standard: 1 TB = 1,000 GB. That means you divide gigabytes by 1,000 to get terabytes.
This GB to TB conversion works for storage labels that follow SI units, where tera means 10¹² bytes.
In decimal units (used by most storage makers), 1 terabyte (TB) = 1,000 gigabytes (GB).
In binary units (used by many operating systems), 1 tebibyte (TiB) = 1,024 gibibytes (GiB). This is often shown as “TB” in system menus, which can cause mix-ups.
Both show up, depending on the standard.
Many people say “1 TB = 1024 GB,” but that mixes labels. The accurate match is TB to GB (1000) and TiB to GiB (1024).
Drive labels use decimal math, but many computers report space using binary math.
A 1 TB drive is 1,000,000,000,000 bytes. When your system shows that in binary units, it comes out to about 0.91 TiB, which often displays as 931 GB or similar.
To convert gigabytes to terabytes (decimal), divide by 1,000:
Examples:
To convert terabytes to gigabytes (decimal), multiply by 1,000:
Examples:
TB (terabyte) is decimal: 10¹² bytes.
TiB (tebibyte) is binary: 2⁴⁰ bytes.
They measure similar amounts, but they are not the same:
GB (gigabyte) is decimal: 10⁹ bytes.
GiB (gibibyte) is binary: 2³⁰ bytes.
Common comparisons:
Using decimal units:
Using binary units:
Using decimal units:
If you’re comparing to binary reporting, 2 TB ≈ 1.82 TiB, which may show as about 1,862 GB in some displays.
Using decimal units:
In binary terms, 0.5 TB ≈ 0.455 TiB.
Using decimal units:
Many phones and SSDs are sold in GB using decimal labels, so this is the usual conversion.
Using decimal units:
People often expect 1024 GB to equal 1 TB, but that’s a binary idea. In decimal terms, it’s slightly more than 1 TB.
Using decimal units:
TB is bigger than GB.
In decimal units, 1 TB equals 1,000 GB.
Most data plans and file transfers use decimal labels in practice. You’ll still see small gaps between what you expect and what a device reports, because devices may show binary units while the plan uses decimal units.
No. The file stays the same size. Only the unit label changes.
A 1,000 GB total is the same amount of data as 1 TB (decimal). You’re just expressing it in different units.
Some systems and apps display binary values but label them as GB. It’s a long-running habit in software. This is why a drive or folder can look “smaller” than expected even when nothing is missing.
Use this simple rule for decimal units:
Examples:
The Calculate Box tool to convert gigabytes to terabytes uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a gigabytes value in the box and have it instantly converted to terabytes.