![]() You will find a variety of formulas to change time to hours, minutes or seconds as well as convert text to time and vice versa.īecause Microsoft Excel uses a numeric system to store times, you can easily turn hours, minutes and seconds into numbers that you can use in other calculations. 2011.The tutorial demonstrates different ways to convert time to decimal in Excel. Wikipedia, The Free Encyclopedia, last visited 26 Jun. " Conversion of units" Wikipedia, The Free Encyclopedia. Lide, David R., Daniel (Editor-in-Chief).ĬRC Handbook of Chemistry and Physics, 89th Edition, New York, NY: CRC Press, p. 1-28, 2008. The NIST Guide for the Use of the International System of Units - Appendix B, subsectionsī.8 Factors for Units Listed Alphabetically andī.9 Factors for units listed by kind of quantity or field of science. The National Institute of Standards and Technology (NIST). ![]() How Many? A Dictionary of Units of Measurement at accessed. Traditionally, observatories had clocks set to this sidereal cycle, and astronomers still use sidereal time in making telescope settings. The sidereal hour equals 59 minutes 50.17 seconds the sidereal minute equals 59.8362 seconds the sidereal second equals 0.997 270 second. Like the regular day it is divided into 24 sidereal hours, each sidereal hour being divided into 60 sidereal minutes and each sidereal minute into 60 sidereal seconds. ![]() The sidereal day equals 23 hours 56 minutes 4.090 54 seconds, or 86 164.090 54 seconds. Thus the sidereal day, the average interval between two successive risings of the same star, is shorter than the mean solar day (see day) by 1/366.242. We only count 365.242 because one rotation is cancelled out for us by our tour around the sun. If we could view the earth from outside the Solar System, we would see that it actually completes 366.242 rotations during one year (one revolution around the sun). Sidereal day: a unit of time used in astronomy, equal to the period of time in which the earth makes one rotation relative to the stars. To convert directly from minutes to hours you multiply by 0.01 6. Simplified, this is the same as multiplying by 60/3600 which is 0.016666667. To convert from minutes to hours multiply the number of minutes by 60 and then divide by 3600. Or you can find the simplified factor by dividing the conversion factor for A by the conversion factor for B. To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into seconds then divide by the factor for B to convert out of seconds.
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