The SI base unit second is the 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 cesium-133 atom.
Characteristic |
Description |
Dimension symbol (SI) |
T |
Quantity symbol (SI) |
t |
Table 1: Quantity brief
Unit name |
Symbol |
Conversion to base unit |
Relation to SI units |
|
SI |
day |
day |
* 3600 * 24 |
|
SI |
hour |
h |
* 60 * 60 |
|
SI |
minute |
min |
* 60 |
|
SI |
second |
s |
* 1 |
|
SI |
millisecond |
See SI prefixes |
||
SI |
microsecond |
|||
SI |
nanosecond |
|||
Table 2: Supported units. Basis units for a unit system are printed in boldface.
