This calculator allows you to convert from Hour (sidereal) to Second and in a reverse direction. To convert from Hour (sidereal) to Second, enter the amount of Hour (sidereal) into the first input and to convert from Second to Hour (sidereal), enter the amount of Second into the second input.
20 Hour (sidereal) = 71803.408333334 Second
Hour (sidereal) to Minute | Hour (sidereal) to Hour | Hour (sidereal) to Week | Hour (sidereal) to Month | Hour (sidereal) to Year |20 Hour (sidereal) equal 71803.408333334 Second.
Every 1 Hour (sidereal) = 3590.1704166667 Second and so, 20 Hour (sidereal) = 20 multiplied by 3590.1704166667 = 71803.408333334 Second.
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 Hour (sidereal) = 35901.704166667 Second |
| 11 Hour (sidereal) = 39491.874583333 Second |
| 12 Hour (sidereal) = 43082.045 Second |
| 13 Hour (sidereal) = 46672.215416667 Second |
| 14 Hour (sidereal) = 50262.385833334 Second |
| 15 Hour (sidereal) = 53852.55625 Second |
| 16 Hour (sidereal) = 57442.726666667 Second |
| 17 Hour (sidereal) = 61032.897083334 Second |
| 18 Hour (sidereal) = 64623.0675 Second |
| 19 Hour (sidereal) = 68213.237916667 Second |
| 20 Hour (sidereal) = 71803.408333334 Second |
| 21 Hour (sidereal) = 75393.57875 Second |
| 22 Hour (sidereal) = 78983.749166667 Second |
| 23 Hour (sidereal) = 82573.919583334 Second |
| 24 Hour (sidereal) = 86164.09 Second |
| 25 Hour (sidereal) = 89754.260416667 Second |
| 26 Hour (sidereal) = 93344.430833334 Second |
| 27 Hour (sidereal) = 96934.60125 Second |
| 28 Hour (sidereal) = 100524.77166667 Second |
| 29 Hour (sidereal) = 104114.94208333 Second |
| 30 Hour (sidereal) = 107705.1125 Second |
