MatChar SI units

Name all base units

Length L

Mass M

Time T

Electrical current I

Thermodynamic Temperature Theta

Amount of substance N

Luminous intensity I_v

Coherent derived units

product of powers includes no numerical factor other than one

Meter m

length of the path travelled by light in vacuum in 1/3^×10⁸ seconds

Kilogram kg

unit of mass, defined by taking a fixed numerical value of the Planck constant h to be 6.626×10^-34 kg m² s^-1

Second s

duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the ¹³³Cs atom

Ampere A

constant current which describes the flow of 1/1.602×10^-19 times the elementary change e per second

Kelvin K

defined by setting the fixed numerical value of the Boltzmann constant k to 1.381×10^-23 J K^-1

Mole mol

amount of substance of exactly 6.022×10²³ (Avogadro number) elementary entities (must be specified)

Candela cd

luminous intensity, in a given direction, of a soure that emits monochromatic radiation of frequency 540×10¹² Hz and that has a radiant intensity in that direction of 1/683 Watt per steradiaan

10¹

Deka da (D)

10²

Hecto h (H)

10³

Kilo k (K)

10⁶

Mega M

10⁹

Giga G

10¹²

Tera T

10¹⁵

Peta P

10¹⁸

Exa E

10²¹

Zetta Z

10²⁴

Yotta Y

10^-1

Deci d

10^-2

Centi c

10^-3

Milli m

10^-6

Micro µ

10^-9

Nano n

10^-12

Pico p

10^-15

Femto f

10^-18

Atto a

10^-21

Zepto z

10^-24

Yocto y