What is the GB to TB Converter?
This tool converts a storage size in gigabytes (GB) to terabytes (TB). Because the computing industry uses two different definitions of a "terabyte," the calculator lets you pick between the binary standard (1 TB = 1024 GB) and the decimal standard (1 TB = 1000 GB). This applies universally — it is pure unit conversion with no country or jurisdiction restrictions.
How to use it
Enter the number of gigabytes you want to convert, choose whether you want the binary or decimal interpretation, and read the equivalent terabytes. Use binary when matching values reported by Windows, macOS, or Linux file managers, and decimal when matching the capacity printed on a hard drive or SSD box.
The formula explained
The conversion simply divides gigabytes by the number of gigabytes in one terabyte. Under the binary convention a terabyte is \(2^{10} = 1024\) gigabytes, so
$$\text{TB} = \frac{\text{Gigabytes (GB)}}{1024}$$Under the decimal (SI) convention a terabyte is 1000 gigabytes, so
$$\text{TB} = \frac{\text{Gigabytes (GB)}}{1000}$$The decimal answer is always slightly larger than the binary answer for the same GB value.
Worked example
Suppose you have 2048 GB. Using the binary standard:
$$2048 \div 1024 = 2 \text{ TB}$$Using the decimal standard:
$$2048 \div 1000 = 2.048 \text{ TB}$$This difference is exactly why a "2 TB" drive often shows up as roughly 1.82 TB in your operating system.
FAQ
Which standard should I use? Use binary (1024) to match what your computer reports, and decimal (1000) to match marketing/storage labels.
Why does my drive show less space than advertised? Manufacturers measure in decimal terabytes, but operating systems measure in binary, so a 1 TB (1,000,000,000,000 byte) drive shows about 0.909 binary TB.
Is GiB the same as binary GB? Yes — the precise IEC term for binary gigabytes is gibibytes (GiB) and for terabytes is tebibytes (TiB).
