Have you ever needed to calculate the difference between two dates in Google Sheets but weren’t sure how? If so, you’re in the right place! In this blog post, we’ll dive into the DATEDIF Function in Google Sheets, a powerful tool that can help you easily calculate the difference between dates in days, months, or even years. We’ll walk you through a real-world example, so you can see exactly how it works.
Why Use the DATEDIF Function ?
Before we jump into the example, let’s quickly discuss why you might want to use the DATEDIF function. Whether you’re managing a project timeline, tracking employee tenure, or just curious about the number of days between two dates, this function can save you a lot of time. Unlike other date functions in Google Sheets, DATEDIF is specifically designed to calculate the difference between dates in various units—days, months, or years.
Our Example Data
To help you grasp how the DATEDIF function works, we’ll use a simple dataset. Imagine you’re managing multiple projects, and you have the start and end dates for each project. You want to calculate how many days and months each project took to complete. Here’s what our data looks like:
How to Use the DATEDIF Function
Now, let’s see how we can use the DATEDIF function to calculate the number of days and months between the start and end dates in our dataset.
Step 1: Calculating the Number of Days
To calculate the number of days between the start date and the end date, we’ll use the following formula:
=DATEDIF(A3, B3, "d")
Here’s what this formula does:
- A3: This is the start date.
- B3: This is the end date.
- “d”: This argument tells the function to return the difference in days.

When you apply this formula to our dataset, you’ll get the number of days each project took from start to finish.
Step 2: Calculating the Number of Months
Next, we can calculate the number of months between the start date and the end date using this formula:
=DATEDIF(A3, B3, "m")
Similar to the previous formula:
- “m”: This argument instructs the function to return the difference in months.
The Result
After applying these formulas to our dataset, here’s what we get:
Wrapping Up
And there you have it! The DATEDIF is a simple yet powerful tool in Google Sheets that can help you calculate the difference between dates in days, months, or years. Whether you’re managing a project timeline or tracking important dates, this function can save you a lot of time and effort. Now that you know how to use the DATEDIF function, why not give it a try on your own data?
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