This calculator allows you to convert from Second to Hour (sidereal) and in a reverse direction. To convert from Second to Hour (sidereal), enter the amount of Second into the first input and to convert from Hour (sidereal) to Second, enter the amount of Hour (sidereal) into the second input.
20 Second = 0.0055707661973799 Hour (sidereal)
Second to Minute | Second to Hour | Second to Week | Second to Month | Second to Year |20 Second equal 0.0055707661973799 Hour (sidereal).
Every 1 Second = 0.00027853830986899 Hour (sidereal) and so, 20 Second = 20 multiplied by 0.00027853830986899 = 0.0055707661973799 Hour (sidereal).
What is the second?
The second is an important unit of time. It is the main unit of time in the SI system of units. It can be defined as the time it takes an electromagnetic field to propagate through 3 x 10 5 km of vacuum.
One solar day has 86,400 seconds. There are 60 second per minute.
Second is not small and specific enough to be used by scientists and engineers so smaller units were derived such as:
| 10 Second = 0.0027853830986899 Hour (sidereal) |
| 11 Second = 0.0030639214085589 Hour (sidereal) |
| 12 Second = 0.0033424597184279 Hour (sidereal) |
| 13 Second = 0.0036209980282969 Hour (sidereal) |
| 14 Second = 0.0038995363381659 Hour (sidereal) |
| 15 Second = 0.0041780746480349 Hour (sidereal) |
| 16 Second = 0.0044566129579039 Hour (sidereal) |
| 17 Second = 0.0047351512677729 Hour (sidereal) |
| 18 Second = 0.0050136895776419 Hour (sidereal) |
| 19 Second = 0.0052922278875109 Hour (sidereal) |
| 20 Second = 0.0055707661973799 Hour (sidereal) |
| 21 Second = 0.0058493045072489 Hour (sidereal) |
| 22 Second = 0.0061278428171179 Hour (sidereal) |
| 23 Second = 0.0064063811269869 Hour (sidereal) |
| 24 Second = 0.0066849194368559 Hour (sidereal) |
| 25 Second = 0.0069634577467249 Hour (sidereal) |
| 26 Second = 0.0072419960565938 Hour (sidereal) |
| 27 Second = 0.0075205343664628 Hour (sidereal) |
| 28 Second = 0.0077990726763318 Hour (sidereal) |
| 29 Second = 0.0080776109862008 Hour (sidereal) |
| 30 Second = 0.0083561492960698 Hour (sidereal) |
