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How To Subtract Dates in Excel


How would you count someone’s age? Simple, by calculating the difference between two dates. There are certain situations where you need to get the number of years, number of months, number of days. There are different ways to get it but the best way to calculate difference between two dates in excel is to use the Dated If function. But the funny thing is that this is a hidden function in excel. You won’t be able to locate this function in the Formula Menu. Even if you write the function excel won’t show the parameter suggestions like it does for other functions. So, you need to understand and use the function on your own. Well, not exactly. I’ll be guiding you. So, let's have a look at the Function.

This is how the Dated If Formula looks:

= DatedIF(Start Date, End Date, "Unit")

We have the Starting Date as the first argument. Here you can write the date or choose a date reference. This date can be written in text or formatted as a date.

The End Date is the second parameter. Here you can write the date or choose a date reference. This date can be written in text or formatted as a date. This date, however, cannot be earlier than the start date.

The unit is the third parameter. There are six Units in the Dated If function, however one of them is broken. This is why this feature is disabled. The following are the units and their explanations:

"Y" = Years are calculated by subtracting dates in Excel. If the start date is 2/26/1995 and the end date is 10/29/2023, the "Y" unit will show 28. Between the start and finish dates, there are 28 years.

In Excel, type "M" to get months by subtracting dates. For instance, if the beginning date is 2/26/1995 and the ending date is 10/29/2023, the "M" unit will show 344. Between the start and finish dates, there are 344 months.

"D" stands for "days" when subtracting dates. For instance, if the beginning date is 2/26/1995 and the ending date is 10/29/2023, the "D" unit will show 10,473. Between the start and finish dates, there are 10,473 days.

"MD" denotes a unit that isn't working properly. It was designed to calculate the difference between the start and finish dates without taking into account the months and years. However, it does not function properly. Consider the following scenario: The "MD" unit should display 3 if the start date is 2/26/1995 and the end date is 10/29/2023. It should only calculate the difference in days, not months or years. The difference is 3 because the starting date was 21 and the ending date was 24.

"YM" = This will calculate the difference between the month of the start date and the month of the end date, ignoring days and years. If the start date is 2/26/1995 and the end date is 10/29/2023, the "YM" unit will show 8. It will only calculate the difference in months, not days or years. The month of the starting date was 1 and the month of the finishing date was 9, so the difference is 8. 

"YD" = This will calculate the difference between the days of the start date and the days of the end date, ignoring months and years. For instance, if the start date is 2/26/1995 and the end date is 10/29/2023, the "YD" unit will show 246. Because there are 246 days between the 21st of January and the 24th of September. I hope you understand what I'm trying to say.

If you're using the DatedIf Function to determine the difference between dates in Excel, there are a few things to keep in mind.

1. Your starting date must be less than or equal to the ending date, or the formula will return a NUM error.

2. Your date format (both the beginning and ending dates) must match the date format of your computer. If you don't, you'll get a Value Error.

3. If you enter the date as text in the formula, it must be enclosed in double quotation marks.

To understand more about the known concerns with the DatedIF function, see this Microsoft article .

This is how I subtract two dates in Excel to discover the difference between two dates. Thank you so much for taking the time to read this far. Please consider supporting us on Patreon if you are able

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