Terabytes (TB) to Zettabytes (ZB) Converter
Convert terabytes to zettabytes.
1 TB = 0.000000001 ZB
How to convert TB to ZB
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Terabyte is 1012 bytes and 1 Zettabyte is 1021 bytes. Divide one by the other and you get the ratio between the two units: 1012 ÷ 1021 = 10−9.
Terabyte is the smaller unit, so you divide. One TB is only 1 × 10−9 of a ZB, which means the decimal point moves 9 places to the left.
On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 3 steps apart. Every step is a factor of 1,000, so 3 steps means 1,000 multiplied by itself 3 times, which is 109.
The formula
ZB = TB ÷ 1,000,000,0001 TB = 1 × 10−9 ZB
Worked example 1: Converting 1 TB
1 TB ÷ 1,000,000,000 = 1 × 10−9 ZBThe decimal point moves 9 places to the left.
1 TB is a common size for a laptop SSD or an external hard drive.
Worked example 2: Converting 0.5 TB
0.5 TB ÷ 1,000,000,000 = 5 × 10−10 ZBThe decimal point moves 9 places to the left.
Worked example 3: Converting 12.75 TB
12.75 TB ÷ 1,000,000,000 = 1.275 × 10−8 ZBThe decimal point moves 9 places to the left.
Need the other direction? Open the ZB to TB converter.
TB to ZB examples
1 TB is a common size for a laptop SSD or an external hard drive. In zettabytes that is 1 × 10−9 ZB.
| TB | ZB |
|---|---|
| 1 TB | 1 × 10−9 ZB |
| 2.5 TB | 2.5 × 10−9 ZB |
| 10 TB | 1 × 10−8 ZB |
| 50 TB | 5 × 10−8 ZB |
| 100 TB | 1 × 10−7 ZB |
| 500 TB | 5 × 10−7 ZB |
| 1,000 TB | 0.000001 ZB |
Where TB to ZB comes up
A terabyte is 1,000 gigabytes, about 250,000 photos at 4 MB each. Terabytes are how consumer SSDs, external drives, home NAS boxes and cloud storage plans are sold.
A zettabyte is 1,000 exabytes, or a trillion gigabytes. Zettabytes appear in market reports and forecasts about how much data the world creates, copies and stores each year.
Going from terabytes up to zettabytes always gives a smaller number, because you are counting in bigger chunks. People do it to make a long number readable, or to compare a file with the size of a drive or a plan.
TB to ZB FAQ
How many zettabytes are in 1 terabyte?
One terabyte is 1 × 10−9 of a zettabyte. It takes 1,000,000,000 terabytes to make 1 zettabyte.
Is TB to ZB decimal or binary?
This page is decimal (SI), where 1 KB = 1,000 B. Operating systems often count in powers of 1,024 and still print KB, MB or GB, when they really mean KiB, MiB and GiB. At ZB the two systems differ by about 18.1%.
How do I convert ZB to TB?
Go the other way: multiply by 1,000,000,000, which moves the decimal point 9 places to the right. The swap button on the converter does it for you.