Bytes (B) to Zettabytes (ZB) Converter
Convert bytes to zettabytes.
1 B = 1e-21 ZB
How to convert Bytes (B) to ZB
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Byte is 100 bytes and 1 Zettabyte is 1021 bytes. Divide one by the other and you get the ratio between the two units: 100 ÷ 1021 = 10−21.
Byte is the smaller unit, so you divide. One B is only 1 × 10−21 of a ZB, which means the decimal point moves 21 places to the left.
On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 7 steps apart. Every step is a factor of 1,000, so 7 steps means 1,000 multiplied by itself 7 times, which is 1021.
The formula
ZB = Bytes (B) ÷ 10211 B = 1 × 10−21 ZB1021 means 1 followed by 21 zeros
Worked example 1: Converting 160 B
160 B ÷ 1021 = 1.6 × 10−19 ZBThe decimal point moves 21 places to the left.
160 B is about 160 characters of plain ASCII text.
Worked example 2: Converting 0.5 B
0.5 B ÷ 1021 = 5 × 10−22 ZBThe decimal point moves 21 places to the left.
Worked example 3: Converting 12.75 B
12.75 B ÷ 1021 = 1.275 × 10−20 ZBThe decimal point moves 21 places to the left.
Need the other direction? Open the ZB to Bytes (B) converter.
Bytes (B) to ZB examples
160 B is about 160 characters of plain ASCII text. In zettabytes that is 1.6 × 10−19 ZB.
| B | ZB |
|---|---|
| 1 B | 1 × 10−21 ZB |
| 2.5 B | 2.5 × 10−21 ZB |
| 10 B | 1 × 10−20 ZB |
| 50 B | 5 × 10−20 ZB |
| 100 B | 1 × 10−19 ZB |
| 500 B | 5 × 10−19 ZB |
| 1,000 B | 1 × 10−18 ZB |
Where Bytes (B) to ZB comes up
A byte is eight bits, enough to store one character of plain English text. Bytes show up whenever you need the exact number: file properties, HTTP headers, memory buffers, database column limits and the counts programs print in logs.
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.
Starting from bytes means turning an exact count into a unit people can read at a glance.
Going from bytes 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.
Bytes (B) to ZB FAQ
How many zettabytes are in 1 byte?
One byte is 1 × 10−21 of a zettabyte. It takes 1021 bytes to make 1 zettabyte.
Is B 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 B?
Go the other way: multiply by 1021, which moves the decimal point 21 places to the right. The swap button on the converter does it for you.