Although the hours within a given day were approximately equal, their lengths varied during the year, with summer hours being much longer than winter hours. The next-generation sundial likely formed the first representation of what we now call the hour. This division reflected Egypt's use of the duodecimal system-the importance of the number 12 is typically attributed either to the fact that it equals the number of lunar cycles in a year or the number of finger joints on each hand (three in each of the four fingers, excluding the thumb), making it possible to count to 12 with the thumb. A T-shaped bar placed in the ground, this instrument was calibrated to divide the interval between sunrise and sunset into 12 parts. As early as 1500 B.C., the Egyptians had developed a more advanced sundial. The first sundials were simply stakes placed in the ground that indicated time by the length and direction of the resulting shadow. Thanks to documented evidence of the Egyptians' use of sundials, most historians credit them with being the first civilization to divide the day into smaller parts. The civilizations that first divided the day into smaller parts, however, used different numeral systems, specifically duodecimal (base 12) and sexagesimal (base 60). In today's world, the most widely used numeral system is decimal (base 10), a system that probably originated because it made it easy for humans to count using their fingers. Lombardi, a metrologist in the Time and Frequency Division at the National Institute of Standards and Technology in Boulder, Colo., takes the case. You can download a free trial of Virtual TimeClock without any cost or obligation.Michael A. You can even access timecard data collected from multiple computers or location with our Virtual TimeClock Network edition. Virtual TimeClock can also track overtime, breaks & lunches, projects and more. The reporting features in Virtual TimeClock enable you to easily view reports either as Hours and Minutes for timecard review or Decimal Hours format for payroll. Our Virtual TimeClock software impartially records employee start, stop and break times in real-time. The calculator then computes the daily and weekly time totals in decimal format. Our Free Time Card Calculator allows you to enter employee start, stop and break times in Hours and Minutes format. Decimal hours are limited to displaying two decimal places, so the repeating 3 is rounded so that 56 minutes (:56) is expressed in decimal format as. Using our example of 56 minutes, we simply divide by 60 minutes: 56/60 = .93333333. The chart above simply converts minutes from base 60 to base 10. 75 hoursīut what about non-intuitive times? How do I convert 7:56 (seven hours and 56 minutes) to decimal time? Using the Time Conversion Chart below, we discover that 7:56 = 7.93 hours. Some time conversions (like the one above) are intuitive. 5 decimal time before I multiply by my hourly wage. For example, how much have I earned if I make $10 per hour and work 7:30? I must convert 30 minutes to. When thought of in this way, it is not hard to understand that 7:30 (hours and minutes) = 7.5 decimal hours.Įxpressing time in decimal format is essential for payroll because wages must be calculated using standard decimal numbers. So in decimal format this is expressed as 7.5 hours (7 and a half hours). Using our 7:30 example above, we intuitively know that 30 minutes is 'half an hour.' In decimal format one-half is expressed as '.5'. When we use decimal numbers each place in a number ranges from 0-9. The decimal hours format uses 'base 10' to represent time as common decimal numbers. 7:30 is read as 'seven hours and 30 minutes.' When we use this common expression of time we understand that it means seven periods of 60 minutes (7 hours) and one period of 30 minutes. So whenever we see time expressed with a colon (:) we know that we are seeing time in the hours and minutes format. Instead, we increase the hours by one and reset the minutes to zero and write 4:00. We express hours (60 minutes) and portions of an hour (minutes) with the format HH:MM. So when time is increased by one minute at 3:59, we don't write 3:60. By this we mean that time is expressed in 60 one minute units. The hours & minutes format uses 'base 60' to represent time. Note: Wondering if your totals are accurate? Read our brief article about the accuracy of totals > Are you interested in how time is properly converted from hours and minutes to decimal format for payroll? We'll review and compare these two common formats for displaying and expressing time.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |