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

```

```
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.

- Doctor Jaffee, The Math Forum
http://mathforum.org/dr.math/
```
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
Math Forum Home || Math Library || Quick Reference || Math Forum Search