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# Time Calculation ...

## Having been looking round this site for quite some time now and always finding what I needed I am now a registered member who needs your expertise. I have a spreadsheet for which I need to calculate hours worked depending on a few criteria. [data] ... The criteria is that Sat/Eve is 8pm to 6am weekdays and midnight to midnight on a saturday. Sun is midnight to midnight on a sunday, BH is a bank holiday and basic is everthing else. What I want to know is it these columns can be populated automatically using formulas. I would really appreciate it if someone out there is up to completing this challange, as I have to manually populate this at the moment and it can be 5000+ lines long (it takes hours). If i need to change the layout it's not a problem, whatever it takes to automate it has got to be worth the effort.

Related Forum Messages:
Calculation Of Time With Two Different Time Formats
Need a point in the right direction with this one! I want to calculate the difference between two time values, the problem is there two different formats as below:-

1) 520.00 - this is a number format

2) 500:00:00 - this is a time format HHH MM SS

What could I use to show I have a 20.00 hour difference???

Calculation On Time
I have been burning brain cells trying to figure this out.
I get these numbers from an online source and they come in like this:

A B C D E
1/1/0912:01AM02:40AM11:18AM07:55PM

The times do not come in as times...when I format the cell to time it doesnt change...that is my first problem.

What I would need to do to these times is: take B and C and find what time is in the middle of them and put that in a different column.

This mess will also need to be plotted on a chart with time by the minute for one day as the X axis. In my example I drew lines on the chart to show what I mean....the blue lines I dont want charted...I use those to find the time in the middle.

Same Time Calculation
I am trying to get a total column that will give the total only when two particular devices are down at the same time. This total will be taken from a long list of downtime entries for different devices but I only want the total when two particular devices are down, for example

Devicedatedowntimedateuptimetotal time
102/01/0911:00:0002/01/0911:09:0000:09:00
202/01/0911:00:0002/01/0911:04:0000:04:00
202/01/0902/01/09
103/01/0903/01/09
303/01/0903/01/09
604/01/0904/01/09
204/01/0913:09:0004/01/0913:12:0000:03:00
104/01/0913:02:0004/01/0913:15:0000:13:00
505/02/0905/02/09
total 1/200:07:00

In the example I am just wanting to work out the total time when both device 1 and 2 were down at the same time, above the total would be 7 minutes because for 4 minutes on the 2/1/9 and 3 minutes on the 4/1/9 they were down at the same time.

Hh:mm:ss Time Calculation
i need to total a range of cells, however, these contain time values; hh:mm:ss. it shows me the total when all cells are highlighted. but =sum() doesn't work.

Time Calculation
I have a time card sheet that I want to make automatically calculate the time I have worked. It is set up with four columns that can't be changed. The first column is "Time In(TI)", second column "Time Out(TO)", Third column "Time Taken For Lunch(TTFL)", and Finally "Hours Worked". I have no problem getting the formula to calculate the difference in "Time In" and "Time Out" but taking the 30 minutes out of that is causing a rift. If I put the 30 minutes in 00:30:00 format it will take it but it thinks it's 12:30:00 and it displays in 00:30:00 which I want it to display 30. Just to clarify, I am using =(TI-TO)-TTFL in the Hours Worked cell.

Calculation Of Time Formula
I am trying to calculate the response time between when a phone call comes into my workplace and when the responder calls back...I have created a formula that does this using the times and dates of when the calls were recieved and went back out. This works except when the call comes in on one day and goes back later in the day the next day, making the response time larger than 24 hours. I also have it set up to eliminate 15 and a half hours from the calculation because our place of business is not open during this time. Further details....

The formula currently being used is... =IF(G50=E50, H50-F50+(H50

Time Conversion/calculation
I need a formula that will calc the following: using Excel XP

#MIN.
INLUNCHOUTHRS
8:00 AM04:00 PM 8.00
8:00 AM304:30 PM 8.00
8:00 AM304:30 PM 8.00
8:00 AM304:00 PM 7.50
8:00 AM605:00 PM 8.00

Variable Time Calculation
[code] ......

=SUMIF(\$A:\$A,">="&TODAY()-1,D:D)-SUMIF(\$A:\$A,">"&TODAY(),D:D) calculates the total in Col D looking back from today. The results gives you 12:00. What I need is a formula that will look back from the current time to 24 hours in the past, NOT 1 day, to calculate the total in Col D. Looking back 24 hours, from 10:00am, the results would be 6:00.

