Zettabytes (ZB) to Gigabytes (GB) Converter
Convert zettabytes to gigabytes.
1 ZB = 1,000,000,000,000 GB
How to convert ZB to GB
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 Gigabyte is 109 bytes. Divide one by the other and you get the ratio between the two units: 1021 ÷ 109 = 1012.
Zettabyte is the bigger unit, so you multiply. Every ZB holds 1012 GB, 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
GB = ZB × 10121 ZB = 1,000,000,000,000 GB1012 means 1 followed by 12 zeros
Worked example 1: Converting 1 ZB
1 ZB × 1012 = 1,000,000,000,000 GBThe decimal point moves 12 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 × 1012 = 500,000,000,000 GBThe decimal point moves 12 places to the right.
Worked example 3: Converting 12.75 ZB
12.75 ZB × 1012 = 12,750,000,000,000 GBThe decimal point moves 12 places to the right.
Need the other direction? Open the GB to ZB converter.
ZB to GB examples
Analysts quote the total data created worldwide in a year in zettabytes. In gigabytes that is 1,000,000,000,000 GB.
| ZB | GB |
|---|---|
| 1 ZB | 1,000,000,000,000 GB |
| 2.5 ZB | 2,500,000,000,000 GB |
| 10 ZB | 10,000,000,000,000 GB |
| 50 ZB | 50,000,000,000,000 GB |
| 100 ZB | 100,000,000,000,000 GB |
| 500 ZB | 500,000,000,000,000 GB |
| 1,000 ZB | 1 × 1015 GB |
Where ZB to GB 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 gigabyte is 1,000 megabytes, about 250 photos at 4 MB each. Gigabytes are the language of phone storage, RAM, mobile data plans, game installs and USB sticks.
Going from zettabytes down to gigabytes 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 GB FAQ
How many gigabytes are in 1 zettabyte?
There are 1012 gigabytes in 1 zettabyte, so 1 ZB = 1012 GB.
Is ZB to GB 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 GB to ZB?
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.