Microsoft Project uses the duration field to calculate the difference between the start and finish dates of a task. But what if you want to view the sum of all durations for a set of tasks?
Microsoft Project does not have a field to calculate the total durations for a set of tasks. However this can be easily accomplished by creating a custom field.
Create a Custom Field to Sum Task Duration
- Click the Format tab under Gantt Chart Tools on the Ribbon.
- Click the Custom Fields button in the Columns group.
- Click the list arrow in the top right corner and select Duration as the type of field we want to create.
- With Duration1 selected in the list of duration fields, click the Rename button below the list. Enter Duration Total as the name for the new field.
- Click the Formula button
- Click the Field button and select Duration and then Duration again from the submenu.
- Click Ok.
- A message appears warning you that because the field will be calculated by a formula, any existing data will be lost. Click Ok.
- Select the Rollup option. Click the list arrow and change the function to Sum.
- Click Ok to save and close the dialog box.
The field has been created. Now it needs to be inserted into the table.
Insert the Duration Total Column
- Right mouse click on the column header to the right of where you want to insert the new Duration Total column.
- Select Insert Column from the menu. Type “du” to scroll through the list quickly and select the Duration Total field.
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