How to Convert MM to Inches in Excel: A Step-by-Step Guide


Michael Collins

Converting MM to inches in Excel is a breeze once you know the formula. You simply divide the MM value by 25.4, and voila! You have your conversion. It’s a simple process that takes mere seconds to complete.

Step by Step Tutorial on How to Convert MM to Inches in Excel

Before you start converting those pesky millimeters into inches, it’s important to understand that Excel is a powerful tool that uses formulas to make calculations easy. With just a few clicks, you can convert an entire column of MM values into inches.

Step 1: Enter the MM value into a cell

Start by typing the MM value you want to convert into any cell on your Excel worksheet.

When you enter the MM value, make sure you don’t include any units like ‘mm’ or ‘millimeters.’ Just the number will do the trick!

Step 2: Type the conversion formula into an adjacent cell

In the cell next to your MM value, type the formula "=A1/25.4" (without the quotes).

The formula "=A1/25.4" tells Excel to take the number in cell A1 and divide it by 25.4 to convert it to inches. You’re using the cell reference ‘A1’ here, but you can adjust it to match the cell where your MM value is.

Step 3: Press Enter to get the converted value

After typing the formula, simply hit the Enter key on your keyboard to see the converted inch value.

Once you press Enter, the cell will display the value in inches. If you need more decimal places, you can increase the number by formatting the cell.

After you’ve completed these steps, you’ll have successfully converted MM to inches in Excel. The new inch value will be displayed in the cell where you entered the formula.

Tips for Converting MM to Inches in Excel

  • Always remember that 1 inch equals 25.4 millimeters. This is the conversion factor you’ll use in your formula.
  • If you need to convert a whole column of MM values, simply drag the formula down the column using the fill handle (the small square at the bottom right corner of the cell).
  • Make sure your MM values are in a single column without any other data to avoid confusion.
  • If your MM value already contains the unit (e.g., ‘mm’), remove it before applying the conversion formula.
  • To show fewer decimal places, you can use Excel’s "Round" function in the formula like this: "=ROUND(A1/25.4, 2)" to round the result to two decimal places.

Frequently Asked Questions

Can I use this method to convert inches to MM in Excel?

Yes, simply multiply the inch value by 25.4 instead of dividing.

To convert inches to MM, use the formula "=A1*25.4" where A1 is the cell containing the inch value. This will give you the equivalent value in millimeters.

What if my MM values are in different cells, not in a column?

You can still use the same formula, just adjust the cell references accordingly.

For example, if your MM value is in cell B3, use "=B3/25.4" for the conversion. Repeat this for each cell with an MM value.

How do I convert multiple MM values at once?

If you have a list of MM values, enter the formula once and then drag it down to fill the other cells.

After entering the formula next to your first MM value, click on the fill handle and drag it down to fill the adjacent cells. Excel will apply the conversion formula to each cell.

Is there a way to set up Excel to automatically convert MM to inches?

You can’t set Excel to automatically convert units, but you can save your conversion formula for future use.

Save the Excel file with your conversion formula, or write down the formula so you can quickly enter it whenever you need to convert MM to inches.

Can I convert inches to feet in Excel as well?

Yes, divide the inch value by 12 to get the value in feet.

To convert inches to feet, use the formula "=A1/12" in a similar fashion to the MM to inches conversion.


  1. Enter the MM value into a cell
  2. Type the conversion formula into an adjacent cell
  3. Press Enter to get the converted value


Excel is not just a spreadsheet program; it’s a powerful tool that can make life easier when you’re dealing with measurements. Converting MM to inches is just one of the many tasks Excel can handle with ease. Whether you’re in the middle of a DIY project, working on a school assignment, or simply need to convert measurements for any other reason, Excel has got you covered. Remember to use the correct formula, and if you ever get stuck, don’t hesitate to refer back to this article for guidance. Keep practicing and soon enough, converting MM to inches in Excel will be second nature to you. Happy converting!