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How to Convert MM to CM in Excel – Step by Step Guide

John Michaloudis
When working with measurements in Excel, I often need to convert millimeters (MM) to centimeters (CM).
Since 10 millimeters make up 1 centimeter, the conversion is simple, but doing it efficiently in Excel saves time and ensures accuracy.

In this guide, I'll show you different methods to convert MM to CM using formulas, the CONVERT function, and formatting techniques.

When working with measurements in Excel, I often need to convert millimeters (MM) to centimeters (CM). Since 10 millimeters make up 1 centimeter, the conversion is simple, but doing it efficiently in Excel saves time and ensures accuracy. In this guide, I’ll show you different methods to convert MM to CM using formulas, the CONVERT function, and formatting techniques.

Key Takeaways:

  • Accurate measurements in Excel prevent errors in data analysis and project planning.
  • The CONVERT function efficiently transforms units like millimeters to centimeters.
  • A simple formula, =A2*0.1, offers a quick way to convert MM to CM.
  • Paste Special can streamline bulk conversions without extra columns.
  • Automating conversions with VBA saves time for repetitive tasks.

 

Mastering Unit Conversion in Excel

Why Accurate Measurements Matter in Excel

Accurate measurements are the bedrock of reliability and precision in any project that entails data analysis or planning. In Excel, having precise measurements is crucial because even the smallest discrepancy can lead to substantial errors down the line. When working on a construction plan, a product design, or a DIY project with specific measurement requirements, it’s vital that every detail is correctly captured to ensure the integrity of the project.

With Excel, we can seamlessly integrate these requirements into our spreadsheets, thereby reducing the likelihood of manual entry errors and enhancing the overall accuracy of our work.

Understanding Excel’s CONVERT Function

The CONVERT function in Excel is an incredibly useful feature that allows us to transform data between different units of measurement with ease. For instance, when dealing with measurements, I can use the function to seamlessly convert from millimeters (mm) to centimeters (cm), or vice versa, just by specifying the appropriate units. The formula is structured as =CONVERT(number, "from_unit", "to_unit"), and careful attention must be paid to the case sensitivity of unit names. By understanding and utilizing this function, we can handle various unit conversions without the need for external tools or tedious manual calculations.

Incorporating the CONVERT function into workflows not only saves time but also minimizes the potential for human error during unit conversion—a benefit especially pertinent in fields such as engineering, science, and finance, where precision is non-negotiable.

 

Quick Guide to Convert MM to CM

Method 1: Utilize the CONVERT Function for Instant Results

If you’re in need of an immediate solution to convert millimeters to centimeters in Excel, the CONVERT function is your go-to choice. To obtain instant results, enter the function directly into the cell where you want the conversion to appear.

Here’s the super simple formula you would use: =CONVERT(A2, "mm", "cm"). This effectively tells Excel to convert the value in A1 from millimeters to centimeters.

Convert MM to CM in Excel

Just like that, the result is calculated and displayed before your eyes, hassle-free. By mastering this straightforward method, you’ll be handling unit conversions in Excel with exceptional speed and certainty.

Method 2: Implementing a Generic Formula for Versatile Conversions

For those who prefer a more versatile conversion approach, implementing a generic formula in Excel could be the answer. This method involves multiplying the value in millimeters by the conversion factor for turning millimeters into centimeters, which is 0.1 since there are 10 millimeters in a centimeter. By inputting =A2*0.1 into the formula bar, we directly apply this conversion factor.

Convert MM to CM in Excel

This formula can be effortlessly expanded to accommodate other units and conversion factors. After entering the formula, simply drag the fill handle across the range of cells you wish to convert. This adaptability makes it an excellent tool for various conversion tasks that might come up in your spreadsheet work.

 

Advanced Excel Tips for Measurement Conversion

Method 3: Optimizing with Paste Special Feature

When it’s time to optimize conversion processes in Excel, I turn to the Paste Special feature. This feature really shines when dealing with large datasets where I’ve already multiplied all values by 0.1 on a separate column to convert from millimeters to centimeters. Here’s a nifty trick:

STEP 1: Copy the conversion factor.

