How to Calculate 90 Days from Date in Excel: A Step-by-Step Guide

Calculating 90 days from a given date in Excel is surprisingly simple. All you need is a basic understanding of Excel functions like DATE and cell referencing. This guide will walk you through each step, making it easy to add 90 days to any date.

How to Calculate 90 Days from Date in Excel

In this section, you will learn how to calculate 90 days from a specific date in Excel. We’ll use a combination of simple Excel formulas and cell manipulation to achieve this.

Step 1: Open Excel

First, open your Excel application.

Excel is the tool you’ll be using to perform this task. Ensure it is up and running on your computer.

Step 2: Enter the Date

Second, in any cell, enter the date from which you want to calculate 90 days.

For example, if you want to start from January 1, 2023, simply type "1/1/2023" in cell A1.

Step 3: Select Another Cell

Third, click on another cell where you want the result to appear.

This could be any empty cell. Let’s say you choose cell B1 for the result.

Step 4: Use the Formula

Fourth, in the selected cell, type the formula =A1+90.

This formula adds 90 days to the date in cell A1. Press Enter to get the result.

Step 5: Check the Result

Fifth, verify that the new date showing in your selected cell is 90 days after the original date.

You should see the date "4/1/2023" in cell B1 if you started from "1/1/2023". This confirms that your calculation is correct.

Once you complete these steps, the new date, which is 90 days from the original date, will be displayed in the cell you selected in Step 3.

Tips for Calculating 90 Days from Date in Excel

1. Format your cells: Ensure your date cells are formatted correctly. Use the "Short Date" or "Long Date" format for proper display.
2. Autofill: If you need to apply the same calculation to multiple dates, use the autofill feature to drag the formula down.
3. Date Function: Use =DATE(YEAR(A1), MONTH(A1), DAY(A1)+90) if you prefer a more explicit formula.
4. Error Checking: Double-check for typos or incorrect cell references to avoid errors.
5. Documentation: Add a comment to the cell with the formula to explain what it does for future reference.

Frequently Asked Questions

Can I add more than 90 days using the same method?

Yes, you can add any number of days by changing the number in the formula. For example, =A1+120 adds 120 days.

What if my date is in a different format?

Ensure your cell is formatted as a date. Right-click the cell, select "Format Cells," and choose the "Date" category.

Can I use this method to subtract days?

Absolutely. Use a negative number in the formula, like =A1-90, to subtract 90 days.

Can I automate this for multiple rows?

Yes, use the autofill feature. Click and drag the small square at the bottom-right corner of the cell with the formula to apply it to other rows.

What if my original date is in a text format?

Convert it to a date format first. Use the DATEVALUE function if needed.

Summary

1. Open Excel.
2. Enter the date in a cell.
3. Select another cell.
4. Type =A1+90.
5. Check the result.

Conclusion

Calculating 90 days from a date in Excel is a breeze once you know how to leverage its basic functions. Whether you’re managing deadlines, planning events, or tracking goals, this simple method can save you a lot of time and effort. With these steps and tips, you can confidently handle date calculations and even customize them further to suit your needs.

If you’re eager to learn more, consider exploring other date functions like EDATE or NETWORKDAYS to manipulate dates based on specific criteria. Excel is a powerful tool with endless possibilities, and mastering these basics is just the start. Dive in, experiment, and watch your productivity soar!