The Math Forum

Ask Dr. Math - Questions and Answers from our Archives
Associated Topics || Dr. Math Home || Search Dr. Math

Converting Clock Time to a Decimal

Date: 06/04/99 at 21:20:59
From: Mike Lopez
Subject: Converting clock time to decimals

I need the formula for converting a time range to a decimal. For 
example: 2:00-2:45 = .75  

Please help!

Date: 06/04/99 at 22:16:31
From: Doctor Jaffee
Subject: Re: Converting clock time to decimals

Hi Mike,

The key to solving your problem is realizing that you have to use the 
fact that there are 60 minutes in an hour. For example, 30 minutes is 
half an hour because 30/60 = 1/2. Furthermore, 1 divided by 2 is 0.5, 
the decimal value.

50 minutes is 50/60 of an hour and 50 divided by 60 is .833333... 
So, in general, take however many minutes you have and divide by 60 
and you will have the decimal value of that amount of time.

I hope this is helpful.

- Doctor Jaffee, The Math Forum   
Associated Topics:
Elementary Calendars/Dates/Time
Elementary Fractions

Search the Dr. Math Library:

Find items containing (put spaces between keywords):
Click only once for faster results:

[ Choose "whole words" when searching for a word like age.]

all keywords, in any order at least one, that exact phrase
parts of words whole words

Submit your own question to Dr. Math

[Privacy Policy] [Terms of Use]

Math Forum Home || Math Library || Quick Reference || Math Forum Search

Ask Dr. MathTM
© 1994- The Math Forum at NCTM. All rights reserved.