Since the first time on 12/12 has not arrive, it will not calculate it, but will look back from 10:00am on 12/12 to 10:00am on 12/11 and calculate a result of 6:00 hours.

Time Spent Calculation
I need to find out the total time an issue was 'open' (not resolved) during business hours. Issues come in and resolution time is based off of a priority. Priority 1 should be resolved in one hour, Priority 2 should be resolved in 4 hours, Priority 3 should be resolved in 1 business day (8 hrs), Priority 4 should be resolved in 2 business days (16 hrs), Priority 5 should be resolved in 5 business days (40 hrs), Priority 6 should be resolved in 10 business days (80 hours).

I have start dates/times field in a column (mm/dd/yyyy hh:mm) , a resolution dates/times field in another column (mm/dd/yyyy hh:mm) and a priority in another column (1-6). I need to calculate the time an issue is in open status (not resolved) based on it's priority but I need for it to take into consideration business hours (Monday thru Friday...7 am to 7 pm)...and not calculate time outside of 'business hours'.

How Do I Reduce Calculation Time
I am a big fan of huge files (30MB+) all interlinked with array formulas ...and lots of them. The problem is...one calculation take literally 5 hours. (I have one file I try to calculate since cca 4 hours now...it's at 63%)

I keep getting extra memory with no visible improvement on the processing time. Is there a trick out there that I can use? Something is clearly wrong.

I feel I will soon have to give up Excel, or my formulas, or my job ...

Formatting With Time Calculation
I have a calculation whereby I use two variables which are 1. Man hours left in the week formatted as [hh] and 2. Amount of work left to do in the week formatted as 0" Man Hrs" I need to carry out a calc which says:- Man hours left in the week - Amount of work left to do in the week.

The answer should tell me if I have a deficit or surplus of hours which can then use for planning purposes. Unfortunately the problem I have is that I can't make the formatting the same for both unless someone knows of a workaround.

Man hours left in the week = 128. Man hours required to complete all work this week = 224. Therefore I need to say 128-224 = -96. However when I do this this an answer of 16 is returned.

Textbox Time Calculation
I'm attempting to calculate the total number of hours between a start time and end time using textboxes on a Userform.

Here is my latest attempt:

Private Sub D24_Exit(ByVal Cancel As MSForms.ReturnBoolean)
Dim myvalue As String
Dim myhour As String
Dim myminutes As String

myvalue = D24.Value

Select Case Len(D24)
Case 1
myhour = "0" & Mid(myvalue, 1, 1)
myminutes = "00"
Case 2
myhour = Mid(myvalue, 1, 2)
myminutes = "00"
Case 3

The above codes are an attempt to force an entry as time (7, 07, 700, 0700=7:00 / 13, 1300=13:00 etc.). However, the result is not correct.

For example:
Start Time in Textbox(D24)=07:00
End Time in Textbox(D25)=17:30
Result in Textbox(D27)=0.4375
Desired Result in Textbox(D27)=10.5

I've never calculated times in textboxes,

Subtotals And Time Calculation
I am trying to calculate the time spent on each task.

I have column A with Task IDs and column B with Time. Column A could have the same task ID repeated but the column B has the time for each entry. There is only start time for each task.

Where the Task is repeated, want to know how many times the task has taken place and overall time spend on one task ID, calculating from the first entry to the last entry.

Time Calculation Formula
I have attached a time card that needs a formula to calculate the time for the high lighted areas.

In+out-in+out= total hours.

Time Calculation With Colored Cells
I was looking for a solution through the excel questions but could not find anything which would help me.

As you can see in column B are two different colored Sun, red and magenta as well as Mon and Tue.

I would like to find a formula or macro without creating an extra column which looks for the color magenta i.e. if the particular cells are magenta (Sun, Mon and Tue) then perform an action.

I cannot use the formula in K7.

