Calculating the difference between two times

[Laird]

I'm having difficulty getting Excel 2003 to subtract times. It seems to me that this should be easy, so probably I'm just making a mistake.

In Col A I have my arrival time (eg. 08:30)
- formula bar shows 08:30 AM

In Col B, I have departure time (which *might* be after midnight, but let's keep it simple for this example), eg. (23:00)
- formula bar shows 11:00 PM

I want to see the difference between the two times, which would be fifteen-and-a-half hours.

So, in Col C, I want a formula that will show Total Time On Site in Hours.Fraction-of-hour:

=B1-A1

Excel returns "0.3"

=Text(B1-A1,"hh")

Excel returns only "15" (not 15.5)

=Text(B1-A1,"hh.mm")
Excel returns 15.30 (not 15.5)

Q1. Advice on this problem?
Q2. Any thoughts about how to handle time differences that go beyond midnight?

 

[VoG]

Hello and welcome to MrExcel. Does this help?

<b>Sheet10</b><br /><br /><table border="1" cellspacing="0" cellpadding="0" style="font-family:Calibri,Arial; font-size:11pt; background-color:#ffffff; padding-left:2pt; padding-right:2pt; "> <colgroup><col style="font-weight:bold; width:30px; " /><col style="width:64px;" /><col style="width:64px;" /><col style="width:64px;" /></colgroup><tr style="background-color:#cacaca; text-align:center; font-weight:bold; font-size:8pt; "><td > </td><td >A</td><td >B</td><td >C</td></tr><tr style="height:18px ;" ><td style="font-size:8pt; background-color:#cacaca; text-align:center; " >1</td><td style="text-align:right; ">08:30</td><td style="text-align:right; ">23:00</td><td style="text-align:right; ">14.5</td></tr><tr style="height:18px ;" ><td style="font-size:8pt; background-color:#cacaca; text-align:center; " >2</td><td style="text-align:right; ">23:30</td><td style="text-align:right; ">07:15</td><td style="text-align:right; ">7.75</td></tr></table><br /><table style="font-family:Arial; font-size:10pt; border-style: groove ;border-color:#00ff00;background-color:#fffcf9; color:#000000; "><tr><td ><b>Spreadsheet Formulas</b></td></tr><tr><td ><table border = "1" cellspacing="0" cellpadding="2" style="font-family:Arial; font-size:9pt;"><tr style="background-color:#cacaca; font-size:10pt;"><td >Cell</td><td >Formula</td></tr><tr><td >C1</td><td >=(MOD<span style=' color:008000; '>(B1-A1,1)</span>)*24</td></tr><tr><td >C2</td><td >=(MOD<span style=' color:008000; '>(B2-A2,1)</span>)*24</td></tr></table></td></tr></table> <br />Excel tables to the web - Excel Jeanie Html 4

 

[PCL]

Well, VogII shoot faster than me.

=(MOD(B1-A1,1))

With a custom format

h "h" mm

 

[simsy]

This site is good for time/date stuff, (Well lots of stuff actually!);

http://www.cpearson.com/Excel/datearith.htm

What you could do is format the cell where you have the calculation as "number", with 2 decimal places, and multiply is by 24, (which converts the number to hours...)

eg

A2 = 08:00
B2 = 23:30
C2 = (B2-A2)*24

Does this help?

Regards,

Simsy

 

[PCL]

Yes nice site.
Thank you Simsy.