How to Calculate Time in Decimals

The decimal system represents time in base 10 form.
••• Photos.com/PhotoObjects.net/Getty Images

Time is traditionally expressed in hours, minutes and seconds. This format is convenient for general use, but is inappropriate in mathematical operations. Calculations typically require the expression of a time interval in decimal form. For instance, 30 minutes equal 0.5 hour and 45 seconds equal 0.75 minute. As an example, we will convert 5 hours, 27 minutes, 56 seconds to decimal form.

    Record the integer number of hours of the time given. In this example, it is 5.

    Divide the number of minutes by 60 to convert them into a fraction of an hour. In our example, it is 27/60 = 0.45.

    Divide the number of seconds by 3,600 to calculate them as a fraction of an hour. This is because there are 60 seconds in a minute and 60 minutes in an hour. In our example we have 56/3600= 0.0156.

    Sum the values from Steps 1 to 3 to obtain the answer. In our example, 5 hours, 27 minutes, 56 seconds corresponds to 5 + 0.45 + 0.0156 = 5.4656 hours.

Related Articles

How to Convert Hours & Minutes to Decimals
How to Read a Time Clock in Hundredths of an Hour
How Do I Calculate Minutes Into a Fraction of an Hour?
How to Measure Time in Hundredths of an Hour
How to Convert KWH to KVA
How to Convert an Angle to a Decimal
How to Calculate Time-Weighted Averages
How to Convert Seconds Into Miles Per Hour
How to Convert a Decimal to Hours & Minutes
How to Add Minutes & Hours
How to Calculate Time Math
How to Convert Kilometers to Hours
How to Convert a Degree in Decimal Degree Form to Degree-Minute-Second...
How to Convert HVAC Tons to Amps
How to Convert Minutes to Hundredths of a Minute
How to Convert PPH to GPM
How to Fill in Missing Numbers for Fractions
How to Calculate Volume of a Rectangular Prism
How to Calculate Time With 100 Minute Clock
How to Divide Polynomials By Monomials