GB to TB Converter
One step up the storage ladder, and the size of the step depends on which pair of units you mean: 1,024 gibibytes make 1 tebibyte, and 1,000 gigabytes make 1 terabyte. This page opens with Gibibyte in the From box and Tebibyte in the To box, ahead of whatever pair the converter last remembered, so 1,024 GiB reads 1 TiB, 512 GiB reads 0.5 TiB and 4,096 GiB reads 4 TiB. The decimal reading is one menu away and is already in the list under the headline, which prints the same quantity in bits, bytes, kB, MB, GB, TB, KiB, MiB and TiB at once: 1 GiB is 1.073741824 GB and 0.001073741824 TB on the same screen. Every factor here is a power of two or a power of ten rather than a rounded approximation, which is why 250 GiB comes out as 0.244140625 TiB and not as a tidied 0.24. The swap button between the boxes turns the page into a tebibytes to gibibytes converter, where 1 TiB is 1,024 GiB.
1 GiB in every digital storage unit
Common questions
- How many GB are in a TB?
- 1,024 of them in binary and 1,000 in decimal, and this page carries both. The binary terabyte is properly the tebibyte (TiB), and it holds 1,024 gibibytes, which is what a file manager, a NAS dashboard or a RAID controller usually means when it writes TB. The decimal terabyte (TB) holds 1,000 gigabytes, and that is the unit a drive is sold in. The binary side halves and doubles cleanly: 512 GiB is 0.5 TiB, 2,048 GiB is 2 TiB and 4,096 GiB is 4 TiB.
- What is the formula for GB to TB?
- TiB = GiB / 1,024 for the binary pair this page opens on, and TB = GB / 1,000 for the decimal one. Reversed, GiB = TiB x 1,024 and GB = TB x 1,000, and the swap button between the two boxes sets that direction up without a reload. The single step from gibibyte to tebibyte is 1,024 rather than 1,073,741,824, because the 1,024 factors below it have already been applied once each.
- Worked example: how many TB is 500 GB?
- Typed on this page as 500 gibibytes it is 0.48828125 TiB, and read as 500 decimal gigabytes it is exactly 0.5 TB. The list under the answer gives the rest of the same quantity for 500 GiB: 536,870,912,000 bytes, 536,870.912 MB, 536.870912 GB, 0.536870912 TB, 524,288,000 KiB and 512,000 MiB. Each row has its own Copy button, and Copy result above the list copies the headline figure without the thousands separators it is displayed with.
- Why does my 4 TB drive show as about 3.64 TB?
- Because the box counted in decimal terabytes and the operating system is counting in tebibytes and calling them TB. Put 4 in the From box with Terabyte (TB) selected and Tebibyte (TiB) in the To box: the answer is 3.63797880709. The same gap scales up, so a 12 TB drive is 10.9139364213 TiB and a 16 TB drive is 14.5519152284 TiB. Nothing has gone missing from the drive: it is one quantity of bytes read under two definitions of the same word.
- Is a terabyte 1,000 GB or 1,024 GB?
- Both answers are in use, so both units are in the list under separate names. A terabyte (TB) is 1,000,000,000,000 bytes and a tebibyte (TiB) is 1,099,511,627,776 bytes. Converting one to the other on this page gives 1 TiB as 1.09951162778 TB, which makes the binary unit just under 10 percent larger, and 1 TB as 0.909494701773 TiB. The gap widens at every step of the ladder, from about 2.4 percent at kB against KiB, to about 7.4 percent at GB against GiB, to almost 10 percent here, which is why the argument only becomes loud at drive sizes.
- How do I get the plain decimal GB to TB answer?
- Choose Gigabyte (GB) in the From menu and Terabyte (TB) in the To menu, and the page divides by 1,000: 1,000 GB is 1 TB, 2,000 GB is 2 TB and 500 GB is 0.5 TB. Both menus list all ten digital units together, so the same number goes to megabytes, mebibytes, bytes or bits from the same screen, and the category strip above the stage moves you to length, mass or any other family without losing the figure you typed.
- Why does 1 TiB show as 1,099,511,627,780 bytes and not 1,099,511,627,776?
- Because results are printed to 12 significant digits, and the exact byte count of a tebibyte has 13. Rounding at 12 keeps chained conversions from showing floating-point debris such as a trailing 0000000002, and the cost is the last digit or two of a very large byte count. Every figure at gibibyte, tebibyte, megabyte or gigabyte scale on this page is inside that limit and prints in full, and the exact definitions stay what they always were: 1 GiB is 1,073,741,824 bytes and 1 TiB is 1,099,511,627,776.
- How do I convert TB back to GB?
- Press the swap button between the boxes and the page runs tebibytes to gibibytes: 1 TiB gives 1,024, 0.5 TiB gives 512, 2 TiB gives 2,048 and 4 TiB gives 4,096. For the decimal mix, entering 1 terabyte with Gibibyte selected in the To box gives 931.322574615 GiB, which is the number a 1 TB drive reports once a file manager has divided it by 1,073,741,824.
- Does opening this page change the main converter?
- No. This page sets gibibytes and tebibytes for itself, and the pair you left the main unit converter on is still there when you go back to it. Nothing you type is uploaded either: the conversion is arithmetic against a table of factors that ships with the page, so it runs in your browser, needs no account, and keeps working with no network connection once the page has loaded.
Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.