Updated: 12/10/2023 by Computer Hope
Metric prefixes including zetta

Zetta (Z) is a prefix used with the metric system that equals 1021, or 1,000,000,000,000,000,000,000 (sextillion). A good example of where this prefix is used with computers is with a ZB (zettabyte). The zetta prefix was added as an SI (Systems of Units) in 1991.

What is smaller than a zetta?

With SI prefixes, exa is smaller than zetta.

What is larger than a zetta?

With SI prefixes, yotta is larger than zetta.

What is zetta's decimal equivalent?

A zepto (z) is the prefix used for 10-21.

Measurements, SI, Z, Zettabyte