calculating time in a 24hour period midnight to midnight

[LearningEX]

i have a day that starts at 00:00 and finishes at 00:00, i need to abstract the time before starting work and time after work. so if i start work at 6am and finish work at 21:00 (9pm). so in reality that would be 6 hours after midnight and 3 hours before midnight giving a total of 9 hours rest. to add a twist to this is another issue if the time of rest is less than 11 hours i need a 9 to be displayed and if greater than 11.25 (11 hours 15 min) i need an 11 to be shown.

 

[etaf]

how about something like
=IF((B2+(1-C2))<TIME(11,0,0),TIME(9,0,0),IF((B2+(1-C2))>TIME(11,15,0),TIME(11,0,0),(B2+(1-C2))))

what version of excel do you have ? worth updating profile as solutions may vary by excel version

Book3
	A	B	C	D
1		Start	End
2		6:00	21:00	9:00
3		3:00	23:00	9:00
4		6:00	18:00	11:00
5		6:00	18:50	11:10
Sheet1

Cell Formulas
Range	Formula
D2:D5	D2	=IF((B2+(1-C2))<TIME(11,0,0),TIME(9,0,0),IF((B2+(1-C2))>TIME(11,15,0),TIME(11,0,0),(B2+(1-C2))))

May need to add < = or a > = wasn't sure, if its exactly 11:15 - if thats still 11 or 11:15

A SMALL sample spreadsheet, around 10-20 rows, would help a lot here, with all sensitive data removed, and expected results mocked up and manually entered, with a few notes of explanation.

MrExcel has a tool called “XL2BB” that lets you post samples of your data and will allow us to copy/paste your sample data into our Excel spreadsheets, saving a lot of time.

XL2BB - Excel Range to BBCode

Excel 'mini-sheet' in messages - XL2BB Although experts prefer to read your description and question instead of working in your actual file to solve your problem, there are times that it is difficult to explain an issue without providing actual...

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You can also test to see if it works ok, in the "Test Here" forum.

Test Here

Use this forum to test your signature, learn bbcode, smilies, XL2BB, etc. Threads in this forum are automatically deleted after no replies for seven (7) days

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OR if you cannot get XL2BB to work, or have restrictions on your PC , then put the sample spreadsheet onto a share
I only tend to goto OneDrive, Dropbox or google docs , as I'm never certain of other random share sites and possible virus.

 

[LearningEX]

ill give it a try but may need to swap a few things around

 

[etaf]

ok,
Also posting a small image
Note: Images are difficult to see , and also requires that I input all the data myself, which is very time consuming.

i have also answered you other similar question

help with formula to display 13 or 15

good morning all, this probably going to be really simple for someone, ive made a mistake in my formula and cant get it to display either a 13 or 15, if my working time is less than 13 hours worked then i need a 13 to be displayed, if greater than 13.25 (13 hours 15 min) then i need 15 to be...

www.mrexcel.com

which seems the same sort of question

 

[LearningEX]

ok,
Also posting a small image
Note: Images are difficult to see , and also requires that I input all the data myself, which is very time consuming.

i have also answered you other similar question

help with formula to display 13 or 15

good morning all, this probably going to be really simple for someone, ive made a mistake in my formula and cant get it to display either a 13 or 15, if my working time is less than 13 hours worked then i need a 13 to be displayed, if greater than 13.25 (13 hours 15 min) then i need 15 to be...

www.mrexcel.com

which seems the same sort of question

lol i was not asking for you to put data in yourself, i was just showing you what i was doing thats all

 

[etaf]

i was just showing you what i was doing thats all

OK

ill give it a try but may need to swap a few things around

And is it working now ?

 

[gordsky]

Assuming your end time is in column C and your start is in column B another option is

=IF(((C2-B2)*24)>=15,"9","11")