In 2022, the metric system gained two new prefixes: quecto and quetta. They sit at opposite ends of the size spectrum.
What is quecto?
Quecto (symbol: q) means 10-30. That is a decimal point followed by 29 zeros and then a 1. It is used for unimaginably small quantities, like tiny fractions of physical constants or particle-scale values.
What is quetta?
Quetta (symbol: Q) means 1030. That is a 1 followed by 30 zeros. It is used for extremely large quantities, such as data storage or planetary-scale masses.
Why do we need them?
Science and technology keep pushing limits in both directions: from quantum physics to massive data centers and astronomy. Having official prefixes like quecto and quetta helps us talk about these extremes with clear, standardized language.
Quick comparison
- Quecto (q): 10-30, extremely small
- Quetta (Q): 1030, extremely large
In short, quecto is for the almost unimaginably tiny, and quetta is for the almost unimaginably huge.