******** ******************** ************************************************************************>Microsoft Excel - Time Calculation with color cells.xls___Running: 11.0 : OS = Windows XP (F)ile (E)dit (V)iew (I)nsert (O)ptions (T)ools (D)ata (W)indow (H)elp (A)boutE4F4H4K4E5F5H5K5E6F6H6K6E7K7E8K8K9E10F10H10K10K11K12E13F13H13K13E14K14E15K15E16K16E17F17H17K17E18H18K18=
ABCDEFGHIJK1Month: 2Working - Hours 15% 35% 3DayWeekdayStartEndHoursStartEndHoursStartEndHours414Fri20:000:0004:0020:000:0004:00 515Sat0:006:0006:000:006:0006:00 615Sat20:000:0004:0020:000:0004:00 716Sun0:006:0006:00 0:006:0006:00816Sun19:000:0005:00 19:000:0005:009?? 1022Sat20:000:0004:0020:000:0004:00 1123Sun0:006:00 0:006:0006:001223Sun19:000:00 19:000:0005:001324Mon0:005:0005:000:005:0005:00 1424Mon20:000:0004:00 20:000:001525Tue0:006:0006:00 0:006:001625Tue19:000:0005:00 19:000:001726Wed0:005:0005:000:005:0005:00 18 54:00 28:00 22:00Timesheet
[HtmlMaker 2.42] To see the formula in the cells just click on the cells hyperlink or click the Name box
PLEASE DO NOT QUOTE THIS TABLE IMAGE ON SAME PAGE! OTHEWISE, ERROR OF JavaScript OCCUR.

Time Calculation That Exclude Blanks
All I would like is to put the result of this Excel formula in the D column:

=TEXT(B10-C10,"mm:ss")

starting from row 10, provided that both B and C for the row exist (are nonblanks).

Calculation Time And Charge Rates
I am trying to figure out a formula to figure out how much to charge for hrs of a rental. There is an automatic \$1000 charge regardless of time used. the rate chart is as follows:

\$1000 + hourly charge = total

=<50 hrs= \$15/hr
>50hrs but <100hrs= \$6.50/hr
>100hrs=\$4.10/hr

ex: so is A1= 200hrs then i want B1 to equal \$1820.(\$1000 + (200 x 4.1))=1820.

I have an idea on how to write the formula, but i am having a little bit of trouble with it.

Time Calculation - Ignore Weekend
I would like to calculate Column D depending on below criteria.

1. if both date is same than normal Column C-Column B.
2. if both date is not same than time diifrence should not be count after 17:30 to next day 08:30.
3. I do not want to include weekend (SAT & SUN) time diffrence if both date have.

In column D I have filled two cells that I want by formula.

Calculating Time, Timesheet Calculation
I am working on a project involving calculating time. It is a timesheet calculation. I was able to design the following layout:

.....A............B..........C..........D.......E.....F
1....Date.........Time IN....Time OUT...Hours... Total
2....01/01/07.....1830.......1930.......01:00...01:00
3....01/02/07.....1930.......2330.......04:00...05:00
4....01/03/07......830.......1900.......10:30...15:30
5
Column A is formatted for DATE. Columns B and C are GENERAL. Columns D and E are DATE format customized as '[hh]:mm'

The formula to calculate the time difference between the numbers in column B and C is located in column D. It is as follows:
=IF(C4<1000,TIMEVALUE(LEFT(C4,1)&":"&RIGHT(C4,2)),TIMEVALUE(LEFT(C4,2)&":"&RIGHT(C4,2)))-IF(B4<1000,TIMEVALUE(LEFT(B4,1)&":"&RIGHT(B4,2)),TIMEVALUE(LEFT(B4,2)&":"&RIGHT(B4,2)))..................

Converting Long Time Calculation To UDF
I work with a lot of time based worksheets for a 24/7 operation and constantly use the formula:

=IF(\$E17>\$D17,(HOUR(\$E17)+(MINUTE(\$E17)/60))-(HOUR(\$D17)+(MINUTE(\$D17)/60)),((HOUR(\$E17)+24)+(MINUTE(\$E17)/60))-(HOUR(\$D17)+(MINUTE(\$D17)/60)))

to calculate times worked where \$D17 is start time and \$E17 is finish time. Shifts can start and finish the same day (\$E17>\$D17) or go past midnight (\$D17>\$E17).

To make matters even more interesting, there are a number of variables that require adding either "and" and/or "or" conditions to this formula so I can end up with several of these nested and it gets pretty complicated.

I'd like to have a UDF so I can just enter the formula:

=CalcTime(Start Time,Finish Time)

Date/Time Calculation For WeekEnds/After Business Hours
What calculation would I enter in a results cell if I wanted to find the delta between 2 times in date format that repersent just the business hours of 8am-5pm, therefore excluding after hours and weekends.

eg.

Date 1 Date 2 Result Time
23/07/07 8:00 24/07/07 14:55 15:55

So far I can't get the caluclation that will compensate for the after hours and week ends.

