What Is Exabyte (EB)?
An exabyte is a very large unit used to measure digital information, such as files, videos, databases, internet traffic and all the data stored in the world.
It is much bigger than gigabytes and terabytes that you may know from phones and computers. We use exabytes when the amount of data is so huge that smaller units become hard to read or compare.
Definition
A byte is a small group of bits, usually 8 bits, and it can store one simple character, like a letter or number. All digital data is built from bytes.
An exabyte is defined in two main ways:
- Decimal exabyte (used by most storage companies and networks): 1 exabyte = 1,000,000,000,000,000,000 bytes (10^18 bytes).
- Binary style (closely related unit exbibyte): 1 exbibyte = 1,152,921,504,606,846,976 bytes (2^60 bytes). This is slightly larger than a decimal exabyte.
When people say exabyte or EB in normal talk, they almost always mean the decimal exabyte, based on 1000 steps.
In simple ladder form, using decimal steps:
- 1 kilobyte (KB) = 1,000 bytes
- 1 megabyte (MB) = 1,000 KB = 1,000,000 bytes
- 1 gigabyte (GB) = 1,000 MB
- 1 terabyte (TB) = 1,000 GB
- 1 petabyte (PB) = 1,000 TB
- 1 exabyte (EB) = 1,000 PB
History / Origin
The word exabyte comes from two parts:
- exa is an official prefix in the International System of Units (SI). It means 10^18, or a million trillion.
- byte is a group of bits that can store one simple character.
The SI prefix exa was approved in the 1970s to give scientists a clear way to talk about very large numbers. As computers grew and could store more and more data, people in computing started using the word exabyte to describe huge amounts of information.
At first, data was measured in kilobytes and megabytes. Over time, with better storage and faster networks, people moved up to gigabytes, then terabytes, then petabytes. When even petabytes were not big enough to describe global data and big cloud systems, exabytes became common in technology reports and research papers.
Symbol & Abbreviation
In computing and data storage there are two related units that can be confusing:
- Exabyte uses the symbol EB.
- Exbibyte uses the symbol EiB.
Important notes:
- EB uses steps of 1000 between each unit. This matches SI prefixes like kilo, mega, giga, tera, peta and exa.
- EiB uses steps of 1024 between each unit, which fits more directly with binary numbers inside computers.
- The SI prefix exa alone is written as E. But for exabyte we add B, so it becomes EB.
When reading a chart or device label, always look carefully to see if it says EB or EiB, because they are close in size but not the same.
Current Use Around the World
Exabytes are not usually used for home devices like phones or laptops. Those still use gigabytes and terabytes. Exabytes are used to talk about data at world scale and in very large systems.
Common areas where exabytes appear:
- Global internet traffic: Reports might say that people around the world send many exabytes of data through the internet each month.
- Cloud storage platforms: Big companies that run cloud services store user files, backups and logs that together can reach exabyte levels.
- Large data centers: Some data centers that serve video platforms, social networks or research projects may hold data measured in exabytes.
- Scientific research: Areas like climate science, astronomy and genetics create huge data sets that can add up to many petabytes and may grow into exabytes.
- Backup and archiving: National libraries, government archives and large companies often plan capacity using exabyte scale goals.
Because digital data grows fast every year, exabytes are now a normal unit when people talk about total data in the world and in very large networks.
Example Conversions
Below are simple examples using the decimal system, where each step is multiplied or divided by 1000.
From Exabytes to Smaller Units
- Exabytes to petabytes
1 EB = 1,000 PB
2 EB = 2,000 PB
0.5 EB = 500 PB - Exabytes to terabytes
1 EB = 1,000,000 TB
0.1 EB = 100,000 TB
3 EB = 3,000,000 TB - Exabytes to gigabytes
1 EB = 1,000,000,000 GB
0.01 EB = 10,000,000 GB - Exabytes to bytes
1 EB = 1,000,000,000,000,000,000 bytes
0.002 EB = 2,000,000,000,000,000 bytes
From Smaller Units to Exabytes
- Petabytes to exabytes
Rule: divide by 1,000
500 PB ÷ 1,000 = 0.5 EB
2,500 PB ÷ 1,000 = 2.5 EB - Terabytes to exabytes
Rule: divide by 1,000,000
1,000,000 TB ÷ 1,000,000 = 1 EB
250,000 TB ÷ 1,000,000 = 0.25 EB - Gigabytes to exabytes
Rule: divide by 1,000,000,000
5,000,000,000 GB ÷ 1,000,000,000 = 5 EB
750,000,000 GB ÷ 1,000,000,000 = 0.75 EB
Bits and Exabytes
Sometimes data size is shown in bits instead of bytes.
- 1 byte = 8 bits
- 1 EB = 1,000,000,000,000,000,000 bytes
- So 1 EB in bits = 8,000,000,000,000,000,000 bits
Related Units
Here are units that are smaller or larger than an exabyte, in the decimal system:
- Gigabyte (GB) about 1 billion bytes, used for files and small storage devices.
- Terabyte (TB) about 1,000 GB, used for hard drives and SSDs.
- Petabyte (PB) about 1,000 TB, used for large servers and data centers.
- Exabyte (EB) about 1,000 PB, used for very large systems and world scale data.
- Zettabyte (ZB) about 1,000 EB, used to describe total global data or big internet traffic numbers.
- Yottabyte (YB) about 1,000 ZB, a future size unit for data even larger than we commonly store today.
Matching binary style units are:
- Gibibyte (GiB)
- Tebibyte (TiB)
- Pebibyte (PiB)
- Exbibyte (EiB)
These binary units use steps of 1024 and are often used deep inside computer systems or in technical documents.
FAQs
How big is 1 exabyte compared with things I know?
1 exabyte is much bigger than what most people ever use. For example, if a high quality movie takes about 5 gigabytes, then 1 exabyte could hold about 200 million such movies.
Do normal computers or phones store data in exabytes?
No. Home devices usually have storage in gigabytes or terabytes. Exabytes are used for huge data centers, cloud platforms and total data across many systems, not for single personal devices.
Why are there both exabytes and exbibytes?
Exabytes use steps of 1000 and match the SI standard. Exbibytes use steps of 1024 and match the binary system inside computers. The two units are very close but not exactly the same.
Which one do internet and cloud companies usually mean?
Most internet and cloud companies use the decimal form. When they say EB or exabyte in reports, they usually mean 1 EB equals 1,000,000,000,000,000,000 bytes.
How many terabytes are in an exabyte?
In the decimal system, 1 exabyte equals 1,000,000 terabytes. That is one million terabytes.
What comes after an exabyte?
After an exabyte comes a zettabyte (ZB). 1 zettabyte equals 1,000 exabytes. After that comes a yottabyte (YB), which equals 1,000 zettabytes.
Is all the data in the world measured in exabytes?
Today, total global data is usually measured in zettabytes, which are even larger than exabytes. But exabytes are still used to describe big parts of that total, such as certain regions or types of data.
Why is understanding exabytes useful?
Understanding exabytes helps you grasp how large modern data systems are, how fast digital information is growing, and why we need strong storage, backup and network solutions around the world.