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

Converting millimeters to inches in Excel can be a breeze once you get the hang of it. Whether you’re working on a school project, crunching numbers for work, or just trying to make sense of measurements, Excel has got you covered. All it takes is a simple formula and a few clicks, and you’ll be converting those pesky millimeters to inches in no time. Ready to learn how? Let’s dive in!

Step by Step Tutorial: Converting Millimeters to Inches in Excel

Before we get started, let’s understand what we’re aiming for. We want to convert millimeters to inches because the two units of measurement are often used interchangeably. By following these steps, you’ll learn how to quickly and accurately make this conversion using Excel.

Step 1: Enter the millimeter value

Type the value in millimeters that you want to convert into inches into a cell in Excel.

This is your starting point. The value you enter here is the amount in millimeters that you want to convert to inches.

Step 2: Use the conversion formula

In an adjacent cell, type the formula =A1/25.4 to convert the value from millimeters to inches.

The number 25.4 is the key here because there are 25.4 millimeters in one inch. By dividing the millimeter value by 25.4, Excel will give you the equivalent value in inches.

Step 3: Press Enter to get the result

After typing the formula, press Enter, and the cell will display the converted value in inches.

Once you press Enter, the magic happens. The cell will automatically calculate the conversion and display the result in inches.

After completing these actions, the cell you selected for the conversion will now display the value in inches. You can apply this formula to multiple cells if you have a list of measurements in millimeters that you need to convert.

Tips for Converting Millimeters to Inches in Excel

  • Ensure that you’re entering the formula in the correct cell to avoid any errors.
  • Remember that the conversion factor of 25.4 is critical for accurate conversions.
  • Use the fill handle to apply the same formula to multiple cells quickly.
  • Double-check your results to ensure accuracy, especially if you’re working with precise measurements.
  • You can format the cell to show fewer decimal places if you prefer rounded numbers.

Frequently Asked Questions

What if I have a list of values to convert?

You can apply the same formula to multiple cells by dragging the fill handle down the column.

Can I convert inches back to millimeters?

Absolutely! Just use the formula =A1*25.4 in an adjacent cell to convert inches back to millimeters.

How do I format the cell to show fewer decimal places?

Right-click the cell, select ‘Format Cells,’ then choose the ‘Number’ tab and reduce the decimal places.

Is there a way to convert millimeters to inches without using a formula?

While a formula is the most straightforward method, you can also use Excel’s ‘Convert’ function found under the ‘Formulas’ tab.

Can this conversion be done on Excel for mobile?

Yes, the same steps and formula apply to Excel on mobile devices.


  1. Enter the millimeter value in a cell.
  2. Use the formula =A1/25.4 to convert to inches.
  3. Press Enter to get the result.


Converting millimeters to inches in Excel is a simple process that can save you time and ensure precision in your work. By mastering this skill, you can seamlessly switch between metric and imperial systems without breaking a sweat. The key is to remember the conversion factor and to use the formula correctly. With a little practice, you’ll be converting measurements like a pro.

If you’re looking to expand your Excel skills further, there are plenty of resources available online and in print that can help you become an Excel wizard. From YouTube tutorials to comprehensive guides, the tools are at your fingertips. And of course, the more you practice, the more proficient you’ll become.

Remember, Excel is more than just a spreadsheet program—it’s a powerful tool that can handle a wide array of tasks, including unit conversions. So, the next time you’re faced with a conversion challenge, just open up Excel and let it do the heavy lifting for you. Happy converting!

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