Convert MM to CM in Excel

STEP 2: Select the range of cells with the original measurements.

Convert MM to CM in Excel

STEP 3: Right-click and choose Paste Special.

Convert MM to CM in Excel

STEP 4: In the dialog box, I select ‘Multiply’ and click OK.

Convert MM to CM in Excel

Voilà, the conversion is applied directly to the original data.

Convert MM to CM in Excel

Optimizing with Paste Special not only streamlines the workflow but also maintains a clean spreadsheet by preventing the need for additional columns solely for conversion purposes. It’s an elegant solution that reduces clutter and maximizes efficiency.

Method 4: Automation through VBA

To fully automate the conversion from millimeters to centimeters in Excel, Visual Basic for Applications (VBA) is an exceptional tool. VBA allows us to write a simple macro that can perform the conversion across a range of cells with just a single run of the code. Here’s a snapshot of how to set this up:

STEP 1: Open the Developer tab and select Visual Basic. Or, press ALT+F11 to open the Microsoft Visual Basic for Applications window.

Convert MM to CM in Excel

STEP 2: In the VBA interface, insert a new module.

Convert MM to CM in Excel

STEP 3: Write the following code snippet:

Sub cm_to_mm_conversion()
Range("B2:B6").Select
Selection.FormulaR1C1 = "=CONVERT(RC[-1],""mm"",""cm"")"
End Sub

Convert MM to CM in Excel

STEP 4: Save this module, click back into the Excel spreadsheet, and run the macro.

Convert MM to CM in Excel

With just a moment’s effort, our VBA script executes the conversion for the specified range.

Convert MM to CM in Excel

For those repetitive tasks, this method is a timesaver and epitomizes the power of automation in Excel.

 

Avoid Common Pitfalls With These Warnings and Tips

It’s easy to fall into certain traps while working in Excel, so let’s keep these key warnings and tips in mind:

  • Pay Attention to Cell References: When copying formulas, ensure relative and absolute references are correctly used. Misaligned references can throw off entire datasets.
  • Update Formulas After Changes: Made changes to the spreadsheet? Double-check your formulas. It’s important they reflect the latest data, especially in collaborations.
  • Beware of Rounding: Dealing with precision measurements requires careful rounding. Utilize Excel’s ROUND, ROUNDUP, and ROUNDDOWN functions to maintain control over this.

Following these tips can safeguard against mistakes and maintain the integrity of your data conversions. It reinforces the necessity to meticulously review and verify calculations for error-free results.

 

FAQ Section

How do I CONVERT mm to cm in Excel?

To convert millimeters to centimeters in Excel, use the CONVERT function like this: =CONVERT(A1, "mm", "cm"). Just replace A1 with the cell containing your mm value to get the result in cm. It’s quick and efficient.

How can I apply the convert function to multiple cells simultaneously?

Apply the CONVERT function to multiple cells by dragging the fill handle. Enter the function in the first cell, for instance =CONVERT(A2, "mm", "cm"), then click and drag the corner of the cell downwards or across to fill other cells with the conversion. This copies the function to each cell with relative references.

What should I keep in mind while using the convert formula in Excel?

When using the convert formula, remember to double-check unit spellings against Excel’s list and understand when to use absolute references with $. Check conversions for correctness, and use ‘Trace Precedents’ to track formula origins for troubleshooting.

How do I change the unit of measurement in Excel?

Change the unit of measurement in Excel through Excel Options. Go to File, click on Options, select Advanced, scroll to Display, and in “Ruler Units,” choose from inches, centimeters, or millimeters. Click OK to apply the changes. This adjusts ruler measurements in Page Layout View.

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Founder & Chief Inspirational Officer

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John Michaloudis is a former accountant and finance analyst at General Electric, a Microsoft MVP since 2020, an Amazon #1 bestselling author of 4 Microsoft Excel books and teacher of Microsoft Excel & Office over at his flagship MyExcelOnline Academy Online Course.

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