Zettabytes (ZB) to Bytes (B) Converter
Convert zettabytes to bytes.
1 ZB = 1e21 B
How to convert ZB to Bytes (B)
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Zettabyte is 1021 bytes and 1 Byte is 100 bytes. Divide one by the other and you get the ratio between the two units: 1021 ÷ 100 = 1021.
Zettabyte is the bigger unit, so you multiply. Every ZB holds 1021 B, which means the decimal point moves 21 places to the right.
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
Bytes (B) = ZB × 10211 ZB = 1 × 1021 B1021 means 1 followed by 21 zeros
Worked example 1: Converting 1 ZB
1 ZB × 1021 = 1 × 1021 BThe decimal point moves 21 places to the right.
Analysts quote the total data created worldwide in a year in zettabytes.
Worked example 2: Converting 0.5 ZB
0.5 ZB × 1021 = 5 × 1020 BThe decimal point moves 21 places to the right.
Worked example 3: Converting 12.75 ZB
12.75 ZB × 1021 = 1.275 × 1022 BThe decimal point moves 21 places to the right.
Need the other direction? Open the Bytes (B) to ZB converter.
ZB to Bytes (B) examples
Analysts quote the total data created worldwide in a year in zettabytes. In bytes that is 1 × 1021 B.
| ZB | B |
|---|---|
| 1 ZB | 1 × 1021 B |
| 2.5 ZB | 2.5 × 1021 B |
| 10 ZB | 1 × 1022 B |
| 50 ZB | 5 × 1022 B |
| 100 ZB | 1 × 1023 B |
| 500 ZB | 5 × 1023 B |
| 1,000 ZB | 1 × 1024 B |
Where ZB to Bytes (B) comes up
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.
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.
Bytes are the base unit, so this gives the exact count that programs, APIs and file properties report.
Going from zettabytes down to bytes always gives a bigger number, because the unit you land on is smaller. It is the usual direction when a limit or a form asks for a smaller unit than the one you have in mind.
ZB to Bytes (B) FAQ
How many bytes are in 1 zettabyte?
There are 1021 bytes in 1 zettabyte, so 1 ZB = 1021 B.
Is ZB to B 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 B to ZB?
Go the other way: divide by 1021, which moves the decimal point 21 places to the left. The swap button on the converter does it for you.