Time Calculation: Calculate How Many Hours Have Elapsed Between To Entries
I am trying to build a spreadsheet to calculate how many hours have elapsed between to entries; start time (H10) e.g. 9:15 AM and end time (I10) e.g. 12:15 PM. The formula that I am using in the calculation cell field (J10) is (I10-H10+(I10<H10))*24. This formula works great till I wish to include in an IF statement. What I would like is if the total hours calculated with the formula (I10-H10+(I10<H10))*24 is less than 4, return 4 (hours) otherwise the value. As well if there is no start time nor end time entered then return zero.

Retrieving Variable Rows From Another Worksheet: Reducing "Calculation Time"
I'm using this formula to pick all rows from a huge range of cells "DATA" in another sheet, by matching the first column value (SAPDATA is the range that contains all the first column cells of DATA).

{=IF(ROW(\$B49)-ROW(\$B\$48)>COUNTIF(SAPDATA,\$D\$4),"",INDEX(DATA,SMALL(IF(SAPDATA=\$D\$4,ROW(SAPDATA)),ROW(\$B49)-ROW(\$B\$48)),2))}

All possible first column values have been stored as a dropdown in cell D4, and whenever I change the choice in the dropdown cell, the retrieval of those hundreds of rows takes ages in excel.

The sum of (Monday!A1:A4) multiplied by the sum of (Monday!B1:B4) plus (Tuesday!A1:A4) multiplied by the sum of (Tuesday!B1:B4) and so on.

Display End Time Automatically Upon Entering Start Time And Time Usage
I have a worksheet which contains START TIME in column A, then TIME USAGE in column B and END TIME in column C. User enters start time, followed by the number of time usage in minutes, how could i possibly display the end time automatically in this scenario? how do you add the entered time usage to the start time to display the end time? Say if I enter 1:00 AM at start time and 00:15 minutes on time usage, how can 1:15 AM be displayed on the end time automatically?

Subtract Start Time From Finish Time Return Hours Worked As Number
I have a user form with textBox1 = start time (entered as "[h]:mm") and text Box2 = finish time (entered as "[h]:mm"). I would like textBox3 to display the difference between the start time and finish time as a general number!

For example
Start time: 21:00
Finish time: 06:30
Hours worked: 9.50

Start time: 12:30
Finish time: 23:00
Hours worked: 10.50

Copy Row If DATE & Time In Cell Is Between Time Span
I have a problem regarding sorting data having date and also time within a single cell.

Example data (I have written it as code to preserve formatting)

A B C D E F

12/5/2008 02:072/5/2008 06:0128804833363
22/5/2008 18:012/5/2008 18:0599271297

Column B is start date and time whereas Column C is end date and time.
My aim is to cut and paste the whole row automatically to Sheet2 if the time is within 2AM to 8AM else leave as it is.Also I don't know anything about VBA Script.

Dynamic Sum Function (number Of Sheets Can Vary From Time To Time)
I need a sum function in A1 of a "Total"-sheet that totals cell A1 in every sheet with a certain color on the tab. The number of sheets can vary from time to time.

Any idea about a dynamic sum function that will do this, in combination with VBA?

Count Function :: Vacation, Personal Time, & Sick Time
I am using the count function for attendance tracking of Vacation, Personal Time, & Sick Time. (Example: = COUNTIF(\$F6:\$CQ6, "V")

I need to be able to do half days. I have tried many different formulas/ways to incorporate the half day scenario even without using the count function with no success.

Time Stamp Macro Tell Total Elapsed Time From When I Started To When I Finished
I am not sure that I can do this, but here is what I would like to do. I have a worksheet that I initial when I start a job in on cell and then when I finish in another cell. What I's like is to have a macro running in the back ground that will tell me the total elapsed time from when I started to when I finished.

Automatically Change Cell (With Time) Color After Time Period Has Passed
I have a protected worksheet. Users wish to be able to track changes in the input cells. The suggested approach for this is to temporarily disable sheet protection and allow them to change the font color, then protect afterwards. What I would like to do is:

i) check whether they are in an input cell
ii) if so, then prompt the user with the 'Font Color' dialog box
iii) apply the font color selected to the input cell

I'm struggling to find the dialog box I need. I can launch the one to change the interior color, no problem (Application.Dialogs(xlDialogPatterns).Show). But that's no use to me, I just want a color palette that specifically relates to the Font Color

Table Which Shows Time Started, Time Finished And Then A Total For Hours That Day, Then That Week
i am looking to do a table which shows time started, time finished and then a total for hours that day, then that week.

