Quettabytes (QB) to Exabytes (EB) Converter
Convert quettabytes to exabytes.
1 QB = 1,000,000,000,000 EB
How to convert QB to EB
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Quettabyte is 1030 bytes and 1 Exabyte is 1018 bytes. Divide one by the other and you get the ratio between the two units: 1030 ÷ 1018 = 1012.
Quettabyte is the bigger unit, so you multiply. Every QB holds 1012 EB, which means the decimal point moves 12 places to the right.
On the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB) these two are 4 steps apart. Every step is a factor of 1,000, so 4 steps means 1,000 multiplied by itself 4 times, which is 1012.
The formula
EB = QB × 10121 QB = 1,000,000,000,000 EB1012 means 1 followed by 12 zeros
Worked example 1: Converting 1 QB
1 QB × 1012 = 1,000,000,000,000 EBThe decimal point moves 12 places to the right.
The quettabyte is the largest SI-prefixed byte unit, and nothing stores data at that scale.
Worked example 2: Converting 0.5 QB
0.5 QB × 1012 = 500,000,000,000 EBThe decimal point moves 12 places to the right.
Worked example 3: Converting 12.75 QB
12.75 QB × 1012 = 12,750,000,000,000 EBThe decimal point moves 12 places to the right.
Need the other direction? Open the EB to QB converter.
QB to EB examples
The quettabyte is the largest SI-prefixed byte unit, and nothing stores data at that scale. In exabytes that is 1,000,000,000,000 EB.
| QB | EB |
|---|---|
| 1 QB | 1,000,000,000,000 EB |
| 2.5 QB | 2,500,000,000,000 EB |
| 10 QB | 10,000,000,000,000 EB |
| 50 QB | 50,000,000,000,000 EB |
| 100 QB | 100,000,000,000,000 EB |
| 500 QB | 500,000,000,000,000 EB |
| 1,000 QB | 1 × 1015 EB |
Where QB to EB comes up
Quetta- is the SI prefix for 1030, also adopted in 2022, so a quettabyte is 1,000 ronnabytes. Quettabytes are the top of the official SI ladder. They turn up in unit tables and in explanations of the newest prefixes.
An exabyte is 1,000 petabytes, or a billion gigabytes. Exabytes describe traffic across whole networks, national-scale archives and industry forecasts, not any single file or drive.
Going from quettabytes down to exabytes 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.
QB to EB FAQ
How many exabytes are in 1 quettabyte?
There are 1012 exabytes in 1 quettabyte, so 1 QB = 1012 EB.
Is QB to EB 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 QB the gap is wider still.
How do I convert EB to QB?
Go the other way: divide by 1012, which moves the decimal point 12 places to the left. The swap button on the converter does it for you.