Excel Basics: How to add drop down list to validate data

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Excel Dropdown lists - demo

Validating your data as you type can prevent any surprises when you are doing analysis / follow-up on the data. Thankfully, excel has the right tools to do it. Excel drop down list can assist you in picking up a value from a valid list to enter in a cell. Here is a short how-to guide to get you started on data validation in excel.

Howto set up Drop Down list in Excel?

  1. First, set up a list of valid values in range of cells. Say your valid list of entries is in A1:A6.
  2. Now go the cell where you want to validation drop down to appear.
  3. Go to Data ribbon and click on Validation
  4. Set up “List” as allowed values and enter =A1:A6 as Source (see below picture)
  5. Done. Now you can see the drop-down in your cell.
Excel Data Validation - Drop-down settings
Data Validation Settings

Video – How to create Drop Down List in Excel & Best Practice Tips

I made a video with a real world example of drop down lists. Please watch it below to understand the set up process & how to customize the validation rules.

Sample workbook to Practice Data Validation Drop Downs

Click here to download the sample workbook to practice data validation drop down lists.

How-to ignore duplicates while setting up validation list?

If you want to use a source list that has duplicates and want to ignore them when setting up validation drop-down, then you have two options. Something like this:

drop-down in Excel without duplicates
Data Validation drop-down without duplicates
  1. Use Excel Dynamic Arrays (works in Excel 365)
  2. Use Pivot Tables (works in all versions of Excel)

Let’s say your list of inputs is in customers[Education] column.

Using Dynamic Arrays

Note: This works only in Excel 365 with dynamic array feature. Not all 365 users will have access to DA now, but everyone of them will get Dynamic Arrays soon.

Just go to an empty cell (preferably in a separate worksheet like settings tab) and type =SORT(UNIQUE(customers[Education]))

Excel will spill your data down to next few cells depending on how many unique values are in your data.

Let’s say your formula is in cell A1

Now, go to Formulas > Define Name and create a name for validation options as,

Dynamic array approach to get drop-down list without duplicates
Use # to tell Excel you want the entire spill range for the name

Finally, use myOptions as list source for data validation.

Using Pivot Tables for drop down without duplicates

This is most compatible option as it works in all versions of Excel.

  1. In a new sheet or blank range, insert a pivot table from your data.
  2. Add the Education field to row labels area
  3. Remove any grand, sub-totals
  4. Let’s say the first item in the pivot is in cell A2.
Pivot table method for creating data validation dropdown without duplicates
Pivot table with list of education values

Now, create a name with myOptions and use the formula

=OFFSET($A$2,0,0, COUNTA($A$2:$A$21), 1)

this will make a dynamic named range with how many ever education options are there in that pivot table.

Note: Change $A$21 to a cell address further down if you will have more options.

Finally, use myOptions as the list source for data validation.

Your drop-down list without duplicates will be ready.

Drop-down list without duplicates – Video

I made a video explaining how to make dropdowns without duplicate values. You can see a cameo from Nishanth (my son) in the video. Check it out if you want to understand how Dynamic Array method and Pivot Table method can be setup. Watch it below or visit my YouTube Channel.

Best Practice for Drop-downs

Drop-downs are very useful for data analysis, charting and reporting work. They are user friendly and easy to set up. That said, keep these ideas in mind when implementing them.

  • Use named ranges: Instead of hard-coding cell addresses, use named ranges for setting up validation lists. This will also enable you to connect data validation list to table columns thru structural references.
  • Source lists in a separate tab: Whenever possible, set up all your source lists in a separate tab. I call mine “Settings”. This will make any changes easy for you.
  • Don’t have too many options: If your drop-down is having more than 50 options, consider two-level cascading drop-downs or some other way to gather inputs.
  • Try Form controls or Slicers too: Drop-downs are great, but they are just one of the many ways to add interactive abilities to your workbooks. Consider form controls and Slicers too.

Download Practice Workbook

I made a workbook with simple and “avoiding duplicates” examples. Please download it here and practice to learn more about these techniques.

More Data Validation Tricks

Here is a collection of useful tricks and ideas with Data Validation. Check them out to learn more.

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35 Responses to “Quick and easy Gantt chart using Excel [templates]”

  1. "Please share your experiences and ideas using comments"

    For those willing to go VBA, XL can do far more w/Gantt Charts. Compare to PapaGantt. https://sites.google.com/site/beyondexcel/project-updates/papagantt-thebigdaddyofxlganttcharts

    While making PapaGantt was neither quick nor easy, using PapaGantt is both, not just for displaying Gantts, but for scheduling tasks as well.

  2. Stef@n says:

    is it possible to get a xls(m) file ?
    instead of a zip-file with .xml-files ?
    i cannot open it with excel :/
    Regards
    Stef@n

  3. Darren "AusSteelMan" says:

    Thanks very much for this workbook idea.

    To slightly up-scale functionality I added:
    1. conditional format for when the cell value =2 to be red which could be used for critical path or other activity highlighting needs (milestones perhaps)
    2. conditional format for when the cell value =c to be green which could be used for showing activity progress
    3. conditional format for the same range where formula =DATE(YEAR(D$5),MONTH(D$5),DAY(D$5))=TODAY() and set custom to ;;; and cell fill colour to a light blue. This will highlight today down the whole table to allow quick assessment of activity progress to plan. Anything not green upto where the date indicator is shows activity is behind the plan. Opposite for tasks ahead of the plan.
    (There is probably a better way to get the same result but this works for now. If there is please post for us to share.)

