1. Size : in meters (`m`) 2. Position: in meters (`m`) 3. Color: Frequency of EM wave, in Hertz (`1/s`) 4. When: in Seconds (`s`) 5. Weight: in Newtons (`N` or `kg•m//s^2`) 6. Mass: in Kilograms (`kg`) 7. Density: in Mass per volume (`kg//m^3`) 8. Temperature: in Kelvin degree (`K`) 9. Conductivity: in Amperes (`A`) 7 Fundamental Quantities

symbol	meaning	units	SI unit	basic SI units
l	Length	meter	`m`	`m`
m	Mass	Kilogram	`kg`	`kg`
t	Time	second	`s`	`s`
I	Electric current	ampere	`A`	`A`
T	Temperature	Kelvin	`K`	`K`
n	Amount of substance	Mole	`mol`	`mol`
lv	Luminous intensity	candela	`cd`	`cd`

SI fundamental units

In 1960, an international committee established a set of standards for the fundamental quantities of science. It is called the SI (Système International) fundamental units.

Meaning	SI Units	Basic SI Units
Length	`m`	`m`
Mass	`kg`	`kg`
Time	`s`	`s`
Speed	`m//s`	`m//s`
Force	`N`	`kg•m//s^2`