Asked by: Sona Simonsky
Asked in category: technology and computing, information and network security
Last Updated: 23rd Jul 2024

What are the prefixes for SI units?

Example of SI derived units expressed as base units
Multiplying Factor SI Prefix Scientific Notation
0.1 deci (d) 10-1
0.01 centi (c) 10-2
0.001 milli (m) 10-3
0.000 001 micro (Au) 10-6



What are the prefixes that SI units use?

The metric system of measurement allows for the designation of multiples or subdivisions of any unit by adding to the name of the unit the prefixes hecto, deka, and kilo meaning respectively 10, 100, 1000 and deci, centi and milli. These mean, respectively, one tenth, one hundredth, and one-thousandth.

You may also wonder what a prefix unit is. A unit prefix, or mnemonic, is a significator or mnemonic that is added to units of measurement to indicate multiples of or fractions of those units. Units are often formed using such prefixes. Binary prefixes are often used in information technology. They are based on powers that two.

Also, asked: What are the SI prefixes? And what are their values?

SI prefixes

prefix symbol Value
Centi c 10-2
milli m 10-3
micro [footnote 2] 10-6
nano n 10-9

What is the prefix to 10 6?

Table 5. Table 5.

Factor Name Symbol
10-1 Decim d
10-2 Centi c
10-3 milli m
10-6 micro Au