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How to group data by half an hour or 15 minutes in Excel PivotTable?

In Excel PivotTable, you can group data by one hour, but in some cases, you just want to group data by half an hour or 15 minutes, how can you handle it? Here I introduce some formulas to help you.
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Group data by half an hour or 15 minutes in PivotTable

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Group data by half an hour or 15 minutes in PivotTable

Take group data by half an hour as example.

1. Select the adjacent cell to the data, type this formula =MOD(INT(C2/(1/48))*(1/48),1), C2 is the time data, the drag fill handle down to the cells which need this formula.

Note: Please format the formula cells as Time formatting.
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2. Select the data including the helper formula column, click Insert > PivotTable, in the Create PivotTable dialog, select one destination to place the PivotTable.

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3. Click OK, the PivotTable Fields pane is displayed, add the formula column and other columns into Rows section as you need, and add the column you want to calculate into Values section.
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Now the data has been grouped into half an hour.
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1. To group by 15 minutes, use this formula =FLOOR(C2,TIME(0,15,0)) in the helper column.

2. You can change the calculation in Value Field Settings dialog.
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