How to create a computable drop-down list
For example, you need to select gifts for the employee's children from the lists for different ages and have a spreadsheet with:
- Name and birth date of the child
- The child's age has been calculated by the following formula (see How to calculate age in Excel) for the 1st of August as the current date:
= DATEDIF (<start date>, TODAY (), "y")
where TODAY () returns the current date, "y" tells DATEDIF to count full years between <start date> and TODAY ():
- The next column should contain drop-down lists that show different gift options depending on the calculated age, for example:
To create the dynamic or computable drop-down list, do the following:
1. For every set of options for the dependent drop-down list, create a named range (see Creating and using named ranges), for example:
- First – for children from 1 to 5 years
- Second – for children from 5 to 9 years
- Third – for children under 9 years:
2. Add a drop-down list (see Creating a drop-down list in a cell):
2.1. On the Data tab, in the Data Tools group, click Data Validation:
2.2. In the Data Validation dialog box, on the Settings tab:
- In the Allow drop-down list, select List.
- In the Source box, specify the range, using the nested IF formula:
= IF ($C2<1, 0, IF ($C2<6, first, IF ($C2<10, second, IF ($C2<17, third,))))
or the shorter formula using IFS added in Excel 365:
= IFS ($C2<1, 0, $C2<6, first, $C2<10, $C2<17, third).
- Make sure to check the In-Cell Dropdown option.
Now, Excel will show different lists for different ages:
Note: If you need an automatically extended drop-down list in Excel that automatically adds new items to the list of choices, check the tip How to create an automatically extended or dynamic drop-down list.
See also this tip in French: Comment créer une liste déroulante calculable.