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General => Off Topic => Topic started by: DLX on August 31, 2015, 11:07:10 AM

Title: Sorry very basic libreoffice time calculations hours
Post by: DLX on August 31, 2015, 11:07:10 AM

I have looked at videos, bit don't get right out come  :-[ My maths just as great and my English.
using libreoffice spreadsheet

what would like is to add up hours from on time to end time (should be easy)

I put start time in column B Cell 2 = B2 and end time in column C Cell 2

10:00 B2 15:00 C2 in column D Cell 2 =C2-B2 then hit enter done show me hours from start to end.
once I get the hours I would like a total then up to.

I also clicked in cell format cell to numbers and get error Err:552Thanks
Sorry did say very basic.

(https://db.tt/HwtzhUnB)

- 15:15 why -
I know i'm doing this the slow way =Cx - Bx how would add left column B to C column please.
instead of

=C2-B2
=C3-B3
=C3-B4
=C5-B5
so on


thanks  :-[




Thanks

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: DLX on August 31, 2015, 12:05:40 PM

Kind got it working but not over night

21:00 - 07:30

Quote

 

21.00

04:30

-20.81

wrong  :-\
 

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: Wirezfree on August 31, 2015, 01:20:00 PM

Hi,

The issue is the "past midnight" calc.
I dug out an old Excel sheet, and knocked this up, it still works in Libre Calc.

(http://i.imgur.com/La8kRik.png)

The field that does the difference needs to do a check,
I think I got this of the web/colleague..??

In the sum/difference cell you need to have:

Example:
Cell E2 contains =D2-C2+(C2>D2)

I can send you this if you PM me an emaill addy.

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: justme2 on August 31, 2015, 02:44:37 PM

I've just played with Libre  Calc and it seems all you need to do is set the cell format to time as hh:mm then subtract start time from end and sum the total time cells. Calc appears to take care of passing midnight events.

See http://superuser.com/questions/387106/libreoffice-calc-how-to-get-total-for-hhmmss-cells for the format for the total hours cell

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: DLX on August 31, 2015, 03:26:02 PM

I will read tomorrow with program open
Thanks for time n effort both 

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: Wirezfree on September 03, 2015, 06:58:45 AM

@ Dyslexic...

Have pm'd & emailed you...
Best I can do/offer...
Hopefully you can see how it works.

Dave

Title: Re: Sorry very basic libreoffice time calculations hours
Post by: DLX on September 03, 2015, 07:07:09 AM

Many thank.
I make copy before taking it apart.