Start 08:00
End 16:00
Total 8 hrs.

How can I get the total to display as 8 hrs? not 08:00? When I change the format to "number" it shows 0.33?

Add This Number To The Start Time, Factor In Break Minutes And Get To The Projected Completion Time
I am trying to provide a tool for department leaders to monitor productivity for order processing in their departments. The variables I have are: Number of orders(variable), number of pickers (variable), start time(variable). Then, I know each order takes 1 picker 4 minutes to pick on average, and there are 45 minutes worth of breaks during the picking process. So after entering the variables I used =(((C3*4)/60)/D3) to come up with the time needed to process the orders. What I can't get to is how to add this number to the start time, factor in break minutes and get to the projected completion time. I have Excel 2003 at work. Clearly I need to take a class!

Skip Weekends Adding Time To Date & Time
I need a formula to add just the time to ' date and time', ignoring weekends.

eg:

Fri 24-Aug-07 10:52 is the date and time

28:48:00 is the time

If I add the time to 'date and time', result is coming as Sat 25-Aug-07 15:40

But it should come as Mon 27-Aug-07 15:40 (hence ignoring weekend)

Count Number Of Full Time Periods Within A Time Period
I have thousands of timestamps that have a start & end date and time in 2 separate columns. (one named start and one named end...)

I also have numerous set time periods that i'm interested in.. (about a dozen or so)

for example 01/01/2008 - 05/01/2008, 07:30:00 - 10:00:00

What i need is to be able to count the number of times the full time period i am interested (07:30:00 - 10:00:00) in falls in between the thousands of start and end timestamps i have. The time periods must also fall within the date range specifed.

So if my timestamps were
Start: 01/01/2008 06:30:00 & End: 02/01/2008 11:00:00, based on the set time period above, there would be a count of 2

and if my timestamps were
Start: 01/01/2008 07:05:00 & End: 02/01/2008 09:00:00 there would be a count of zero as there is not a full uninterupted timeperiod 07:00:00 - 10:00:00 between these timestamps.

and if my timestamps were:
Start 01/01/2007 07:00:00 & End 02/01/2007 10:00:00 the count would be zer as this is a year early!

Using VBA To Get System Time In GMT Equivalent Instead Of Local Time
if there is a simple way to get the GMT equivalent in vba code. I am being a date/timestamp but realized that timezone differences may complicate matters, therefore I would like to "standardize" the timestamps into their GMT equivalent rather then using the computer's local time. I had been using

Delete Date & Time Cells Based On Time
I have a large dataset where the first column is date and time i.e. "20/01/2005 03:41:06" and I want to delete certain rows based on the times. I have already tried playing about with macro's but failed fairly spectacularly so far. I have code from someone else to delete cells if the value equals a certain time but this doesn't work as the cell contains the date too.

I have already recorded one macro to reformat the data to as the software return 10 timestamped samples per hour and I want 8 i.e. every three hours so there is constant separation for statistical purposes. Both the macros are shown below so you can see what I have.

Ideally I would like to replace the line - If (r.Cells(n, 1) = TimeValue("22:41:06")) ............ - with one that reads - If (r.Cells(n, 1) CONTAINS TimeValue........ - but I don't know if that is possible? If not is there a way to separate the time from the date into 2 columns and then I can delete rows based on the time column using the code below? .......

Format Date & Time Cell To Hide Time If 0:00
I have a Excel Dates & Times column where the time is not always used. In these cases the time is 12:00AM. Is there a way to Custom Formats the cell so that the time is only visible if it is not 12:00AM?

Run Macro Time: Start A Sub Running At A Selected Time
how to include a line of code, to start a sub running at a selected time? Given that the workbook is already opened before that time?

Automate Macro Start On Time & Stop At Later Time
Can I adapt this code so that users receive the alert if they try and go to the next field without filling in the required ones, or - better - to combine it with a code that does not run a macro, but instead gives the alert, if the required fields have been missed. (I don't require anything to do with printing, this was the closest code I could find)

Private Sub Workbook_BeforePrint(Cancel As Boolean)
If Sheet1. Range("A1").Value = "" Then
MsgBox "Cannot print until required cells have been completed!"
Cancel = True
End If
End Sub

Userform With Time Field Displays Time As Number
I have a userform that has a time field on it and then the userform displays the time as a number.

Ex. I entered 11:00 AM in the Time of Contact field and the form displays it as 0.458333333333333.