    Hope this made enough sense.

    Also, thanks Craig for the link. I'll have a better look soon.

    Regards,
    Darren

  4. Hey Chandoo,

    I actually made one of these for a friend of mine but added an extra level of automation.

    Rather than putting in 1 on all the dates the activity occurs, I added a column for start and end date of each project. Then I used formula along the lines of :

    =IF(AND(DateAtTop >= Start Date, DateAtTop <= End Date),1,"")

    Then used the same conditional formatting where 1 was coloured.

    I thought this was a nice touch, especially if a project lasts for many days.

    Let me know what you think 😉

    Lucas

    P.S. First time I've posted here, love your work btw!

  5. […] via Quick and easy Gantt chart using Excel [templates]. […]

  6. Prahlad Gorur says:

    Excellent, thanks for this tip and expample.
    I had a monthly reporting template very similar to this, but was done in excel which needed more manual inputs.
    I used your exmaple and updated my monthly group reporting plan.
    I further devided the day into 4 quarters to make it easy for us to followup on different tasks.
    Now, I just have to update the start date, and everything gets udpated by itself in fraction of a second.
    Thanks once again. love your daily udpates.

  7. Prajay Kumar says:

    Hi Chandoo,

    Can you guide on preparing an indian version of the captioned sheet. We have saturdays working :-(, and only one day weekly off on sunday.

    Regards-Prajay

  8. Hi Chandoo,very useful post.i need gantt chart for inventory module.

  9. […] Quick and easy Gantt chart using Excel […]

  10. Maria says:

    Hi.

    Really usefull post. I would like to know if i can also include weekends.

    Thank you

  11. Shafeeq says:

    Hi Chandoo, thank you for the great job, I was wondering if you can customize this sheet for Inventory planning purposes?!

    thank you indeed

  12. Leyum says:

    This was so helpful. ive been through about 10 different tutorial type things and this has to be the best so far, helped me out a great deal. and now my boss is happy i can make gantt charts!

    thanks

  13. David says:

    This's a great post, thanks for sharing

  14. Steven says:

    Hi Chandoo,

    Thanks for the excel tutorial. I wanted to make a simple modification, however it will cause issues with the duration part. I created another rule/cell marked 2. For my project I want to show a projected timeline and then an actual timeline. The issue is that the duration is being logged for when I enter 2, which I want to be projected and not actual. Will you please assist in letting me know how I can create a duration for both project and actual on the same line?

    Thank you,
    Steven

  15. Joe says:

    Showing vertical line between every week is very useful for me, I used to do it manually. Thanks so much!!

    But how about, my gantt chart included Saturday & Sunday, and I want to show the vertical line after Sunday, could any expert teach me how to fix it. Thanks again.

  16. Helen N says:

    This was so helpful - thank you! I had a bit of trouble with the end of the week conditional formatting over-writing the filled cells but switching the order of the rules sorted it out. Needed to put together a gantt chart quickly for an important bid at short notice and this was just the job - thanks for taking the time to post it. Much appreciated.

  17. Alina says:

    This is the first time I'm reading a tutorial that actually makes sense 🙂 This is absolutely great, with only one minor issue I can't seem to figure out on my own. How do I include weekends in (or instead of) the Workday formula? Thank you!

  18. […] This template I made myself but I inspired from Chandoo.org. […]

  19. Harrison says:

    Hi,

    Sometimes I must work at weekends - it is possible to modify the dates so that you can include Sat + Sun as well?

    Thanks,
    H

  20. Stuart says:

    Nice gantt chart template chandoo, simple but useful

  21. Kirstin says:

    Thank you so much for this excellent guide! I have adapted this to show scheduled activities at multiple project sites weekly over the course of the year, including active and proposed work. With just a tiny bit of tweaking to your tutorial, I was able to create a chart that suited my needs perfectly!

  22. Somnath says:

    Thank you very much for idea sharing .very innovative workday formula is showing 5 days but i want 6 days , is there any other option plz reply..

  23. Somnath says:

    i got it friends..

    =WORKDAY.INTL(F4,1,11)

    hhhhhh

  24. Cynthia says:

    Hi thanks a lot for the tuto!! It helped me a lot!!
    But can you tell me how can I add a vertical line representing today on it?

    • Hui... says:

      @Cynthia

      Open the template
      Select D7:DS26
      Goto Conditional formatting
      New Rule
      Use a Formula
      =D$5=today()
      then set the format as a Red Right Hand Border only
      Apply
      Do not select stop here for the rule

  25. Muriel says:

    Hi Chandoo,

    I purchased your Project Management templates a month ago and have not had the chance to thank you for the great templates. Thank you!!!!! It has saved me a lot of time creating and re creating templates. Unfortunately, I had to do a lot of customization but it's not that bad. I am now in the process of customizing my GANTT which my boss thinks is too granular. He doesn't want to see a weekly grant. Only the months should be showing. I have researched and researched but to no avail. Do you have any examples I can look at?

  26. Nadine says:

    Hi Chandoo,
    thanks so much for all your tips on Gantt Table.
    I'm actually building one at the moment and want to use the conditional formatting. However, I always get into trouble with that when I have to add new lines. I don't know the final size of my table yet and I eventually also want other people to be able to work with it.
    Conditional formatting tends to "split up" into various "applies to" ranges when you insert a new row or copy and past values from somewhere.
    I'm sure you've come across this issue already... So far I couldn't find a feasible solution to this. I was wondering if you had an idea / suggestion for me?

    Thanks so much!!!
    Nadine

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