hours in numbers

218 Views 3 Replies Latest reply: May 5, 2012 1:00 AM by Barry
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May 4, 2012 11:10 AM

Hi everyone, I am using numbers for the first time and I would like to now how to create automatically

a column

which starts with a precise hour and then all the following cases contain that hour plus forty minutes.

For example :

 2:00 2:403:204:00

Thanks a lot

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• Level 7 (29,095 points)
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May 4, 2012 11:38 AM (in response to leeloo44)

Hi leeloo,

For times listing in column B, starting at B2:

Start by selecting column B and setting the cell format to:

Date and Time

Date: none

Time: 19:08 OR 7:08 PM

Enter the starting time in B2.

Enter the formula below in B3, then Fill down as far as you need.

=B2+1/(24*3)

Be aware that the value in all of these cells is a Date and Time value, and includes the date current when the first entry was made as part of the value, efvgen though it is not displayed.

Regards,

Barry

• Level 7 (29,095 points)
Currently Being Moderated
May 5, 2012 1:00 AM (in response to leeloo44)

Thanks for the feedback, Leeloo. I was in a bit of a rush whne I posted that, and didn't have time to add the explanation below. I'm adding it now for the benefit of anyone looking for a similar solution, and wondering about the thinking behind this one,

The base unit of Date and Time values is the (24 hour) Day.

Adding 1 to a D&T value returns the D&T value one day later, at the same time of day.

Adding 1/2 to a D&T value returns the Date and time 12 hours (one-half day) later than the start time.

Leeloo wanted the time in 20 minute increments.

20 minutes is 20/60 of an hour, or reduced to lowest terms, 1/3 of an hour.

One hour is 1/24 of a day.

Combining those gives 1/24 * 20/60, or 20/(24*60), or, reduced to the terms shown above, 1/(24*3).

So the amount to be added to the previous value to give a Date and Time value 20 minutes later is 1/(24*3).

Regards,

Barry

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