Run-time Error Every Other Time The Macro Runs
I'm not sure why this is happening, but every other time I run this one specific macro, I get a "Run-time error '1004': Paste method of Worksheet class failed". I even tried running this macro, then running a different one, then running this again, but I still got the error every other time.

Every time I get the error, it highlights this line of
Sheets("Regenerate Request").Paste

This is all of the code up to where I get the error:

Sub YesRegen()
' after user has hit Yes on the RegenerateRequest macro, this posts the new request to
' the log, generates the new file and attaches it to an email

Application.Run "LogUnprotect"
Range(Range("A" & ActiveCell.Row), Range("K" & ActiveCell.Row)).Copy
'Selection.Copy
Sheets("Regenerate Request").Activate
Application.Run "RegenFormUnprotect"
Range("A40:K40").Select
Range("A40").Activate
Sheets("Regenerate Request").Paste

Calculating Time Owed Based On Time Worked
I know the title is a bit vague, but I cant think how else to word it!

I have a sheet (attached) which works out hours worked, and if the amount is under a specified target, it counts how much time is owed. The problem occurs when someone works more hours than the specified target.

I guess I need an IF formula of some kind, to say if the figure is over the target, to put zero in the hours owed column.

Calculate Processing Time With Fixed Time Paramaters
I am wanting to calculate the the processing time for an order that takes place within normal business hours and workweek. A normal day is from 8:00 to 5:00 If a task is started at 2:00 PM Monday and finished at 10:00 AM Tuesday then the result should be 5 hours as I do not want to include any time outside of normal hours. I can figure out how to subtract dates and times but not how to bridge a day(s). My data is somewhat flexible as I have not started the project yet. I can use separate cells for the times and dates or have two cells that use both incorporate the date and time (8/27/09 2:00 PM) for start and end time or any other idea.

Prompt Message Of Time Limit When Time Is Entered
Is it possible to place a prompt message regarding the time limit or return time when entered time is place on the worksheet? Like "Please be back at 8:30 AM" when the user click the Start time button at 8:00 AM.

Extract Time From Custom Date And Time Format
I have a file that has the Date and Time combined into one cell. I want to separate the two, and cannot find anywhere on the net to do so!

This is the cells format:
d/mm/yyyy h:mm

Cells look like this:
28/05/2008 12:30

To Calculate The Difference Between The Start Time And End Time
This may be a bit vague but here goes.

I have to calculate the difference between the start time and end time of a job. The only catch is, how can I avoid calculating "out of hours" time. So, if a job goes from 9am to 9am the next day, I want it to avoid calculating between the hours of 23:30 and 03:30.

Another example is if a job goes from 02:00 to 04:00, I want it to avoid the tim between 02:00 and 03:00.

If there is a difference in days, so the job goes overnight, how do I take that into consideration also.

Adding A Time Offset Based On Time Of Day
I am replicating a Matlab program which calculates tide levels at different times of day. I need to replicate it in excel to speed up data analysis and I am nearly there.

what happens is I need to apply a time offset to the time of high tide at port a based on the time of day, so if it is:

between 00:00 and 06:00 the high tide at port b is 81.6 minutes after the peak at port a
between 06:00 and 12:00 the high tide at port b is 74.56 minutes after the peak at port a
between 12:00 and 18:00 the high tide at port b is 81.75 minutes after the peak at port a
between 06:00 and 12:00 the high tide at port b is 79minutes after the peak at port a

I tried this formula, where CO2 has the time/date of the high tide at port a:
=IF(CO2<0.75,IF(CO2<0.5,IF(CO2<0.25,CL2+(81.6/(24*60)),CL2+(74.56/24*60)),CL2+(81.75/(24*60))),CL2+(79/(24*60)))

The problem is the high tide on 07/01/2005 07:45 is read as 38359.32 rather than 0.32 - is there any easy way to tell excel I'm only interested in the time not the date? I have this spreadsheet setup now to do all the other bits required and i is just the timing that is a problem.

Create A Time Stamp That Shows Elapsed Time
I am trying to create a time stamp that shows elapsed time. So I enter my start time, and if I enter any text in cell B7, return the elapsed time in A7 based off of start time in A6. I have attached an example workbook.

Converting Normal Time To Epoch Time Format
I'm working on converting some databases. One has entries with normal human readable time format, the other uses the unix epoch time format.

Is there a function or vba code that I can use in excel to convert the normal time format to epoch time?

I've got a thousand or so entries, so it would be nice to find a way to do this on a large scale.