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Asked: 2026-05-28T13:05:24+00:00

I have some dates in column A of an Excel Spreadsheet and I have

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I have some dates in column A of an Excel Spreadsheet and I have some Events in column B.

DATE            EVENT
1/23/2012 5:22  a
1/23/2012 5:22  b
1/23/2012 5:22  c
1/24/2012 8:48  d
1/24/2012 9:22  e
1/24/2012 9:25  f

I would like column C to be the difference in time (in minutes) since the last event. I tried a =SUM(A3-A2), for example, but it returns a decimal that I can’t make sense of (0.023912037, 0.001875, 0.016747685, etc).

I’m not proficient in excel at all so even a point in the right direction would be awesome.

Thanks.

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1 Answer

  1. Editorial Team

    You’re doing it correctly.

    Excel stores and calculates time as a decimal portion of a day. 24 hours = 1. 12 hours equal 0.5

    Format your cell as time (select, right click, format cells, choose one of the time formats) or wrap your formula in =TEXT(A1,"hh:mm:ss").

    Also there’s no need to use =SUM(), Your final formula should just be =A3-A2 or if you need the text formatting =TEXT(A3-A2,"hh:mm:ss")

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