How many GB are in a TB?

One decimal terabyte (TB) is exactly 1,000 decimal gigabytes (GB). One binary tebibyte (TiB) is exactly 1,024 gibibytes (GiB). Some software uses GB or TB labels for binary counts, while other software uses decimal units; consult its byte count or documented convention. The labeled units here are distinct: 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?

An exact stated 4 decimal TB quantity is 4,000,000,000,000 bytes, which displays as 3.63797880709 TiB (about 3.64 TiB to two decimal places). Software that labels binary TiB as TB can display a smaller numeric count for the same bytes. This conversion cannot establish a drive’s usable capacity, formatting or reserved space. For stated quantities, 12 TB displays as 10.9139364213 TiB and 16 TB as 14.5519152284 TiB. Choose Terabyte (TB) in From and Tebibyte (TiB) in To for those conversions.

Is a terabyte 1,000 GB or 1,024 GB?

A terabyte is exactly 1,000 decimal GB; a tebibyte is exactly 1,024 binary GiB. A TB is 1,000,000,000,000 bytes and a TiB 1,099,511,627,776 bytes. The same quantity of 1 TiB displays as 1.09951162778 TB, and 1 TB as 0.909494701773 TiB. For equal numeric unit counts, a KiB has 2.4% more bytes than a kB, a GiB about 7.4% more than a GB and a TiB about 9.95% more than a TB. For an equal byte quantity, the larger unit produces a smaller numeric count; no data loss follows from changing units.

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?

The display rounds to twelve significant digits, while the exact byte definition of a TiB needs thirteen. Decimal-rational arithmetic uses the exact definition 1 TiB = 1,099,511,627,776 bytes; only the displayed and copied numeric output rounds to 1,099,511,627,780. Results in any target unit can need rounding when they exceed twelve significant digits. One GiB is exactly 1,073,741,824 bytes. Use the exact definition when an exact byte count is required rather than multiplying rounded printed values.

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, the same stated byte quantity expressed in binary units.

Does opening this page change the main converter?

This focused page opens on Gibibyte and Tebibyte, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

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 the other digital units, with the GiB input identified in the heading: 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.

From

To0.0009765625

Category: Digital storage

Base unit: byte

kB, MB, GB and TB use powers of 1,000; KiB, MiB, GiB and TiB use powers of 1,024. One byte is eight bits; labels used by other software may differ.

Results round to 12 significant digits using the listed unit definitions. Input must have a finite numeric magnitude and at most 512 significant digits. Type a single decimal or scientific number; a matching From unit suffix is accepted. Commas and grouped spaces separate thousands; decimal commas, fractions and compound measurements are refused.

1 GiB in every digital storage unit

Bitbit
8,589,934,592
ByteB
1,073,741,824
KilobytekB
1,073,741.824
MegabyteMB
1,073.741824
GigabyteGB
1.073741824
TerabyteTB
0.001073741824
KibibyteKiB
1,048,576
MebibyteMiB
1,024
TebibyteTiB
0.0009765625

Selectable complete conversion

Unit Converter — Digital storage
Input: 1 (Gibibyte, GiB)
Result: 0.0009765625 TiB (Tebibyte)
Displayed values round to 12 significant digits.
kB, MB, GB and TB use powers of 1,000; KiB, MiB, GiB and TiB use powers of 1,024. One byte is eight bits; labels used by other software may differ.
All other units:
Bit (bit): 8589934592
Byte (B): 1073741824
Kilobyte (kB): 1073741.824
Megabyte (MB): 1073.741824
Gigabyte (GB): 1.073741824
Terabyte (TB): 0.001073741824
Kibibyte (KiB): 1048576
Mebibyte (MiB): 1024
Tebibyte (TiB): 0.0009765625

Common questions

How many GB are in a TB?: One decimal terabyte (TB) is exactly 1,000 decimal gigabytes (GB). One binary tebibyte (TiB) is exactly 1,024 gibibytes (GiB). Some software uses GB or TB labels for binary counts, while other software uses decimal units; consult its byte count or documented convention. The labeled units here are distinct: 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?: An exact stated 4 decimal TB quantity is 4,000,000,000,000 bytes, which displays as 3.63797880709 TiB (about 3.64 TiB to two decimal places). Software that labels binary TiB as TB can display a smaller numeric count for the same bytes. This conversion cannot establish a drive’s usable capacity, formatting or reserved space. For stated quantities, 12 TB displays as 10.9139364213 TiB and 16 TB as 14.5519152284 TiB. Choose Terabyte (TB) in From and Tebibyte (TiB) in To for those conversions.
Is a terabyte 1,000 GB or 1,024 GB?: A terabyte is exactly 1,000 decimal GB; a tebibyte is exactly 1,024 binary GiB. A TB is 1,000,000,000,000 bytes and a TiB 1,099,511,627,776 bytes. The same quantity of 1 TiB displays as 1.09951162778 TB, and 1 TB as 0.909494701773 TiB. For equal numeric unit counts, a KiB has 2.4% more bytes than a kB, a GiB about 7.4% more than a GB and a TiB about 9.95% more than a TB. For an equal byte quantity, the larger unit produces a smaller numeric count; no data loss follows from changing units.
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?: The display rounds to twelve significant digits, while the exact byte definition of a TiB needs thirteen. Decimal-rational arithmetic uses the exact definition 1 TiB = 1,099,511,627,776 bytes; only the displayed and copied numeric output rounds to 1,099,511,627,780. Results in any target unit can need rounding when they exceed twelve significant digits. One GiB is exactly 1,073,741,824 bytes. Use the exact definition when an exact byte count is required rather than multiplying rounded printed values.
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, the same stated byte quantity expressed in binary units.
Does opening this page change the main converter?: This focused page opens on Gibibyte and Tebibyte, while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.

Results round to 12 significant digits using the listed unit conventions. Many factors are exact definitions; psi and parsec use rounded coefficients. Temperature includes scale offsets. Days and weeks are fixed-duration units, and unit conversion does not determine calendar dates, ambient pressure or a software label’s convention.