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How to group time by minutes or hours intervals in Excel?

Here is a list of time, and what I want to do is to group time by 3 hours as below screenshot shown, how can I quickly solve it in Excel?
doc group time by interval 1

Group time by hours intervals

Group time by minutes intervals

Group time by hours intervals

To group time by hours interval, you just need one formula.

Select a cell next to the time, and type this formula =FLOOR(A2,"3:00"), A2 is the time you use, 3:00 is the hours interval, press Enter key and drag fill handle down to apply this formula to cells.
doc group time by interval 2

Group time by minutes intervals

If you want to group time by minutes intervals, also can use formulas.

Select a cell next to the time, and type this formula =FLOOR(A2,TIME(0,15,0)), A2 is the time you use, 15 is the minutes interval, press Enter key and drag fill handle down to apply this formula to cells.
doc group time by interval 3

Tip: if the formula results are displayed as digits, just need to format them as time format.

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Khunsha Nasr
Khunsha Nasr
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Good Morning,

I want the time interval for 30 seconds. i used floor command, like this FLOOR(A2,TIME(0,0,30)), where A2 is my cell for the time. But, its giving me right result. Can you help me with this
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Nicolas C Petraglia
Nicolas C Petraglia
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I have the duration of the data (not time stamp) in each cell. I want to be able to be able to group into less than 5 minute, 5-10 minutes, 10-15 minutes, 15+. How would I do that. Note: the time durations are displayed HH:MM:SS

Thanks
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Sunny
Sunny     Nicolas C Petraglia
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Hi, Nicolas C Petraglia, try formula =FLOOR(A2,TIME(0,5,0)), and drag auto fill handle down to all cells you want to group. See the screenshot shown:
https://www.extendoffice.com/images/stories/comments/sun-comment/doc_formula_to_group_time.png
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Guest
Guest
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Hi, I need to figure out how to align a column of data with one-hour timestamps to a column of data with 5-minute timestamps.  I don't want to average the 5-minute data at all, nor do I want to round the timestamp using FLOOR, I just want to distribute the one-hour data points down the column beside the 5-minute data so they line up.
i.e. the one-hour data column must have 11 blank rows so that it aligns with the same ":00" timestamp in the 5-minute row.  How can I do this?  
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Sunny
Sunny     Guest
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Hi, Guest, I do not understand your problem. My understanding is that insert blank 11 rows to make one-hour timestamps align with 5-minutes timestamps. If so, copy and past the 5-minutes timestamps to the other sheet firstly, then select the one-hour timestamps selection and apply Kutools for Excel's Insert Blank Rows feature and set insert 11 rows per row, and then copy and paste the 5-minutes timestamps back. For more detail for Insert Blank Rows, please visit:https://www.extendoffice.com/product/kutools-for-excel/excel-insert-blank-rows-column.html
For other methods on inserting blank row, please visit:https://www.extendoffice.com/documents/excel/797-excel-insert-blank-row.html
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