Convert tebibytes to terabytes

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1 TiB is exactly 1.099511627776 TB, which makes it 9.95% bigger than a terabyte. Enter a figure in tebibytes from your NAS, from Linux or from cloud documentation, and the converter gives it in terabytes, the unit drive makers print on the box.

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Where will you come across tebibytes?

A tebibyte (TiB) is 1,024 gibibytes, or 240 = 1,099,511,627,776 bytes[1]. The “i” in the symbol tells you the unit is built from powers of two, while a terabyte is built from thousands.

You will see tebibytes labelled as such in server and cloud documentation and on Linux. The df -h command counts in powers of 1,024 and adds a single letter to each size, so a T there means tebibytes[2].

More often, tebibytes hide behind the TB symbol. A Synology NAS measures drive sizes in binary[3], and Windows does the same while labelling the result with decimal units[4]. So if File Explorer shows a drive as 14.5 TB, enter 14.5 above as tebibytes and you get the capacity in the terabytes that appear on a drive label.

A black two-bay Synology DS218+ NAS
The Synology DS218+ has DISK 1 and DISK 2 status lights on the front, one for each drive bay. Its system measures those drives in binary, so the sizes it reports can be converted to terabytes here. Photo: Claudio Schwarz, Unsplash.

How many terabytes are in a tebibyte? Formula and Excel

A tebibyte is exactly 1.099511627776 terabytes. The value ends because 240 divided by a trillion gives a decimal that terminates, so the converter shows it in full with no rounding:

  • TB = TiB × 1,099,511,627,776 ÷ 1012,
  • TB = TiB × 1.099511627776.

A 10 TiB cloud quota is therefore 10.99511627776 TB, almost 11 TB. When you buy drives to fill a quota like that, add up the capacities printed on their labels and compare the total with this figure.

In Excel, use =CONVERT(A2,"Tibyte","Tbyte"). The prefix “Ti” in this function stands for tebi, or 240[1]. To turn a label capacity into tebibytes, open the TB to TiB converter, and for any other pair of units use the data unit converter.

How many terabytes is a given number of tebibytes?

The results are exact, because a tebibyte has a finite value in terabytes.
TebibytesTerabytes
0.5 TiB0.549755813888 TB
1 TiB1.099511627776 TB
2 TiB2.199023255552 TB
4 TiB4.398046511104 TB
8 TiB8.796093022208 TB
10 TiB10.99511627776 TB
16 TiB17.592186044416 TB
20 TiB21.99023255552 TB
32 TiB35.184372088832 TB
50 TiB54.9755813888 TB
64 TiB70.368744177664 TB
100 TiB109.9511627776 TB
256 TiB281.474976710656 TB
1,024 TiB1,125.899906842624 TB

Which disk limits are set in tebibytes?

Limits on partitions, file systems and cloud volumes come from powers of two, so their documentation gives them in tebibytes or in terabytes counted in binary. The table shows what each limit means in label terabytes.
LimitIn tebibytesIn terabytes
Drive with an MBR partition table2 TiB2.199023255552 TB
NTFS volume with the default 4 KB cluster16 TiB17.592186044416 TB
Amazon EBS volume64 TiB70.368744177664 TB
NTFS volume according to AWS256 TiB281.474976710656 TB
AWS states the MBR, NTFS and EBS volume limits in tebibytes[5]. Microsoft gives 16 TB for a 4 KB cluster, but that limit is 232 − 1 clusters of 4 KB, which is almost exactly 16 TiB[6]. An 18 TB drive, which holds 16.37 TiB, therefore does not fit in a single NTFS volume with the default cluster size and needs 8 KB clusters.

Which ways of writing tebibytes does this converter accept?

Paste the number the way you have it: with a decimal point, with thousands separators, or together with the symbol from a program window. The field reads each of these and converts it for you, and the converter itself worked out every result in the table.
What you typeWhat the converter showsHow we read it
3.53.848290697216 TBThe dot is the decimal point, so the field holds three and a half tebibytes.
1,0241125.899906842624 TBA comma before three digits is a thousands separator, so the field counts one thousand and twenty-four tebibytes. A note under the field says so; type one point zero two four as 1.024.
1.5001.649267441664 TBA single dot is always read as a decimal point, so the field counts one and a half tebibytes. A note under the field says so; type fifteen hundred as 1500 or 1,500.
½0.549755813888 TBA ½ character copied from text counts as half a tebibyte.
1e31099.511627776 TBScientific notation from a spreadsheet is read as written, so 1e3 is a thousand tebibytes.
64TiB70.368744177664 TBThe TiB stuck to the number, as cloud documentation writes it, is dropped and the field counts sixty-four tebibytes.
14.55 TiB15.997894184141 TBA capacity copied from a NAS window together with its symbol is read as 14.55 tebibytes.
3.7T4.068193022771 TBThe T from the df -h output stands for tebibytes, so the field counts 3.7 TiB.
4 TB4 TBTerabytes from a label pasted into the tebibyte field are written in as 3.637979 TiB, so the result comes back to 4 TB.
3,725.29 GiB3.999999679529 TBGibibytes, say from a Linux tool, are written in as 3.637979 TiB. The result is just under 4 TB because 3,725.29 is already a rounded figure.
1 PB1000 TBA petabyte pasted into the tebibyte field is written in as 909.494702 TiB, so the result is exactly a thousand terabytes.

Convert other units to Terabytes

GB to TBPB to TB

Sources

  1. CONVERT function — Microsoft
  2. df invocation — GNU Coreutils
  3. Why does my drive size appear smaller on Synology storage system? — Synology
  4. Binary prefix — Wikipedia
  5. Amazon EBS volume constraints — Amazon Web Services
  6. NTFS overview — Microsoft

Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.

Content last reviewed: · written and checked by the Arteon team

Frequently asked questions about tebibytes and terabytes

How do I make df show terabytes instead of tebibytes?

Use df -H or df --si. Both count in powers of 1,000, so the result uses the same units as the drive label[2].

Is 16 TiB the same as 16 TB?

No. 16 TiB is 17.592186044416 TB, more than one and a half terabytes extra. The gap grows with the number, because every tebibyte is 9.95% bigger than a terabyte.

Arteon free tool screenshot: Convert tebibytes to terabytes

Have a question or suggestion?

If you spot a mistake in a table or a limit set in tebibytes is missing, let us know.