How to Combine Percentages in Excel: A Step-by-Step Guide

Combining percentages in Excel can be done quickly with a simple formula. Just enter the percentages you want to combine, use the SUM function, and apply percentage formatting to the cell. This overview should help you understand how to accomplish the task quickly.

After completing the action of combining percentages in Excel, you will have a single percentage value that represents the total combined percentage of the individual values you started with.


Excel is a powerful tool that can help us analyze, organize, and calculate various types of data. One of the many tasks you can perform with Excel is combining percentages. This is a useful skill to have for anyone working in finance, data analysis, or anyone who needs to combine data from different sources.

Combining percentages can help you understand the overall impact of several individual percentages, such as combining the success rates of different sales teams into a company-wide percentage, or merging survey results from various demographics. Mastering this technique can help you make more informed decisions by providing a clearer picture of the data at hand.

Step by Step Tutorial: How to Combine Percentages in Excel

This section will walk you through a step-by-step process to combine percentages in Excel.

Step 1: Enter your percentages

Input each percentage you wish to combine into separate cells in Excel.

Each percentage should be inputted as a decimal. So for example, 50% should be entered as 0.50.

Step 2: Use the SUM function

In a new cell, type in the SUM function to add up the percentages.

The SUM function is a basic Excel function that will add up a series of numbers. In this case, it will add up all your percentages.

Step 3: Apply percentage formatting

Once you have your total, apply percentage formatting to the cell to convert the decimal sum into a percentage.

Excel will automatically multiply the decimal by 100 and add a percentage sign, giving you the combined percentage.


Simplifies data analysisCombining percentages simplifies the data you are working with, allowing you to analyze overarching trends more efficiently.
Enhances presentationPresenting a single, combined percentage can be more impactful than presenting several individual percentages.
Time-savingThe process of combining percentages in Excel is quick and easy, saving you time in your calculations.


Potential for errorIf percentages are not entered correctly as decimals, the final result can be skewed.
Over-simplificationCombining percentages can sometimes be an over-simplification of data, potentially masking important details.
Dependence on accurate inputsThe combined percentage is only as accurate as the individual percentages entered, so there is a reliance on initial accuracy.

Additional Information

When combining percentages in Excel, it’s important to remember that the context of your data matters. For instance, if you’re combining percentages from different sample sizes, the combined percentage might not accurately represent the whole. You also might need to consider whether the percentages you are combining are independent of each other. If the percentages are interconnected, combining them might not make sense.

Another tip is to use the AVERAGE function instead of SUM if you want to find the mean percentage. This could be useful in scenarios where you’re looking at an average success rate or average growth rate.

Lastly, always double-check your work. A simple mistake in data entry or formula application can lead to incorrect conclusions. Remember, garbage in, garbage out!


  1. Enter your percentages into separate cells as decimals.
  2. Use the SUM function to add up the percentages.
  3. Apply percentage formatting to the combined sum to get the result as a percentage.

Frequently Asked Questions

Can I combine percentages from different sources?

Yes, you can combine percentages from different sources as long as they are related and can logically be combined.

What if my percentages add up to more than 100%?

Excel will still calculate the sum of percentages even if they add up to more than 100%. This might happen when you’re combining percentages of parts that overlap.

How do I convert a number into a percentage in Excel?

To convert a number into a percentage, you can multiply it by 100 and add a percentage sign, or you can simply apply percentage formatting to the cell.

What’s the difference between SUM and AVERAGE when combining percentages?

SUM adds all the percentages together for a total, while AVERAGE calculates the mean percentage.

How do I ensure my combined percentage is accurate?

Double-check your data entry and ensure that your percentages are correctly formatted as decimals. Always cross-reference your results for accuracy.


Combining percentages in Excel is a handy skill that can streamline your data analysis process. Whether you’re a student, professional, or just someone who loves to organize their personal data, understanding how to merge percentages can be incredibly beneficial.

Remember that while Excel does a lot of the heavy lifting for you, it’s still crucial to input your data accurately and consider the context of your percentages. So go ahead, give it a try, and watch as Excel turns those individual percentages into a meaningful combined figure.

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